hallicraliers OPERATING AND SERVICE INSTRUCTIONS COMMUNICATIONS TRANSCEIVER MODEL SR-1SO IMPORTANT BEFORE OPERATING THE SR-1S0 REFER TO PAGE 16 OF THIS MANUAL, PARAGRAPH 8-3 (BIAS ADJUSTMENT). THE BIAS ADJUST MENT ON THE POWER SUPPLY MUST BE SET PROPERLY TO PRE VENT PERMANENT DAMAGE TO THE FINAL AMPLIFIER TUBES AND FOR OPTIMUM PERFORMANCE OF THIS EQUIPMENT. "The Hallicrafter's Company u;arrants each neu; radio product manu factured by it to be frce. from defective material and u;orkmanship and agrees to remedy allY SIIeI. de fect or to fllTllish a neu; part in ex change for any part of any unit of its manllfacture u;hich under nor mal installation, use and service discloses such defcct , provided the unit is delivcred by the ou;ner to Oll r authorized radio dealer, u;hole saler, from u;/lOm pllrchased , or, authorized service center, ill tact , for examination, u;ith all trans/JO rtation charges prepaid u;ithin ninety days from the date of sale to original /,urchaser and provided that such examination discloses in Ollr ;udgment that it is thus defective. This u;arranty does not extend to any of our radio products u;hich have been sub;ected to misuse, neglect , accident , incorrect u;iring not our ou;n, improper instal/at ion, or to use in violation of instructions furnish ed by us, nor extended to units u;hich have been repaired or altered outside of our factory or authorized scrt; ice center, nor to cases u;here the serial number thereof has been removed , defa ced or changed , not to accessories used thereu;ith not of our own manufacture. Any part of a unit approved for remedy or exchange hereunder u;i1/ be remedied or exchanged by the authorized radio dealer or u;hole saler u;ithout charge to the ou;ner. This u;arranty is in lieu of all other u;arranties expressed or implied and no representative or person is aut/lOrized to assume for "" allY other liability in connection u;ith th e sale of our radio produ cts:' pliXff} hallicraliers CS@o 092·017851 Figure I. Hol/icroffers Model SR· 150 Transceiver. SECTION I GENERAL DESCRIPTION The Hallicrafters Model ,SR-150 Transceiver is a precision-built, compact, high-performance radio equipment of advanced design. This trans ceiver utilizes 19 tubes and a dual conversion IF to provide for the transmission and reception of single-sideband (SSB) and continuous wave (CW) signals on the 80, 40 , 20, 15, and 10 meter bands. The versatility of SR-150 equipment permits it to be operated as a fixed station or as a mobile equipment. A 117-volt, 50/ 60-cycle, AC power supply, complete with speaker (Model PS-150- 120) , is available for fixed-station use; a 12-volt DC power supply, Model PS-150-12, and amobile mounting rack (Model MR-150) are available when the transceiver is to be used in a mobile configuration. An advanced feature of the SR-150 equipment is the Receiver Incremental Tuning (RIT) con trol. This control enables the operator to unlock the receiver frequency and tune the receiver apprOXimately two KC either side of the trans mitter frequency. Flipping the RIT switch OFF automatically returns the equipment to the trans ceiver condition. ·1· Another special feature is the amplified Automatic Audio Level Control (AALC) which functions in the transmit mode. The AALC circuitry prevents splatter due to severe flat-topping of the final amplifier by providing about 15 DB of compres sion after a small amount of flat-topping occurs. Other features of the Model SR-150 Transceiver include: • A stable, accurately-calibrated VFO. • A built-in, 100-KC crystal calibrator. • Upper and lower sideband, MaX, (push-to talk), VOX, Manual CW, and break-in CW operation. • A crystal-lattice filter. • A product detector. • An S-meter / RF output level indicator. IMPORTANT Do not, under any circumstance, attempt to operate the SR-150 equipment before becoming completely familiar with the in structions contained within this manual. SECTION II TECHNICAL DATA TUBES AND FUNCTIONS VI 6AZ8 Receiver RF Amplifier and Calibrate Oscillator. V2 12BA7 Receiver and Transmitter First Mixer V3 6EA8 6.0-MC to 6.5-MC IF Amplifier and Audio Cathode Follower. V4 12BA7 Receiver Second Mixer. V5 6EA8 Receiver Second !650·KC IF Amplifier and AALC Amplifier. V6 12BE6 Product Detector. V7 6AH6 Transmitter Second Mixer. V8 12AT7 Heterodyne Oscillator and Cathode Follower. V9 6EA8 VFO and Cathode Follower. Vl0 12AT7 Carrier Oscillator/BFO. FREQUENCY COVERAGE: Eight-band capability - Full coverage provided for 80, 40, 20, 15, and one segment of the 10- meter band. Provisions made and crystals available for the remaining three segments of the 10-meter band. Other frequencies are avail able on request. OPERATION: Single Sideband - VOX or MOX (push-to-talk). CW - Manual or break-in. FRONT PANEL CONTROLS: Tuning; Band Selector; Final Tuning; RF Level - Mic Gain; Preselector; RIT; RF Gain - AF Gain; Operation (Off/Standby/MOX/ VOX); Function (CW/USB/LSB); Cal; Cal Adj. GENERAL: Dial Calibration - 5-KC increments (Built-in, 100-KC crystal calibrator). Calibration Accuracy - Less than 2 KCbetween 100- KC points after in dexing. VFO - 500-KC tunable range. stability - Less than 300 CPS after warmup. Tubes - 18 plus one voltage regulator, ten diodes, and one varicap. - 2- Vl1 6T8A Receiver First Audio, AGC Detector, VOX Diode, and QT Diode. V12 OA2 Voltage Regulator. VB 6AQ5A Receiver Audio Output. V14 12DQ6B/ 12GW6 Power Amplifier. V15 12DQ6B/ 12GW6 Power Amplifier. V16 12BY7A Transmitter Driver. V17 6EA8 Receiver and Transmitter 1650-KC IF Amplifier and Meter Amplifier. V18 12AX7 First and Second Microphone Amplifier. V19 12AT7 VOX Amplifier and VOX Relay Amplifier. Ambient Temperature Range - Minus 20° to plus 50°C. Construction - Rugged, lightweight aluminum. Dimensions (HWD) - 6-1/2 by 15 by 13 inches. Net Weight - 17-1/2 pounds. Shipping Weight - 22 pounds (approx). TRANSMITTER: Output Tubes - Two 12DQ6B tubes in parallel. Output Impedance - Fixed, 50-ohm pi-network. Power Input - SSB .... 150 watts PEP MAX. CWo .... 125 watts MAX. Carrier and Unwanted Sideband Suppression - 50 DB. Distortion Products - 30 DB. Audio Response - 600 CP S to 2800 CP S @ 3 DB. Microphone Input - High impedance. RECEIVER: Sensitivity - 1 microvolt for a 20-DB signal-to noise ratio. Audio Output - 2 watts. Output Impedance - 3.2 ohms and 500 ohms. Overall Gain -1 microvolt for 1/2 watt output. Antenna Input""::" 50 ohms. IF - Dual Conversion: First IF .... 6.0 MC to 6.5 MC variable (tunes with the VFO). Second IF ... 1650 KC, crystal-lattice filter. Heterodyning Crystals - Type CR-23/U, third overtone, series re sonant. ACCESSORIES: Mobile Mounting Rack Model MR-150 - Quick release design adaptable to transmission hump or floor mount ... all connections made simul taneously ... access holes for VOX controls. Net Weight - 10 pounds. Shipping Weight - 12-3/4 pounds (approx). 12-volt DC Power Supply Model PS-150-12 Designed for out-of-the-way trunk installation ... terminal strip provides for quick-and-easy connection to the cable from the mounting rack ... contains five silicon diode rectifiers and four transistors. Input Power Requirements: Transmit (CW) .... 19 amperes. Receive ......... 14 amperes. Dimensions (HWD) - 3-3/4 by10 by6-3/4 inches. Net Weight - 5-1/2 pounds. Shipping Weight - 9 pounds (approx). 117-volt AC Power Supply Model PS-150-120 - Styled as a companion unit to the Model SR-150 Transceiver, this supply also contains a 4-inch by 6-inch speaker ... one-cable connection carries power to, and audio from, the transceiver .. may be plugged into any 115-voltwall outlet.. contains five silicon diode rectifiers. Input Power Requirements: Transmit (CW) .... 290 watts. Receiver ........ 150 watts. Dimensions (HWD) - 6-1/4 by7-1/2 byl0 inches. Net Weight - 22 pounds. Shipping Weight - 28-1/2 pounds (approx). SECTION III INSTALLATION WARNING LETHAL HIGH VOLTAGE IS PRESENT WITHIN THIS EQUIPMENT. BE CARE FUL WHEN INSTALLING THE UNIT, WHEN MAKING BIAS ADJUSTMENTS, AND WHEN PERFORMING CHECKS UNDER THE CHASSIS. 3·1. UNPACKING. Carefully remove this equipment from its carton and packing material and examine it for any possible damage which may have occurred during transit. Should any sign of damage be ap parent, immediately file a claim with the carrier stating the extent of the damage. Check all ship ping labels and tags for special instructions before removing or destroying them. 3·2. LOCATION. The Model SR-150 Transceiver maybeplaced in any location permitting free air circulation through the ventilation openings in the cabinet. However, excessively warm locations such as those adjacent to. radiators and heating units should be avoided. 3·3. ANTENNAS. Antenna connections are provided on the rear of the transceiver, as shown in figure 2. If a com mon antenna is used, the antenna switch (S2) should ·3· be in the down (common) position and the antenna connected to the bottom connector. If separate antennas are used, the switch should be up, the receiver antenna should be connected to the top connector (Jl), and the transmitter antenna con nected to the bottom connector (J2). Figure 3 shows an installation, in block dia gram form, making use of a linear amplifier and an external antenna changeover relay. Connections to the power supply from the antenna changeover relay are internal solder connections. Refer to figures 14, 15, 17, and 18 for the internal chassis views and schematic diagrams of the power sup plies used in conjunction with the Model b'R-150 Transceiver. In the installation Shown, the re ceiver is connected directly to the relay through the top antenna connector (Jl); the transmitter is connected through the bottom antenna connector (J2) to the linear amplifier which, in turn. is con nected to the relay. If desired, two separate anten nas may be used in the installation shown, elimina ting the use of the antenna changeover relay. NOTE Never operate the transceiver without making a connection to a proper antenna or to a resistive dummy load. Refer to the ARRL handbook or similar pub lications for the selection and installation of antennas. 52 JI J2 J7 J4 J5 092-017850 Figure 2. Rear View of Transceiver. 3-4. MOBILE INSTALLATION. The Model SR-150 Transceiver may be in stalled in any vehicle having a 12-volt DC power source. To complete this mobile installation, a Model PS-150-12 Power Supply and a Model MR-150 Mobile Mounting Rack will be required. The PS-150-12 Power Supply, as shipped, is wired for vehicles having the negative side ofthe battery grounded_ If this equipment is to be installed in vehicles having the positive side grounded, make the wiring change noted in figure 18, schematic diagram of the Model PS-150-12 Power Supply. Before installing the equipment, it is neces sary to set the position of the connectors in the rear of the mounting rack. This may be accom plished as follows: 1. Set the mounting rack on a work bench with the rear of the rack on the bench and the side panels open. Make sure the four nuts securing the power and antenna con nectors have been loosened. 2. Holding the transceiver with the front panel up, very carefully slide the trans ceiver into the rack until the power and antenna connectors mate with those in the mounting rack. IMPORTANT Extreme care must be exercised inper forming this step to prevent damaging the connectors on the transceiver and in the mounting rack. -4- 3. With the transceiver securely in position, turn the equipment on its side and tighten the four nuts holding the connectors in the mounting rack in place. 4. Carefully remove the transceiver from the mounting rack and proceed with the installation. A base bracket and mounting straps are pro vided for installing the Model MR-150 Mounting Rack under the dashboard or on the transmission hump (see figure 4). When selecting a location for installing the mounting rack, an open area should be allowed on the top or bottom to provide adequate ventilation for the transceiver when it is inplace. The SR-150 Transceiver may be installed at this time if desired. Before installing the trans ceiver in the mounting rack, ascertain that the antenna switch on the rear panel is in the down (common) position. Slide the transceiver back into the MR-150 Mounting Rack so that a good connec tion is made to the power and antenna receptacles on the rear inside of the mounting rack. Secure the units together by means of the wing screws on both sides of the mounting rack. The Model PS-150-12 Power Supply may be installed in any convenient location. In the instal lation discussed in this book, the power supply will be installed in the trunk '(see figure 5). Mount the power supply securely, using self-tapping screws. Position the power supply in such a manner that the side with the terminal strips is accessible. LINEAR AMPlIFIE.R IN OUT TRANSMIT ,-- --0 \[7 EXTERNAL ANTENNA RELAY SR - I 50 TRANSCEIVER RECEIVE b D -0 POWER ANTENNA ~ POWER I SUPPLY SWITCH L..o SOCKET .... I PS-150-120 (UP) (MALE) I A I II !O PIN II POWER (? PIN 10 PLUG (FEMALE) TO EXTERNAL 117 V-GO CPS ) 092·017686B Figure 3. Base InstalIation, Using a Linear Amplifier. Run the cable from the mounting rack under the floor mat and under the rear seat into the trunk. Since this cable is weatherproof, it may be threaded underneath the vehicle if desired. Cut the cable to the desired length, strip the wires, and connect these wires to the terminal strip on the power supply (see figures 5 and 17 for color coding and terminal numbering). IMPORTANT Before connecting to the vehicle's bat tery, check the transceiver, if already installed, to ascertain that the OP ERA TION switch is in the OFF position. Connect the two NO. 8 A WG wires supplied between the two-connector terminal strip on the power supply and the battery. The red/white wire should be connected from the top terminal on the power supply to the positive (+) side of the battery and the red/black wire from the bottom terminal to the negative (-) side ofthe battery. These wires should be cut to a suitable length before being con nected to the battery. The positive lead should be connected to the battery through a 30-ampere fuse block (not supplied, see figure 5). If the vehicle has a positive ground electrical system, fuse the nega tive lead. CAUTION USE CARE WHEN MAKING CONNEC TIONS TO THE BATTERY IN THE VEHICLE. THE POWER IN ABATTERY CAN CAUSE DANGEROUS BURNS AND EVEN EXPLOSION IF SHORT CIRCUITED. ·5- Connect the speaker to the jack provided on the side of the mounting rack. This jack accepts a standard PL55 type plug. Use of the auto radio loud speaker is not recommended unless a switch is installed to remove the speaker from the auto radio when operating the SR-150. Install the antenna in the manner recom mended by the antenna manufacturer. Connect the coaxial cable from the antenna, through the hole in the right side of the mounting rack, and solder to the rear of the phono-pin-plug type connector in the rear of the mounting jack. Use care when soldering. Solder on the outside of the center pin must be removed to prevent possible damage to the female antenna connector in the transceiver. If desired, prior to installing the mounting rack, a length of coaxial cable may be connected from this phono-pin-plug type connector to a coaxial connector attached to the right side of the mount ing rack in the space provided. If this is done, when the antenna is installed, it may be attached to the connector using a mating connector. Connect a suitable microphone to the jack provided on the front panel. It is important that the internal wiring of the microphone be as shown in figure 6. IMPORTANT Before proceeding, refer to alignment procedure, paragraph 8-3, for bias adjustment. 1111111111111111111111111111111111111111111111111t- DASH BOARD ~-- , \ , ---- ---",\\~\ \ \ \ \ \ \ \\\\\ 000 ,----). \ \ \ \ , \ I' \ \ \ TRANSMISSION HUMP 092·019687 Figure 4. Installing the Moclel MR·150 Mounting Rack. Only after familiarizing yourself with the controls and their functions, as outlined in Sections IV and V, should you perform an opera tional check. It is recommended that the engine be running while operating the Model SR-150 Trans ceiver to prevent drainingpower from the battery. 3·5. MOBILE NOISE SUPPRESSION. The following suggestions may be helpful in the suppression of noise encountered in mobile operation. Install resistor-type spark plugs and coaxial bypass capacitors in the ignition coil, generator, and voltage regulator leads. Install bracket-mounted coaxial capacitors in the gener ator and battery leads to the voltage regulator and connect a 0.005 microfarad mica or disc capacitor from the generator lead to ground. Chokes maybe used in the generator field and armature leads instead of the bypass capacitors - approximately 12 turns of NO. 18 wire on a 1/4-inch powdered iron core for the field lead choke and approxi mately 12 turns of NO. 12 or NO. 14 wire on a 1/4-inch powdered iron core for the armature lead choke. ·6· Hallicrafters has available a Mobile Noise Suppression Kit, Model HA-3, which will fulfill any suppression requirements of this installation. Additional information, concerning the proper suppression of mobile noise, is available in the Handbook of Instructions for Hallicrafters' Model HA-3 Mobile Noise Suppression Kit and in other current handbooks on the same subject. 3·6. BASE INSTALLATION. The Model SR-150 Transceiver, as a base station, may be used with or without a linear amplifier. To operate from 117 volts AC, the Model PS-150-120 Power Supply, or an equivalent, is required. Merely connect the power plug from the power supply to the receptacle on the rear of the transceiver, connect the AC cord from the power supply to the wall outlet, and connect to an antenna installation as described in paragraph 3-3. A four by six inch speaker is contained in the power supply and is interconnected to the trans ceiver through the power plug. 2 RED #18; 250V @175 MA WHITE #18; NEGATIVE BIAS BLACK/WHITE #18; SWITCHING BROWN #12; HEATERS BLACK #12; GROUND ORANGE # 18; SPARE PS-150 -12 POWER SUPPLY m TO POSITIVE POST " OF BATTERY I 30 AMP FUSE TO TOP (+) TERMIN,AL ON POWER SUPPLY Figure 5. Wiring Diagram 01 Mobile Installation. r- - - -. - I I I I I MICROPHONE I L_ - - - -.J PLUG 089·003330 Figure 6. Required Microphone Wiring., IMPORTANT Before operating the SR-150, the bias adjustment control on the power supply must be set. See paragraph 8-3 of the alignment procedure. If a linear amplifier and an antenna change over relay are used, the cap on the plug of the power supply cable must be loosened, enabling wires to be soldered to pins 10 and 11 of the plug (see figure 3), thus providing a control circuit for the relay. .. . SECTION IV FUNCTION OF OPERATING CONTROLS All controls utilized during normal oper ation of Hallicrafters Model SR;;.150 Transceiver are located' on the front panel (see figure 7). . 4-1. RIT CONTROL - ON/OFF. , : .' The Receiver Incremen.tal Tuning (RIT) ·con-. . . trol is made up of two controls;with concentI:~c -7- shafts. The ON/OFF function of the lever control either puts the variable-element RIT control in or out of operation. This control, in the ON position , enables the operator to fine-tune the receiver plus or minus two KC by means of the RIT potentio meter (round knob) without disturbing the.initial calibration or tr.an~mitting frequency. Returning the control to the OFF position locks Ule receiver frequency to the transmitter frequency. 092-0 17849 Figure 7. Front Panel View of Transceiver . 4-2. RF GAIN - AF GAIN. The RF GAIN and AF GAIN controls are two controls mounted on concentric shafts. The RF GAIN control (lever contr-ol) varies the gain of the receiver RF amplifier and mixer. Maximum sen sitivity is obtained with the control set at 10 (fully clockwise). The AF GAIN control (round knob) adjusts the the audio output level at the speaker terminals and PHONES jack. Clockwise rotation increases the signal applied to the grid of the audio amplifier, thus increasing the audio output. 4-3. OPERATION. The OPERATION control is a four-position switch. In the OFF pOSition, all power is discon nected from the circuitry. In the STBY position, the receiver portion of the unit is in operation and all circuits common to both receiver and transmitter are in the receive condition. In this position, those functions used only in the transmit mode are biased off. In the MOX (push-to-talk) , position, the transmitter portion of the unit is in operation and all circuits common to both trans mitter and receiver are in the transmit condition. In this pOSition, those circuits used only in the receive mode are automatically biased off when the transmitter is keyed (microphone button depressed). In the VOX position, the transmitter is energized by voice or part of the first char acter of a CW transmission. In the absence of voice or keying, the unit is automatically placed in the receive mode. This portion can also be referred to as Automatic. 4-4. MIC JACK. The MIC jack provides for the connection of a push-to-talk microphone for use in MOXtrans mission. Thepush-to-talk switch is bypassed when transmitting in the VOX mode. 4-5. FUNCTION. The FUNCTION control is a three-position switch. This switch is used to select the mode of operation: CW, LSB, or USB. 4-6. CALIBRATION ADJUSTMENT (CAL ADJ) . The CAL ADJ control varies the frequency of the Variable Frequency Oscillator (VFO) over a small range so that its frequency can be set precisely when compared to a standard. 4-7. TUNING (VFO). The TUNING control tunes in the frequency to which you are listening. This control is con nected to the tuning dial which presents a visual indication of the frequency in the left-hand window on the panel. As an added feature, the position of this knob may be adjusted by using the bristol wrench supplied. Loosen the two set screws and position the TUNING knob on the shaft against the felt pad for the desired amount of dragor torque. 4-8. OFF-CALI BRA TE (CAL). The OFF-CAL control is a two-position switch used to turn the crystal calibrator off or on. When in the CAL or on position, it provides stan dard frequencies at 100-KC intervals to accurately -8- calibrate the VFO. 4-9. BAND SELECTOR. The BAND SELECTOR control is an eight position switch used to select the desired band for receiving or transmitting. This control also indicates the low-frequency end of the band and which scale, red or black, to read on the dial for direct frequency determination. 4-10. PHONES JACK The PHONES connector provides for the use of commercially available headphones. When headphones are used, the internal wiring to the speaker terminals is disconnected. 4-11. PRESELECTOR. The PRESELECTOR tunes to the desired frequency within a given band, as indicated by the setting of the BAND SELECTOR. The function of the PRESELECTOR, however, is determined by the OPERATION control. With the OPERATION control in the STBY position, the PRESELECTOR tunes the receiver RF and first mixer stages; with the OPERATION control in the MOX or VOX position, the PRESELECTOR tunes the transmitter mixer and driver stages. 4-12. RF LEVEL-MIC GAIN The RF LEVEL and MIC GAIN controls are two controls mounted on concentric shafts. The RF LEVEL control (lever control) varies the out put of the transmitter mixer, thereby varying the RF output. Maximum drive to the output stages is obtained with the control set at 10 (fully clockwise). The RF LEVEL control functions only in the CW mode of operation. The MIC GAIN control (round knob) varies the audio level from the microphone amplifier stages to the balanced modulator. The control has suffi cient range to permit adjustment of any high-level crystal microphone or low-level dynamic micro phone normally used for voice communication. 4-13. FINAL TUNING. The FINAL TUNING control consists of a continuously tunable capacitor with a band segment indicator. This control tunes the final output stage to the operating frequency. 4-14. S-METER. This meter functions as an indicator of rei a tive signal strength in the Receive mode and as a relative power output indicator in the Transmit mode. SECTION V TUNING PROCEDURE 5-1. GENERAL. The tuning procedure of the Model SR-150 Transceiver is not complicated; however, care should be exercised when tuning to insure peak performance of the equipment. The following paragraphs describe the procedures for receiver and transmitter tuning. IMPORTANT Before operating the SR-150, the Bias Adj. control on the power supply must be set. See paragraph 8-3 of alignment procedure. 5-2. RECEIVER CALIBRATION. Preset the controls as indicated: OPERATION ...... STBY (receive,powero~ RF GAIN ........ Maximum AF GAIN ........ As required FUNCTION ....... Desired sideband BAND SELECTOR .. Desired band TUNING ......... 100-KC point nearest desired frequency - 9- PRESELECTOR .... Desired band segment RIT ............ OFF CAL ........... CAL (on) CAL ADJ ........ As required. To calibrate, set the TUNING control to the 100-KC point on the dial nearest the desired frequency. Rotate the CAL ADJ control for zero beat. It may be necessary to increase the AF GAIN control to get sufficient indication at or near zero beat. The RIT control switch must be in the OFF position when calibrating. Turn the CAL switch to OFF and tune to the desired frequency. Peak the PRESELECTOR control for maximum S-meter indication. NOTE The CAL switch should be in the OFF pOSition in normal use of the receiver. It should be in the CAL position only when calibrating the receiver. 5-3. BASIC TUNE-UP. Preset the indicated controls as follows: OPERATION ...... MOX FINAL TUNING .... Desired band segment FUNCTION ....... CW BAND SELECTOR .. Desired band TUNING ......... Desired frequency PRESELECTOR ... Desired band segment RF LEVEL .. -.... Between 4 and 5, or as required. Adjust the RF LEVEL control until a small indication is seen on the S-meter. In the transmit mode, the S-meter indicates relative RF output voltage. Adjust the FINAL TUNING control for maximum output and then adjust the PRESELEC TOR for maximum output indication. AdjusttheRF LEVEL control as required to keep the S-meter reading below S9, while tuning the PRESELECTOR. 5-4. MANUAL CW OPERATION. Use the procedure as given in paragraphs 5-2 and 5-3. (If a key is plugged into the Key jack, J5, it must be closed.) AdvancetheRFLEVELcontrol to just below. saturated output. Saturated output is determined in the following manner. start at "0" settingoftheRF LEVEL con trol and slowly increase the control (clockwise) while observing the S-meter. Set the control at a point where further rotation does not cause an ap preciable increase in the S-meter reading. This is saturated output; operate slightly below this level. The transmitter is now ready to key. To receive, it is necessary to turn the OPERATION switch to the STBY position. 5-5. BREAK-IN CW OPERATION. Use the tuning procedure as given in para graphs 5-2, 5-3, and 5-4. Set the OPERATION -10- switch to the VOX position. Adjust the delay control (see figure 12) for the desired drop-out delay; delay increases with clockwise rotation. Theunit is now ready for break-in CW operation. 5-6. PUSH-TO-TALK SSB OPERATION (MOX). Use the procedure given in paragraphs 5-2, 5-3, and 5-4. Set the FUNCTION switch to the de sired sideband (USB or LSB). SettheOPERATION switch to MOX. Depress the microphone switch (push-to-talk) and advance the MIC GAIN control (while speaking into the microphone in a normal voice level) until the S-meter indicates approxi mately one-half the level shown at saturation. The MIC GAIN setting is not critical, because of the action of the AALC circuitry, and may be advanced slightly beyond this point to increase compression. Typical settings will run from 5 to 8. 5-7. VOICE CONTROLLED SSB OPERATION (MOX). For voice operated transmission, use the tuning procedure in paragraphs 5-2, 5-3, and 5-4. Set the FUNCTION switch to the desired sideband (USB or LSB). Set the OPERATION switch to the VOX position. Set the receiver AF GAIN to "0" or a low level. While speaking into the microphone, advance the VOX gain control clockwise (see figure 12) until the VOX relay closes; use no more VOX gain than necessary. Adjust the delay control for the desired drop-out delay; delay time increases with clockwise rotation. It may be necessary to re adjust the VOX gain slightly because of interaction between the controls. Adjust the receiver AF GAIN to the desired listening level. Advance the QT (anti-trip) control (see figure 12) clockwise until received signals do not actuate the VOXrelay. Use no more anti-trip gain than necessary. SECTION VI THEORY OF OPERATION 6-1. GENERAL. The Model SR-150 Transceiver consists of a double-conversion receiver and a double-con version transmitter. The VFO circuitry, the heterodyne crystal oscillator circuitry, and the crystal filter/IF circuitry are common to both the transmitter and receiver_Refer to figure 8 for a block diagram of the equipment and to figure 21 for a schematic diagram_ 6-2. RECEIVER CIRCUIT. The signal at the antenna is applied to the receiver's RF amplifier stage (VIA) through the antenna relay located in the transmitter final amplifier section. This signal is amplified and then fed to a mixer (V2), where it is mixed with the signal from the heterodyne crystal oscillator (V8), resulting in a variable IF signal of 6.0 MC to 6.5 MC. The RF amplifier and mixer tuned circuits are selected by the BAND SELECTOR switch and tuned by the PRESELECTOR control. The variable IF signal is amplified by a tunable IF amplifier (V3A) and then mixed with the signal from the VFO (variable frequency oscillator), V9, in the receiver mixer (V4), re sulting in a second IF signal of 1650 KC. This signal is amplified by the first 1650-KC IF amplifier (VI7A), passed through the crystal lattice filter (FLl), and applied to the second 1650-KC IF amplifier (V5A). The output from V5A is fed to the product detector (V6) where it is mixed with the correct carrier oscillator output to present the desired detected sideband signal to the receiver first audio amplifier (VllA). The output of the first audio amplifier is applied to the audio output stage (VI3) and then to the speaker. The proper sideband is selected by a shift in the VFO frequency coupled with a selection of the proper carrier oscillator and the passage of the signal through the crystal-lattice filter, thereby rejecting the undesired sideband. - 11 - 6-3. TRANSMITTER SECTION. The signal from the microphone is applied through the first and second microphone ampli fiers (VI8A and VI8B) and fed to an audio cathode follower (V3B). The output of V3B is presented to the balanced modulator along with the selected signal from the carrier oscillator (VI0), to pro duce a double- sideband suppressed carrier signal. The balanced modulator output signal is ap plied to the first 1650-KC IF amplifier (VI7A), through the crystal-lattice filter (FLl) which attenuates the unwanted sideband, to the receiver and transmitter mixer (V2) where the signal is added to the VFO (V9) output signal. The sum of these signals (in the 6.0-MC to 6.5-MC range) is then amplified by the tunable IF amplifier (V3A) and fed to the transmitter mixer (V7) where it is subtracted from the heterodyne crystaloscil lator (V8) signal. The output of the transmitter mixer is the desired operating frequency and is amplified by the transmitter driver (VI6) and then fed to the transmitter final amplifiers (V14 and VI5). The selected final output signal is applied through the antenna relay to the antenna. The tuned circuits of the transmitter mixer and transmitter driver are selected by the BAND SELECTOR switch and tuned by the PRESELEC TOR control, while the final amplifier output tuned circuit is selected by the BAND SELECTOR switch and tuned by the FINAL TUNING control. The Automatic Audio Level Control (AALC) circuitry operates in the following manner. When a small amount of flat-topping occurs in the final amplifier, an audio Signal appears on the ampli fier bias line, in proportion to the amount of flat topping. This audio signal, which is not present without final amplifier flat-topping, is coupled to the AALC amplifier (V5B) whose output is recti fied by diodes CR7 and CR8. The resulting DC voltage, which is in direct proportion to the amount of flat-topping occurring in the final amplifier, is connected to the 6.5-MC to 6.0-MC IF amplifier and the first 1650-KC IF amplifier as gain control bias. "'11 .0' t: ;0 ?> OJ 0- n ,... t:l ;:::; Q' '" a " 0 ... -I a " In n .. <' ~ RECEIVER I, R RECEIVER 12 TUNEABLE I. FIRST AND RECEIVER 13 1650KC RF IF AMPLIFIER TRANSMITTER MIXER IF T MIXER AMPLIFIER AMPLIFIER f2 X2 f3 X2 T f3 I, R X, ANTENNA X2 I R~ X, VFO 6f ~500KC f, HETERODYNE CRYSTAL OSCILLATOR I, X, 12 TRANSMITTER f----- RECTIFIER I- ->- I Af5 I I AUDIO ~ SECOND f5 CATHODE MICROPHONE ----- TRANSMITTER SIGNAL -.- RECEIVER SIGNAL ~ COMMON SIGNAL ...:;.- OSCILLATORS -;.- VOICE RELAY MIXER FUNCTIONS MIXER IN RECEIVE RECEIVE and TRANSMIT f, Xl;:; f2 OUTPUT RECEIVER f2. X2-= f3 OUTPUT TRANSMITTER NOT OPERATIVE ---. ___________ ~ _ ______'=_'_'__=__-o- IN TRANSMIT f,+X2~ 12 OUTPUT NOT OPERATIVE XI-f2~f, OUTPUT 15 PRODUCT DETECTOR tf. RECEIVER FIRST AUDIO tf• RECEIVER SPEA KER AUDIO ~ OUTPUT , yf. I ANTI-TRIP RECTIFIER I YDC I RELAY CONTROL AMPLIFIER MICROPHONE SECTION VII SERVICE DATA 7-1. COVER AND CHASSIS REMOVAL. A. TOP COVER REMOVAL. - Loosen the four top-cover screws 1/4 turn only and remove cover. To replace cover, tighten cover screws 1/4 turn only, so that the plastic latch nuts will not be damaged. B. BOTTOM COVER REMOVAL. - Remove the four bottom cover screws located in the feet, and remove the cover. When replacing the bottom cover, make certain that the grounding clip on the cover engages properly at the final amplifier shield partition. C. CHASSIS REMOVAL. - To remove the chassis from the cabinet, it is first necessary to remove the bottom cover (see paragraph 7-1B). Remove the four cabinet screws at the bottom near the cabinet feet and carefully slide the chassis and panel assembly out from the front of the cabinet. 7-2. TUBE AND DIAL LIGHT REPLACEMENT. Access to the dial light and all tubes may be obtained by removing the top cover of the cabinet. See paragraph 7-1A. 7-3. TROUBLESHOOTING. In the design of this transceiver, full con sideration was given to keep maintenance prob lems at an absolute minimum. As in all well designed electronic equipment, maintenance and repair problems are generally confined to the checking and replacement of tubes and semi conductor devices which may become defective. Malfunctions of this nature are usually easily isolated and corrected. However, it is entirely possible that a more obscure malfunction may arise. In this event, only thoroughly trained technical personnel should attempt to service eqUipment of this complexity. A recommended aid to troubleshooting the Model SR-150 Transceiver is ageneral-coverage receiver which can be used to provide a quick check on the various oscillator circuits within the SR-150. A lead connected to the antenna of this receiver, when placed in the proximity ofthe oscillator tube in the circuit to be checked, can determine the presence or absence of signal from the stage in question. - 13 - If a malfunction occurs when operating on one particular band and/or mode of operation, the unit should be checked on all other bands and in all other modes of operation to isolate the difficulty. A careful study of the block diagram (figure 8) will give a quick clue as to which tubes should be checked. The voltage and resistance charts (figures 9 and 10) and schematic diagram (figure 21) will also aid in isolating and correcting a malfunction. 7-4. SERVICE AND OPERATING QUESTIONS. For further information regarding operation or servicing of the Model SR-150 Transceiver, contact the dealer from whom the unit was pur chased. The Hallicrafters Company maintains an extensive system of Authorized Service Centers where any required service will be performed promptly and efficiently at no charge if this equipment is delivered to the service center within 90 days from date of purchase by the original buyer and the defect falls within the terms of the warranty. It is necessary to present the bill of sale in order to establish warranty status. After the expiration of the warranty, repairs will be made for a nominal charge. All Hallicrafters Authorized Service Centers display the sign shown below. For the location of the one nearest you, consult your dealer or your local telephone directory. Make no service shipments to the factory unless instructed to do so by letter, as The Hallicrafters Company will not accept responsi bility for unauthorized shipments. The Hallicrafters Company reserves the privilege of making revisions in current pro duction of equipment and assumes no obligation to incorporate such revisions in earlier models. < !!.. Q I 575 \I (Q) 200 MA ~~~6 REO/WHITE'j$"18 2 W R307 47K 2W r--------~~----:3 _ BIAS - 75 TO 14 0 II ~b~~ fa) 10 M A R309 WH ITE - IS 1001( 1/2 W 09 2-0 17843 LC'fl-..,-----j------+--------------------------j--04 SWITCH BLACK/ WH I TE *' 18 L-____ + _________________________ I---<>5 HTRS BROWN #'2 NOTES : I. C AUTIO N : OBSERVE POL ARIT Y. 2. THE WIRING SHOWN IS FOR NEGATIVE GROUNDED VEHICLE S . IF THIS UNIT IS INSTALLED IN vEH IC LE S HAV ING POSI TI vE GROU NDED BA T T ERI ES , L EADS MARKED 3 AND 4 ON TH IS SCHEMATIC MU ST 8E UNSOLD ERED AND INTER CHANGED SO THA T LEAD I CON NE C TS WITH LEAD 4 A N D LEAD 2 WITH LEAD 3 . r---/--o 6 8L ACK *, 2 07 ORANGE (S PARE ) *rB Figure 18. Schematic Diagram of Moclel PS·150·12 DC Power Supply. -25 - 08 9-0029 79 B SECTION XI MOBILE MOUNTING RACK MODEL MR-150 11-1. DESCRIPTION. Hallicrafters' Model MR-150 Mobile Mounting Rack is a sturdy, compact unit designed to facili tate mobile installation of the Model SR-150 Transceiver. This mounting rack, with mounting bracket and straps supplied, permits transmission hump, floor, and/or under dash mounting of the transceiver (see figures 4 and 5). This rack is equipped with a cable for con nection to the PS-150-12 Power Supply, an audio connector brought out to the side for connection to speaker, and provisions for a direct connection to a suitable antenna. The side panels of the mounting rack fit snuggly against the transceiver for a secure installation. Wing screws are supplied to attach the transceiver to these side panels. 092-017932 Figure 19. Hallicrafters Model MR-1S0 Mobile Mounting Rack. Details for installing this equipment in a ve hicle are described in paragraph 3-4 and in figures 4 and 5 of this handbook. J 401 n t}- REO/WHITE ·,8 ~ ~ 10 7 4 I RED'#'8 = r--= -c::::J ...... 1/ B 5 2 0 9 J I:l$l t::a 12 6 3 WHITE #,8 J402 ~ V BLACK / WHITE '#'B J BROWN ·,2 J403 NOTE I BLACK ·,2 cp / \ 0- - - - - -11 ORANGE'#'8 -=- - NOTES; THE AREA DOTTED IN SHOWS WIRING NECESSARY IF A COAXIAL CONNECTOR IS AFFIXED TO THE SIDE OF THE MOUNTING RACK AND INTERNAL COAXIAL CABLE ADDED BETWEEN THIS CONNECTOR AND J403. IF DESIRED. THE ANTENNA MAY BE CONNECTED DIRECTLY TO J403. ,...., I 2 3 4 S~ 6 7 U TO TS S02 ON PS-150-12.PINS 575V AS MARKED. (SEE FIGURE IT) 2S0V -9SV BIAS SWITCH FILAMENTS GROUND SPARE Figure 20. Schematic Diagram of Model MR-1S0 Mobile Mounting Rack. 089-003331 B - 26- REPAIR PARTS LIST FOR MR-1SO Bracket, Mounting Cable Assembly Clamp, Cable • Connector, Phone Type (Speaker) Connector, Power (12-pin) . • • Connector, RF Type (Antenna) Guide Pin ........... . Knob, Decorative, Wing-Screw (2) Pad, Side Bracket (Left) • Pad, Side Bracket (Right) • • Strap, Mounting (2) • • • • • - 27- 067-010870 087-007656 076-002744 036-000338 010-002585 035-000082 074-002792 015-001768 014-000475 014-000483 076-003202 '. NOTES: - 28- 15M Ll ---r--- , -- --- ----- -- - --- __ u _________ --- ___ n_ - - -- - ------ - - -(~;NO S~~~C~~R C-- - -- --- ------- -- - ---l VIA 1/2 6AZ8 RECEIVER R F AMPL VIB 1/2 6AZ8 100KC XTAL CAL V3A V2 TI J/26EA8 T2 V4 VI7A C47 C49 Ll5 1'j 82 R30 V6 12 BE6 PRODUCT DETECTOR R40 47K ~: ,'~ ~~U2 ,----T-,",," ,'12J)2 3 L711:LB;1~~L~9~~~CC';B~L~10~C~'9~L~" ~~~~~~~~, ~~ \"2~J~IJ:j'2l RECEI~~R~AiRRANSMITTER ,-___ ~,[~16-,·'"-~~~~l4- $6I~-~~~pML C r;c~-~+-~-_~~_6t=1~~,-M-C$--+--:---' RECIE~:E~ ~ IXER ~~; ~iS~~C 10 3 I 10 - I ~~C4 .-------.-L-6--------------. t~~Fti\CB51~RIOI C20 10 :,-h, ~ - 3- J C32E C,'2C '2 --3--.J C320 C,32B ~,----- SID 4 F~lgNT ~ l~~F ~~ R7 ~.~ cbY' ~~15:90K"1UUFI)J..~1~J~~5F SIF ;~L;;kC24 9 - ',- ". , lJ~F~R~0~NT~6~5~~~tM1~~==l-11B~~~~~U:U~F~~l~~~-~5 __ ~_2'___+_~15-K___i ~9 T'OOKC ~ FRONT6\i'::'::: 'I'J,';F 7 6.,c,~: __ 81~ o~~~f Tg~: -~-~~O~~ - -1;u;N~I-----: 6 :=; I [1; 46~2~~ C5 I C6 I CRI2 ~ 6\ ;:; ;~; :1 f.~ ~----1(_---------+__--~C23 C26 ~l3 Rll IL 2 ' 8665 - -- ~c'~6 I .. 2 - R23 C41 ...: -=-[ " C50 47 UUF r!~~~52~ I I UUF 15K L_ C51~ R29 0.011' 470K C59 10 UUF l;;*~62 rR41 ~C6~*~65 5 'to.001 lOOK ['0.01 --r0 .001 Itf~6 ; *' *' ~ -'I='- R5 CI3 R6 CI5 C 16 CI7 3900 07 I ~ ~ 15 K 000' '-'-- _ C7A C7D RI R2 R3 : ~~12 MEG- ""UUF ""UUF UUF Ll2lL----..:: UUF - 100 RI2 C28 RI3 RIG 0.01 Ria RI9 h C37 I ~~2[ R22~ C42;:[ R24 R26 U2U2Fl' u~9BOO IN456 h. 47K 0.005 7 I 5-25T125 100 tr---: gj' ~ 0~~ M H 47t27 - 3 ~ 7 C34 0.005 I - 3 2W 1'.... 7 [ I [80 l'O.005 6.0-6.5 ro1,2" C7B C7E UUf [00 001 [5K 220 [K d7OK: T~.02 I =22K 2200.0[1' O.Olt 41K lOOK MEG MEG MC Ul!F" -n:tJ,.. 2W ,,~ - I C46, ~ R28 0.01 r IK I C60 R37 t~70 47K ""UUF .". 20M 40M L2 1 ~~~ ~IUF -- BOM L3 L4 l' ¥~5r lLf ~3~ It, UUF 1 UUF 10M L~ CR I IN295 (/.". ~ ~ ~O~ t---------< R6 [Q£II \ TRAP ( T I - C39 l g~~1" gl~~ gg2 IRFGAINI ISOK [@ 1 I R: I : 1'0.01 ~"I P=R::-.. S:::E:::-~-=E:::CT::O:=lRI ______ +-_--l_I-_-_-_+-_-_-1_E-_-i _______________________________ :3 _____ ~ __ IPRESELECTOR I ___________ +[ _J_~~I:~!.':'--j:,r:=t=:t::j'::N- ~~4 :j.7K TAALC R AGC : : RI63 ... T: I R20 I 220K I ' 220K C6 10 UUF : ~Rl I I~ LP ~ T. - a5VDC R: GND - RI5 [K VFO OUTPUT : RF GAIN R F GAIN RF GAIN C36 39 UUF R25 C43 82 QOI T: 85VDC R:GND R3~,r 47K-b VI2 I 1650KC 1650KC 1650KC I C33 L~AG~C~ ____________ _l------------------------~~------------------~AG~C~------~_+----~-=======~========~======t==+==t=========~A&G£C~~=======+=====t======:t~~====~==~=+==AA~G£C====~====~=============t~~~~~~~====~-T~R~.A~N~SMM~IT~T~E~R~G~N~D~--------~ .. _~ [ 5 R95 ! ~OUF I .--__ --' 2500 OA2 REGULATOR CR'~, IN295 R97 8.2 clla M G 0.1 , __ r+~2~5~O~V~0~C:I~~~~~~~~~~~~~~~~~:t~~~~~~~~~~~~~~=t~=t~~~+~2=5=0~V~DC~~~~~~~~~~~~~~~~~i1--------------~rc~~~~~~~--------r_----1+~25~0~V~0~C ____ '_ ____ L_ __ ~~~:::_11--JE~----------------------------------_r+~2~50~V~D~C~ ____ _:~~~~--t1------~~--~'OW ISANDSELECTORI: _ _____ _ --r _______ fBA_NDSELECTORI _____ i C85p+150VDCREG: +150VDCREG ~~~ +150VDCREG G~iN Rr6 ~09K8 COMMON OR J 2 TRANS ONLY>--..--l\U-.+--------' 0.7 , ------------r---------:7-- R52! 12~h ~9 C61 R71 ~~3 II2:E9A~ FO : V9A L26 ~2i'iqC981~102 ~~~~. ~::~Ir=;V7iI7i0:====T=4~~1r-:::J~. itglgi ~8K8J I~F MEG 'd~! ~>n I 3 : !I~~ ~ 1.lf;~5 6 47K .-________ -;1..""" .......... ,,~ I 3 I... III ~2:=====::::;-1 ,i6::~~it I, ~:~ 4~ 7'. ~6 -f~~Q5 C~~ ~+-l~~~;~:--· ~g~if;::TH1~!-'F:-0-~-L-0-W-E-R---i-i __ _+I(-~~t-,~:c;:9S"":-7-"U-H~sl:!2'~9:O"; ~;; - . 0005 R60- ~5:3 ~2~~:~R 2F ___ -~ -"'L~: ~6-c-l-I-B~R~9:A76L;;o;,Ocr.01'6(~' [t"iR~~6~3 ~§~~K __ 5 6 g.~~1 ;Jll1m:99 50arL _MH SI' FRONT 1'0<-0'~4 , 10 :'-',,,4"--_________ -, , [] ~+'tf,--·--:!:-f-'---- [N295.j'< --- R74 C88 ITrU-N[-NG-I-J' '1'0GF 2-~ 3 C99 I-~ 25K 2700 -I ?r--- .ale: L 500K '='Jl'CI15A 47 19. :_,:- [ R49 1,),['7 ",g~;'5 9~1:6'5 n ~~6K?66 C78 6 220KT27 • ....::.7 1'0.001 ~1Qill OCI03 -,F.-----':I" CI06 0 '---------""*~[~gR~if fAFl R92 "_~30 IW ~7 6 5 R:4 I 47K ....------'8 ~~~R 1 UUF 3 LOu'/, 6 C82f _ ~UUF I 11 YIO} Bu-8? ~~ ?C 8 ~L?FO LYII VIIA-B-C4- l"UUF 4.7 ~ 220K 2 VI3350V t--I- " "470" I 1_ 10M 10M 10M 10M SIB 15M 20M 40M 80M C70T IC'7[ C721 Tcn C77± ~~2i RG7 R6SHCt-B-0--t-L-2-6-; 0.01 - g~tl _R67820 + ! &. L27 9UCU'~F3 ~;~ CUiU:' - 3:t R [ [E!l] I~~I.". R84 ClO~05 R87 _1~~L7 XJ~~ETECTOR MEG 6AQ5t, .". ~~2 ~~60 ~:6o: ~3~ g~TT RI~O 4;5~ *g~g05 FRONT R5~8 R6[~E R6~E JJF}JG~ SJF 0t~ ~'~F t'M'H 2201<,4JW 0.001 0.7 0 ,) S4 ,.IOOK ~~~ ~0~ lOOK,. RECEIVER RECEIVER I I - '---- ~ Ll7 L18 L19 L20 L2! 22K L22 18K L23 27K L24 - - l - MH Ca7 1c32A C90 C94 L30 ~~~ __ -+~ R85 RaG AUDIO CIIO~ C112IR93 C114~ AUDIO R46 J 5:t- - ~ /l4W 1/4W 114W I -12 I C89 12 910 ! CR4 R79 ~CIOI I :T ~ i 820 820 O.OIl" 4M.,7G 0.021"220K 5'00V ¥- IPHONESI 10K : CJ,fl' ~~go UUF '.J _JJF UUF UUF MH vloa 470K- :R:rt-I+++-0 1 - J3 ! CR3 ,. 'r .... ~ CI8.1~ USB -0-- I R F LEVEL I :, cfl2[ R53 r::::::Jfi3~ R54c:=Jfi4~ R55c:::Jfi5~ R56 R5fY~6c:::J R599 n7c:::J R60l F8c:::1 R63 r= r--?-","",,,,--~--t--.-' N_2_9_5.,,~ VFO I i:: T!1111t===l!==0=.0='='l'==C!==========~::::=====::::::::=:+:'5:0:VD:C=i:R:':G\t-_O_' _~f~~ T IK T IK T IK T IK IK 1 [K -=r IK .-=r IK .T' :y l I 1 1 I _ C911' 1~105K ~~5 0~89_~3 CORRECTOR K~' t6-1 :_LT4--'H-H+-----1+-----+-i--------------------------.., RFLEVEL DISABLE I *36.0MC *35.5MC 35.0MC *34.5MC ... 27.5MC 20.5MC 13.5MC 10.OMC . UUF = UUF r I .--~R~:A~V~C~_T~:~G~N~D~~--------+_------_+------------+------------------_4--_+~~~ R:16VDC T:1.5VDC R :16VOC T: 1.5 VDC R:16VDC T:1.SVDC R:16VDC T: 1.5VDC KEYING I PRESEL ECTOR I r - -, L341 147 I IIW L __ ...J CI27 CI2a CI29 l'JJ? t9u~I l'J3? ----, +250VDC --- -- ---I----r-- - ---- -----------, : I (BAND SELECTORI : CI35 100 t£132 UUF V 005 !Cl39 0.8-13 UUF NEUT KEYING VI6 12BY7A XMTR DRIVER 1 c'45r,1 C147-tlt CI4~W!t 18 ~L39 85~L40 135 L41 UUF UUF UUF KEYING KEYING +250VDC + 250 VDC +250VDC +150VDC REG I rs-R129 CIS! ~ -~14 66K 0001 RI31 250 RI33 470 RI32 220K CI65 0.22 LSB VISS USB 112 VISA RI44 1/2 VI9A VII D I/ZI2AT7 6TSA VOICE VOX BAL l:.tf3!~CR95 RI30 CR 10 RII~8 ~~ 3 lN295 2700 IN 87 VI7B ----" - CRll ±g[~J5 12AX7/EceS3 2ND MIC AMPL 3900 12AX7 IECGB3 1ST MIC AMPL AMPL RECTIFIER VI98 1/212AT7 RELAY TUBE V5B 1/2 6EAS AALC AMPL MI~~;~~~PL glgrl' l'gl~~ t-1-N .. 67-+-"-----::-:~-__,.C"'6R3-;:::::t=::!. ;~~~ ~I~~ 1/~~~A8 g~~~ rd6~ :l'CjlgB r--'""";~, Rl34 [8 '~1fUUF CATHODE 350V R[ 19 470 " R131 VOX RI53 330K R 113 82K RI23 t~-~-f-~-~-~-~-~-t-~-~'~~~~~~~~~~r~-:-~-~-=~~-~-=-~-~-~-~-~-~~1UF~~=B=A=L =4~7~Kt~4dJ FOLLOWER SENS 47K RI[5 RII6 METERIW 10K \ LSB \ \ LS LSB I RI47 RI5,~H~ Cl54 lOOK 820K R[20P USB \ USB \ \! B C166* ~ lOOK I MEG 0.01 ZERO 5DK ~,!~ , "!J; 0.001'" CI76 CI77 t---j(=+__-'T--l4-+ I MI 11'121 2 RI24-~~I\ 2 \ ~2d I I CI72 ;!:C[73 0001 001 I ~~'55" CRB CI57 .--c-- , .);.,0', .~02' I I CI67 6_7 0001 -~' "'U'OUOF ~'-~i _ ~ CR7 ~ 0-1 10 \ 3 2 2:.K 10 \~3 -, "-,_+---,,190"-0{ '0 ~ "- -: .. 9f'__ IN295 0.0.01 IN2951.' 0.22 9 ~ -- ~'~. '" 9 rl0~ RI40 ,r-g-'-g2-, t-"f-a RIl4 - a---·[ ~ ~~aT r9 7~ 4":g~k S5 9r[A;;4 l':g!a f.' ~ \ RI;: '6'" S6 6 --- ~I ··i -~--'-- --- 3 ~i: I Rlf2 3 IK RI11 1~1[8 RI21 RI22 FRONT REAR ~ I 1- REAR I \ lOOK FRONT RI38 RI39 R14! RI43 Rl46 RI45 RI48 CI74~RI5! MEG RI54 2.2 3300 820 3300 \. 4700~M~G 2200 _ I I 470 470K 5'Uc::.!IOOI( _ II( MEG :r \ MIC DISABLE MEG MEG RI12 470K ~ R157 6aK 2 3F- ,L·~·-~B~li~ RIGO ~-_--+ 1500 DELAY 10 I 80M ~---+-----------; CI24 L'. 0.7 MH CI34 0.001 C!44 3B~ l' L42 0.7 RI08 4700 Rill 270K CI53 0.001 PTT IFUNCTIONI , , pn PTT ~2) :or INHIBIT '---/ ~ RI5;-n~156 MEG MEG RI56 L33 0.7 MH , C~' UUF RIOO 2700 l.'~~~ RF LEVEL DISABLE MH +250VDC C 146 t----::R ... [0~7~------~t-C-,4-9.;.;;;.;;..;.;;..-+---' 0.0051' i~O l' 0.005 RF LEVEL DISABLE VOICE AMPL 6.2 CW BREAK-IN KEYING CW BREAI(-IN KEYING MEG RELAY ACTUATE RELAY ACTUATE R F LEVEL DISABLE R[OI CR61RI02 4700 el20 IN295 100 K 0.1 RI26 ~ __________________________________ ~XM~T~R~B_'A_S ____ R_._-9~5~VO_C ___ T_:-_5_5_V_0_C ______________________________ ~ ____ _4 ____________________________ _+----------~R~.--~95~_V~0~C~_T~:-~5~5~VD~C~ ____ ~33K BIAS DIVIDER RI27 56K ~nJ5 .r---w KEY - -, , C 118 0.221' + 575 VDC (WHT/RED) * CRYSTALS NOT SUPPLIED. ** SEPARATE ANTENNAS OR LINEAR AMPLIFIER WITH ANTENNA SWITCHING RELAY USE THIS POSITION. RESISTANCE MAY VARY FROM VALUE SHOWN. IF REPLACEMENT IS NECESSARY, USE SAME VALUE AS PART REMOVED. + 575VOC NOTES. UI\lLESS OTHERWISE SPECIFIED; ALL RESISTORS ARE IN OHMS - 10 Yo,1/2 WATT. ALL CAPACITORS ARE IN UF (SEE PARTS LIST FOR VOLfAGE RATING} I OPERATION SWITCH IS SHOWN IN OfF (FULL CCW) POSITiON FUNCTION SWITCH IS SHOWN IN CW(FULL CCW) POSIT[ON. 2 BAND SWiTCH IS SHOWN IN 3.5 Me {FULL CCWl POSITiON. 3. ALL FEEDTHRU CAPACITORS ARE IOOC UUF. BIAS SWITCHlNG R-95 VDC T: GNO R: -95VOC T: GND TO POWER SUPPLY Figure 21, Schematic Diagram of Model SR-150 Transceiver, Schematic Symbol Cl,18,145, 163 C2,19,147 C3,20,148 C4,24,25,143 C5,70 C6,23 C7A,B,C, D,&E C8,33,59, 76,108 C9,50,71 Description CAPACITORS 181l1lF, 5%, 500V, Plastic Mica 85 Illl F, 2%, 500V, Plastic Mica 135 IlIlF, 2%, 500V, Plastic Mica 151l1lF, 5%, 500V, Plastic Mica 22 IlIlF, 5%, 500V, Plastic Mica 3900 /lI.L F, 2'1'-, 500V, Plastic Mica Variable, PRESELECTOR 10 1"11 F, 5%, 500V, Plastic Mica 47 IlIlF, 20/" 500V, Plastic Mica Cl0,11,37, 000211 F, 20%, 600V, 55,61,112,117, Ceramic Disc 137,168,169, 170,171,179, 180 C12,13,29, 30,35,36,41, 68,69,75,79, 102,113,132, 133,146,149, 0.005 I" F, 20%, 500V, Ceramic Disc 150,151,162,167 C14,17,22,26, 100 IlIlF, 2%, 500V, 27,57,74,78, Plastic Mica 81,126,130, 135,136,173, 174 C15,164 C16 C21 C28,31,34, 39,40,42,43, 44,46,51,53, 54,56,64,67, 82,84,107, 110,152,154, 159,160,177, 181 C32A,B,C, D,&E C38 C45,47,49,62, 65,80,83,99, 111,116,134, 153,155,161, 166,172,176 C48 C52,72 C58,157, 165,178 C60,109 C63,100 C66,118, 120 C73 C77 C85,91,98, 101,156 C86 C87 CB8 C89 C90 C92 C93,94 C95 Variable, Trimmer, 51lllF to 251lllF 125 Illl F, 2%, 500V, Plastic MiCa 33 I'll F, 2%, 500V, Plastic Mica O.OIIlF, 20%, 500V, Ceramic Disc Variable, TUNING 39 Illl F, 2%, 500V, Plastic Mica 0~001 Il F, 20%, 500V, Ceramic Disc 361l1lF, 2%, 500V, Plastic Mica 821l1lF, 2%, 500V, Plastic Mica 0.22IlF, 10%, 200V, Paper Tubular 470IlIlF, 2%, 500V, Plastic Mica 5 11 F, 25V, Electrolytic 001 IlF, +80%,-20%, 100V, Ceramic Disc 1201l~F, 2%, 500V, Plastic Mica 6~8 Illl F, ±0,5 Illl F, 500V, Plastic Mica 1000 Illl F, GMV, Ceramic Feed-Through 3.3 ~Il F, ±0,5 1111 F, 300V, Plastic Mica Nil.e;;} 51 MIL F J 29;" N30, Ceramic Tubular 12 I'll F, 5%, N470, Ceramic Tubular 43 IlIlF, 2%, 300V, Plastic Mica 910 Illl F, 2%, 300V, Plastic Mica 181"1lF, 5%, 300V, Plastic Mica Hallicraiters Part Number 482-132180 482-161850 493-121350-334 482-132150 482-132220 482-361392 048-000526 482-132100 482-151470 047-100471 047-100442 482-161101 044-100473 493-121250-334 482-151330 047-100354 048-000522 482-151390 047-001671 482-151360 482-161820 046-001298-04 482-261471 045-000938 047-001428 482-161121 493-140680-531 047-001308 493-140330-521 044-000568 481-151270 491-024510-31 491-005120-83 481-151430 481-261911 481-132180 C96,139 Variable, Trimmer) 044-000520 C97 Cl03,106 008 I'll F to 13 Ill' F, 3000V (Piston type with hardware) 681'IlF, 2%, 300V, 481-161680 Plastic Mica Variable, Trimmer, 8 ~~F to 50 i"ilF 044-200437 SERVICE REPAIR PARTS LIST MODEL SR-150 Schematic Symbol Description Hallicrafters Part Number C104,105 C114 C115 A&B C119,123 C121 C122 C124 C125 CI27,128, 129 C131 C138 C140,141 C142 C144 C158 C175 R1,2,8,139, 143,146,149, 152,158 R3 R4 and 91, R46 and 140 R5,1l,17,24, 31,36,37,39, 40,49,52,77, 113,136,137, 159 R6,81 R7,27,30 R9 Rl0,38,43, 141 R12 R13,23 RI4,15,18, 28,33,42, 50,53,54,55, 56,57,59,60, 63,69,73,114, 128,154 CAPACITORS (CONT) 3301l1lF, 2%, 500V, Plastic Mica 10 Il F, 50V, Electrolytic 2 x 30 Il F, 350V, Electrolytic 0.001 Il F, 20%, 3000V, Ceramic Disc 51l1lF, ±0,51lIlF, 500V, Plastic Mica Variable, FINAL TUNING 220IlIlF, 2%, 500V, Plastic Mica 150 Illl F, 2%, 500V, Plastic Mica 390 IlIlF, 2%, 500V, Plastic Mica 0.01 Il F, +80%,-20%, 500V, Ceramic Disc lOOOIlIlF, 2%, 500V, Plastic Mica 510IlIlF, 2%, 500V, Plastic Mica 270 Illl F, 2%, 500V, Plastic Mica 680 Illl F, 2%, 500V, Plastic Mica 0.1 IlF, 10%, 200V, Paper Tubular 0.002 IlF, 20%, 500V, Ceramic Disc *RESISTORS I Megohm 180 Ohms Variable, Dual: 10K Ohms, 30%, 1 watt, RF GAIN and 500K Ohms, 30%, 1/4 watt, AF GAIN; 10K Ohms, 30%, 1 watt, RF LEVEL and 500K Ohms, 30%, 1/4 watt, MIC GAIN 47K Ohms 180K Ohms 15K Ohms 150K Ohms 2200 Ohms 100 Ohms 15K Ohms, 2 watts 1000 Ohms RI6,22,32 220 Ohms RI9,29,51,66, 470K Ohms 79,112,148 R20,34,64,67, 220K Ohms 74,92,93,94, 132,163 R21,65,124 22K Ohms R25 82 Ohms R26,35,41,75, lOOK Ohms 84,87,102,110, 115,125,135, 142,147,151, R44, 103, 133 134,145 R45 138 R58 E6! R62 R68 R70,83,100, 130 R71, 129, 157 R72 R76 R78 R80 R82 H85,86,121 R89,90 R95 R96,150 R97,156 R99 470 Ohms 1800 Ohms 10K Obms 4700 Ohms 22K Ohms, 1;·1 watt 16K Ohms, 1/4 watt 27K Ohms, 1/4 walt 4700 Ohms, 2 watts 2700 Ohms 68K Ohms 680 Ohms 2200 Ohms, 1/4 watt 27K Ohms Variable, 25K Ohms, 30%, 1/3 watt, CAL ADJ VarIable, 25K Ohms, 30%, 1/3 watt, RIT (Inc. S4) 820 Ohms 407 MEgohms 2500 Ohms, 5%1 10 watts 1 482-161331 045-000755 045-000902 047-100397 493-110050-531 048-000525 482-161221 482-161151 482-161391 047-100224 482-261102 482-261511 482-161271 482-261681 046-001294-04 047-100395 451-252105 451-252181 025-002063 451-252473 451-252184 451-252153 451-252154 451-252222 451-252101 451-652153 451-252102 451-252221 451-252474 451-252224 451-252223 451-252820 451-252104 451-252471 451-252182 451-2"2103 451-2521?2 45]" 152223 451,,152183 451-152273 451,,652472 451-252272 451,~25268:; 451 451-152222 451-252273 025-002061 025-002062 451-252821 451-252475 024-001467 025-0()2067 451-252825 451-352470 Schematic Symbol R104 Rl07 Rl09 Rll1 R116 R117 R118,122 R119 R120 R126 R127 R131 R144 R153 R155 R160 R161,162 Description * RESISTORS (CONT) 2700 Ohms, 1 watt 470 Ohms, 1 watt 47K Ohms, 2 watts 270K Ohms 820K,Ohms 2.2 Megohms 3300 Ohms 82K Ohms, 1 watt Variable, 50K Ohms, 20%, 0.2 watt, Meter Zero 33K Ohms 56K Ohms Variable, 250 Ohms, 0.3 watt, Balance 3900 Ohms 330K Ohms Variable, 10 Megohms, 20%, 0.2 watt, Delay 1500 Ohms 10 Ohms Hallicrafters Part Number 451-352272 451-352471 451-652473 451-252274 451-252824 451-252225 451-252332 451-352823 025-002065 451-252333 451-252563 025-002064 451-252392 451-252334 025-002066 451-252152 451-252100 * All RESISTORS are carbon type, 10%, 1/2 watt unless otherwise statecL Ll L2 L3 L4 L5 L6,13,16, 25,26,29, 33,36,42 L7,37 L8,38 L9,39 LlO,40 Lll,41 L12 L14,15 L17,18 L19,20 L21 L22 L23 L24 L27 L28 L30 L31 L32 L34,35 Tl,2 T3 T4,6 T5 Vi V7 V8,lO,19 Vll Via 1,'1.8 CR4 COILS & TRANSFORMERS Coil, Antenna, 15 Meters Coil, Antelma, 20 Meters Coil, Antenna, 40 Meters Coil, Antenna, 80 Meters Coil, Antenna, 10 Meters Coil, 0.7 MH RF Choke Coil, Mixer and Driver, 10 Meters COil, Mixer and Driver, 15 Meters Coil, Mixer and Driver, 20 Meters Coil, Mixer and Driver, 40 Meters Coil, Mixer and Driver, 80 Meters Coil, 600-MC to 605-MC Trap Coil, IF, Filter Termination Coil, Crystal Oscillator, 10 Meters Coil, Crystal OSCillator, 10 Meters Coil, Crystal Oscillator, 15 Meters Coil, Crystal Oscillator, 20 Meters Coil, Crystal Oscillator, 40 Meters Coil, Crystal Oscillator, 80 Meters Coil, VFO Coil, 27 IlH RF Choke Coil, 1 MH RF Choke Coil, Final Amplifier RF Choke Coil, Final Amplifier Pi-Output Coil, Parasitic Choke Assembly Transformer, Variable IF, 605 MC to 600 MC Transformer, IF, 1650 KC Transformer, BFO and Balanced Modulator OUtput Transformer, Output **ELECTHON TUBES & DIODES Typt: 6AZB Type Tyl''' 6EA8 Tube, Type 12BE6 Tube, TYVe 6AH6 Tube, Type 12AT7 Tube, Type 6TEA Tube, Type OA2 Tube, Type 6AQ5A Type Type Type 12AX7/ECCB3 Type lN295 lN87 CR12 Diode" Type lN456 051-003350 051-003347 051-003345 051-003346 051-003531 053-000530 051-003532 051-003349 051-003342 051-003340 051-003341 053-000665 050-000801 051-003353 051-003343 051-003529 051-003344 051-003530 051-003351 051-003509 053-000666 053-000580 053-200426 051-003348 053-000676 050-000786 050-000890 050-000881 055-000469 090-901417 ()90-901474 090-901350 090-900040 090-900793 090-000034 090-901403 090-900001 090-901331 090-901475 090-901192 019-301980 048-000464 019-002941 019-002964 ** See Seetion HJ Page 3 for Tube Functions, Schematic Symbol SI SIB,E SIC,D, F,H SIG SIJ S2 S3 S4 S5 S6 S7 Yl Y2 *** Y3 *** Y4 Y5 *** Y6 Y7 Y8 Y9 YIO Yll Description SWITCHES Rotary, BAND SELECTOR (Inc. SlA ONLY) Wafer, Crystal Oscillator and Transmitter Mixer Wafer, Antenna, RF Amplifier, Mixer, and Final Input Wafer, Driver Output Wafer, Final Pi-OUtput SPST, Antenna Rotary, CAL-OFF SPST, RIT-OFF/ON Rotary, FUNCTION Rotary, OPERATION (Inc. S7) SPST, POWER CRYSTALS 100 KC, Crystal Calibrate 36,0 MC, 10 Meters 35.5 MC, 10 Meters 35.0 MC, 10 MeterS 3405 MC, 10 Meters 2705 MC, 15 Meters 2005 MC, 20 Meters 13.5 MC, 40 Meters 1000 MC, 80 Meters 164801 KC, LSB 1651.7 KC, USB Hallicraiters Part Number 060-002442 062-000195 062-000196 062-000198 062-000197 060-100440 060-002555 Part of R82 060-002441 060-002443 Part of 86 019-002712 019-002940-08 019-002940-07 019-002940-06 019-002940-05 019-002940-04 019-002940-03 019-002940-02 019-002940-01 019-002945-01 019-002945-02 *** Not Suppliedo Jl,2,4 J3,5 J6 J7 FLI Ml DS! 1(2,3 Kl CONNECTORS Antenna (Receive and Common), 500-0hm Output PHONES and Key Microphone (lnco Hardware) Power Input (12-pin Jones type) MISCELLANEOUS Bristol Wrench (TUNING Knob) Cabinet Cable Assembly (Harnessed) Coupler, Solid Cover, Cabinet Bottom Cover, Cabinet Top Cover, VOX Relay Dial Window Disc, Dial (TUNING) Emblem, Hallicrafters Logo Escutcheon Escutcheon Plate Filter, Crystal Lattice Foot, Plastic (4) Front Panel Gear, Pinion Gear, Spur (Fixed) Gear, Spur Handle, Knob Iron Core (Coil Slugs) Iron Core (L27 Only) Knob, AF GAIN, MIC GAIN, and RIT (Round) Knob, BAND SELECTOR and FUNCTION Knob, CAL ADJ and CAL-OFF Knob, FINAL TUNING and PRESELECTOR NO. 1815 Pointer, TUNlliC and PHESELECTOR POinter, TUNING Dial Relay, RF Swilchmg and Antenna Relay, VOX Screw, Machine (TUNiNG knob spinner) Skirt, TUNll'iG Knob Spring, Anti-Backlash Switch Wafer Washer, TUNING 6'pinner 036-100041 036-200210 010-101569 010-002586 033-001071-11 150-003099 087-007664 029-100264 066-003141 066-003140 066-201460 022-000696 083-001012 007-000850 007-000812 007-000813 049-000216 016-201072 068-001174 026-001087 026-001088 026-001089 030-000793 003-203388 003-203305 015-001773 015-001760 015-001755-02 015-001690-21 Ol5-GG1T75 140,,01 083·001015 075-000841 052-()00205 426·003543 094-9032868 563 Printed in U.S.A.

Hallicrafters SR-150

Object/Artifact

Radio Alpha

Name/Title

Description

Category

Made/Created

Manufacturer

Date made

Valuations

Value

General Notes

Note