Note
QST, Dec 1976, p. 2.
Ham Radio, Jul 1978, p. 5. (shown with only one mic connector)
The ICOM IC-245 is a mobile, flexible, and compact 2-meter transceiver covering the 144–148 MHz band. Powered by a proprietary ICOM CMOS LSI multi-function chip, it features dual VFO capabilities, an LED digital continuous tuning system, and an automatic recycling feature. While primarily a 2-meter FM transceiver by itself, it can be combined with a sideband adapter (IC-245SSB) to become a multi-mode unit supporting USB and CW. It also features a MOSFET RF amplifier, specially designed mixer circuit, and helical cavities to overcome nearby strong signal interference.
Specifications
– Semiconductor Complement: 47 Transistors, 8 FETs, 24 ICs (including LSI), 61 Diodes.
– Frequency Range: 144.0 MHz to 148.0 MHz.
– Frequency Stability: Within ± 1.5 kHz at temperature variation from -10^circC to +60^circC.
– Mode: FM (F3); SSB (A3J USB), CW (A1) (with SSB adaptor).
– Antenna Impedance: 50 ohms unbalanced.
– Frequency Range: 144.0 MHz - 148.0 MHz (Continuously variable; digital 2 VFO system included).
– RF Output Power: SSB 10W (PEP), CW 10W, FM 10W.
– Type of Modulation: FM variable reactance frequency modulation.
– Maximum Frequency Deviation (FM): ± 5 kHz.
– Spurious Level: Lower than -60 dB.
– SSB Carrier Suppression Ratio: More than 40 dB.
– Microphone: 600 ohms dynamic microphone with push-to-talk switch (IC-SM2 electric condenser microphone usable).
– Frequency Range: Same as transmitter.
– Receiving System:
SSB, CW: Single Super Heterodyne (SSB adaptor attached)
FM: Double Super Heterodyne
– Intermediate Frequency:
SSB, CW: 10.7 MHz
FM: 10.7 MHz, 455 kHz
– Sensitivity:
FM: 0.5muV at (S+N)/N 10 dB or better
SSB, CW: Noise Suppression Sensitivity 20 dB, 0.6muV or less
– Squelch Sensitivity (FM): 0.4muV or less.
– Spurious Sensitivity: -60 dB or better.
– Selectivity:
SSB, CW: ± 1.2 kHz or better at -6 dB; ± 2.4 kHz or better at -60 dB
FM: ± 7.5 kHz or better at -6 dB; ± 15 kHz or better at -60 dB
– Audio Output: More than 1.5W (into 8,Omega).
– Audio Output Impedance: 8 ohms.
Power requirements: DC 13.8V ± 15%.
Grounding Polarity: Negative ground.
Power Consumption (at DC 13.8V):
Reception (at minimum AF volume): 0.6A
Reception (at maximum AF volume): 0.8A
Transmission at SSB (PEP 10W): 2.8A
Transmission at CW (10W output): 2.8A
Transmission at FM (10W output): 1.4A
