Note
QST, Jul 1978, p. 93.
QST, Mar 1979, p. 181. (FT-7B 100 watt version of the FT-7)
QST, Jun 1979, inside back cover. (good photo)
QST, Sep 1979, 114.
QST, Mar 1980, p. 41.
The FT-7(B) is an all-solid-state HF mobile transceiver covering 80 through 10 meters. The compact unit is engineered for convenience during mobile operations and operates directly from a 13.5 VDC power source.
Features
– Operating Modes: USB, LSB,, CW, (AM, FT-7B)
– TUNE Control: A single-knob TUNE control allows for peaking of all transceiver circuits, which eliminates the need for inconvenient plate and load controls.
– Adjustable Power (FT-7B): The transmitter's final amplifier input power can be adjusted up to a level of 100 watts.
– Noise Blanker: It includes a built-in, high-performance noise blanker designed to minimize impulse-type noise commonly found in mobile environments.
– Built-in Tuning Aids: The transceiver features a built-in 100 kHz crystal calibrator and receiver offset tuning (clarifier).
– CW Enhancements: For CW operation, the unit provides an audio peak filter as well as automatic semi-break-in with a sidetone monitor.
– Receiver Circuitry: The receiver front end uses MOS FET and Schottky diode circuitry to ensure maximum sensitivity and immunity from overload.
– Digital Display Option: The transceiver is compatible with an optional YC-7B outboard digital frequency display.
Specifications
Frequency Coverage
80m: 3.5-4.0 MHz
40m: 7.0-7.5 MHz
20m: 14.0-14.5 MHz
15m: 21.0-21.5 MHz
10A: 28.0-28.5 MHz
10B: 28.5-29.0 MHz
10C: 29.0-29.5 MHz
10D: 29.5-29.9 MHz
Receiver
– Sensitivity: 0.25 µV for S/N 10 dB.
– Image Rejection: Better than 60 dB for 80-15 meters, and better than 50 dB for 10 meters.
– IF Rejection: Better than 50 dB.
– Selectivity: 2.4 kHz (-6 dB), 4.0 kHz (-60 dB).
– CW Audio Peak Filter: 80 Hz (-6 dB), adjustable.
– Audio Output: 3 watts at 10% THD.
– Audio Output Impedance**: 4 ohms.
Transmitter
– Emission: SSB, CW, AM.
– Input Power (FT-7): 20 watts DC for SSB and CW
– Input Power (FT-7B): 100 watts DC for SSB and CW; 25 watts DC for AM.
– Carrier Suppression: Better than 50 dB below rated output.
– Unwanted Sideband Suppression: Better than 50 dB at 1000 Hz.
– Spurious Emission: Better than -40 dB.
– Distortion Products: Better than -31 dB.
– Transmitter Frequency Response: 350-2700 Hz (-6 dB).
– Frequency Stability: Less than 300 Hz drift from a cold start, and less than 100 Hz drift over a 30-minute period after warmup.
– Antenna Output Impedance: 50 ohms nominal.
– Microphone Input Impedance**: 500 ohms nominal.
Power Requirements:
FT-7: 13.5 VDC ±10 at 3 amps transmit, 400 mA receive
FT-7B: 13.5 VDC ±10% at 10 amps transmit, 600 ma receive.
References
Review. QST, Mar 1980, p. 41.
