Note
Note that Simpson Electronics is not the same as Simpson Electric (maker of the model 260 VOM, et al).
Simpson Electronics of Miami, Florida was a well-known manufacturer of marine communications gear. Their FM transceiver for the 2 meter amateur band had four crystal-controlled channels. Transmit and receive frequencies were selected independently using diodes to switch the crystals. The Model A's power output was 6 watts ($249.00, 1971 ). Simpson's push button-controlled Model B two meter transceiver was based on one of the company's VHF marine radios.
he 6-watt Simpson Model A features four channels, sensitivity of 0.6 uV for 20-dB quieting and separate plug-in transmitter and receiver boards with easy access to all tuning and metering points. The solid-state design uses integrated circuits and diode frequency switching.
The squelch is fully regulated and compensated with squelch sensitivity at 0.25 pV or less.
Intermodulation interference rejection i s 70 dB minimum.
Spurious response attenuation is greater than 60 dB.
Selectivity, furnished by ceramic filter: 13 kHz at 6 dB down and 36 kHz at 60dB down.
Audio output is 2 watts with less than 10% distortion.
Current drain on receive: squelched, 250 mA; unsquelched, 480 mA.
The transmitter has ±5 kHz deviation for 100% modulation at 1 kHz and includes instantaneous automatic deviation limiting.
Transmitter audio response is +1 dB to -3 dB from 300 to 3000 Hz.
Tuning range is 144 to 148 MHz.
References
Brief description. Electronics World, May 1971, p. 83.
Review. Popular Electronics, Aug 1971, p. 84.
Review: QST, Oct 1971, p. 58.