Note
Ham Radio, Aug 1972, p. 47.
QST, Oct 1972, p. 156.
QST, Mar 1973, p. 137.
QST, Jan 1974, p. 149.
The SCA-RPT-1 is a completely packaged repeater system including 10 watt transmitter, receiver, adjustable carrier-operated relay, time-out timer and remote control.
The repeater is designed for 12-VDC operation; current drain is 400 mA on receive and 3 amperes during transmit.
Accessories include tone squelch and a 117 VAC power supply.
The transmitter features rf output of 10 watts and frequency stability of 0.0005%. Frequency deviation is ±5 kHz, adjustable to ±15 kHz. Spurious outputs and harmonics are 55 dB below the carrier.
The built-in carrier-operated relay is adjustable from noise level to 20 dB quieting sensitivity plus 10 dB. Carrier delay is adjustable from 0.1–10 seconds, and the time-out timer is adjustable from 0.1–5 minutes. An input is provided for automatic identification.
The sensitivity of the receiver is 0.5 uV minimum (20 dB quieting method). Squelch threshold sensitivity i s 0.3 uV minimum. Adjacent channel selectivity at 30 kHz is 90 dB, while spurious and image rejection is –80 dB. Audio output is 5 watts; an auxiliary local speaker is optional.