WRL-70 Speech Amplifier-modulator
Circa 1941
WRL-70: speech amplifier-modulator; Ad: APR 40 QST; price
$25.00; 40 watts (capable of modulating 80 watt transmitter);
6SJ7 speech amplifier, 6N7 driver, push-pull 6L6G modulator.
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WRL-70: speech amplifier-modulator;
Ad: APR 40 QST; price
$25.00; 40 watts (capable of modulating
80 watt transmitter);
6SJ7 speech amplifier, 6N7 driver, push-pull
6L6G modulator.