Note
QST, Oct 1970, p. 134.
QST, Jan 1971, p. 137.
QST, Feb 1972, p. 119.
QST, Feb 1973, p. 136.
One of several models ranging to up to $34.95, but this was the only shown or described.
RP Electronics manufactured their RPC-3 speech compressor in Champaign, Illinois. Its low distortion circuit used bipolar transistors and FETs. The RPC-3 provided a 5–10 dB improvement in talk power.
