Homebrew 40m CW Transceiver

Freq. range7.000 - 7.030 MHz
RX partSuperheterodyne with RIT and side tone
RF/LO-OSC/MIXTA7358AP (IC originally for FM front-end)
LO-OSCsuper VXO with two 11.5412 MHz X'tals
IF filter3-element 4.5MHz HB ladder X'tal filter, BW=400Hz
IF amp.2SK168
IF amp./Detector/BFOTA7358AP
AF amp.TA7359P(dual OP-amp.) and LM386
TX part
Carrier-OSC/MIXTA7358AP with offset freq.
Buffer amp.2SK168
Driver amp.2SC2055
Final amp.2SC1969
Output power3 Watts with 7.5 Volts 1.0 Amps
T/R switch
Full break-inTwo PIN diodes Back-to-back in RX antenna and audio mute with 2SK168

MINOWA, Makoto
Last revised 1997-09-01.