Homebrew 20m CW Transceiver


Freq. range 14.000 - 14.090 MHz
RX part Superheterodyne with RIT and side tone
RF amp. 2SK192A
MIX SN16913
LO-OSC 2SC2458, super VXO with two 11.059 MHz X'tals
Frequency doubled
IF filter 4-element 8MHz HB ladder X'tal filter, BW=500Hz
IF amp. Two 2SK210's
Detector SN16913
BFO 2SC2458
AF amp. LM358 (dual OP-amp.) and LM386
TX part
MIX SN16913
Carrier-OSC 2SC2458 with offset freq.
Buffer amp. 2SK168
Driver amp. 2SC2053
Final amp. 2SC1969
Output power 3 Watts with 7.5 Volts
T/R switch
Full break-in Two PIN diodes Back-to-back in RX antenna and audio mute with 2SK168