The transceiver tunes a 40 kHz section of the 40 meter CW band.
The power of the transmitter is adjusted to 500 mW.
The selectivity of the receiver is provided by a homemade 3-pole crystal filter of the lower side band ladder type.
The bandwidth is 400 Hz and the rejection of the undesired side band is about 60 dB.
A good working T/R switch switches automatically from receive to transmit by pressing the key.