开云体育

在 2024年9月22日，20:06，Adam Rong via groups.io <rongxh@...> 写道：

?Guys,

CPK-4 can work with a SSB receiver to make a complete station. If you just have an AM radio receiver, you can consider 2 CPK-4. Photo:



Take 7030 kHz as an example, you can tune your AM radio receiver to 7030 first. You can use the whip antenna or a separate wire antenna. You should hear no CW signal. Power up one CPK-4, set the jumper to GND and fune tune the trimmer capacitor to keep it oscillating at 7030.7 kHz. Adjust the distance between this CPK-4 and the AM radio receiver to receive some signal. If you put them too close, the AGC will suppress the incoming signal too much, so you should put a bit far away so you can hear the signals in some background noise.

Now, you can power up another CPK-4 as TX. Set the jumper to KEY, fine tune the trimmer capacitor so you can transmit on 7030 kHz and connect a dedicated resonant antenna for TX.

Now, it is ready to grab some QSOs!

Thanks,

Adam