Login  Register

K3S Kit issue - Does not transmit in SSB

Posted by VE8EM on Jul 31, 2017; 5:11pm
URL: http://elecraft.85.s1.nabble.com/K3S-Kit-issue-Does-not-transmit-in-SSB-tp7632922.html

Good day,

I am adressing this issue to this forum as I am puzzled and don't know what to do.

Basically, I assembled my K3S kit about a month ago, no issues with the build and initial testing. I have done all of the required calibration and even the RF Gain calibration using the XG3 signal generator.

Everything worked out fine, I was able to receive signals and hooking up my paddle I was able to transmit in CW. Since I have the TX Monitor option, I was able to see the signal and power output on the P3 display.  I did put back the radio in his box and put it aside for about a month as I was busy with other family issues (i.e. a new baby).

I pulled back the radio last week as I wanted to play with the digital modes, after fiddling with the settings I was able to hook up the computer and the radio using the USB cable to use the internal sound card and control. I am able to receive signals on my computer, I can see the received signal on the computer display so I have no doubt that the sound card drivers are working. I configured the software to control the radio and when I start to transmit using the software, the radio turn into transmit mode and the TX red LED lights up. However, looking on the P3 Display using the TX Monitor, I see no signal being transmitted, if I increase the Monitor volume, I hear a hissing sound and there is no power output.

Since I initially thought this was caused by a setting, I hooked up the MH2 microphone and pressed the PTT, the TX LED lights up, but when I speak in the microphone, no signal appear on the TX Monitor, same hissing sound when I increase the Monitor Volume and no power output.

Does anyone have faced such an issue?   Any idea what is wrong?    

I have assembled many kits helping other people (K3, K3S, KX3, PX3) and never faced any issue but for my kit, I dont get it.

Thanks in advance!

Etienne Marcoux
VE8EM