[Elecraft] K3S Kit issue - Does not transmit in SSB

[George Thornton]

I would start by bringing your tests down to the basics and eliminating any possible computer software configuration cause.

I would first re-load the firmware and re-run calibration.

Assuming those all work correctly, the next issue is to properly configure the microphone settings.  There are several things that have to be correct, including where the microphone is connected (rear or front), the nature of the microphone, any bias and the proper microphone power setting (hi or low).  Read the manual and follow the instructions.

If you are still having problems, test with another microphone to make sure the problem is not with the mic.

If none of those work I would call the factory for further guidance.  They are excellent at diagnosis and are very helpful.



From: elecraft-bounces at mailman.qth.net [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of VE8EM
Sent: Monday, July 31, 2017 10:12 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] K3S Kit issue - Does not transmit in SSB

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




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