K3: No modulation from front panel mic jack

[Bob Scott-2]

This is a fairly new K3 and I am finally getting around to checking it out after what I thought was an uneventful assembly.

CW works fine. Have not tried data.  However, SSB from the front jack does not work.  I am using Elecraft MH-2 microphone.  MIC SEL is set to FP.L bIAS.  Microphone works fine on my K2.

Have also tried a Heil HM-4 with what I believe is the proper adapter.  I can key the transmitter, but once again no audio.

I plugged a gaming headset into the back and got some audio, but I can't speak for its quality.

Does anyone have tips on what I could look at or further testing?

Thanks and 73,

Bob
W4ZY
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[KK7P]

Verify the 5-pin connector between the DSP PCB and the FP PCB are
mated.  This is located near the headphone jack, mic jack and concentric
pots. It is very easy to have the male pins slide next to the female
receptacle rather than engage.

73,

Lyle KK7P

> ... However, SSB from the front jack does not work.  I am using Elecraft MH-2 microphone.  MIC SEL is set to FP.L bIAS.
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[Bob Scott-2]

They could and they did.

Thanks very much Lyle.  I'm glad it was nothing more serious.

73,
Bob
W4ZY

On Oct 29, 2011, at 2:49 PM, Lyle Johnson wrote:

> Verify the 5-pin connector between the DSP PCB and the FP PCB are mated.  This is located near the headphone jack, mic jack and concentric pots. It is very easy to have the male pins slide next to the female receptacle rather than engage.
>
> 73,
>
> Lyle KK7P
>
>> ... However, SSB from the front jack does not work.  I am using Elecraft MH-2 microphone.  MIC SEL is set to FP.L bIAS.

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