[Elecraft] K3 Mic connector options

[Joe Subich, W4TV]

 >  MIC+LIN is set to On for all modes.

*WHY* would you enable Mic+Line?  Use Line for data modes and either
FP.L or RP.L for voice modes.  That way you will not get mic noise in
the digital modes.

73,

    ... Joe, W4TV


On 5/16/2013 7:35 PM, Bill Frantz wrote:
> I have been trying to get my CM500 headset running with my K3. Using the
> MH2 mic plugged into the front panel with MIC SEL to FP.L bias in the
> voice modes (AM, FM SSB, & CS) while MIC SEL is set to rP.L bias for the
> DATA modes. MIC+LIN is set to On for all modes. This setup works well
> using VOX for transmitter keying in DATA and manually turning VOX off
> and using PTT when I run voice modes. (I'm mostly a DATA A and AFSK A
> operator.)
>
> If I plug the microphone from the CM500 into the rear panel of the K3,
> and change MIC SEL to rP.L bias, this division between voice modes and
> data mode no longer works. Noise in the shack keys the transmitter, and
> I assume is added to the output signal -- not good.
>
> So, my current plan, unless someone says, "Hey Dummy!", is to build an
> interface box which plugs into the front panel MIC connector to route
> the audio from the CM500 to the K3. I can include a jack for a foot
> switch to do PTT and set it up so the MH2 is also available. (Thanks Don
> for the pointer to Universal Radio for the Mic connectors.)
>
> My questions are: What to do with the other 3 lines? I can add buttons
> to UP and DOWN lines to provide another way for tuning the radio, but
> what does the FUNCTION line do? And, can I parallel the Mic audio from
> the CM500 and the MH2 or would it be better to switch them? (Fewer
> switches and modes will make my wife, KI6SLX happier.)
>
> Cheers - Bill, AE6JV
>
> -----------------------------------------------------------------------
> Bill Frantz        |Security, like correctness, is| Periwinkle
> (408)356-8506      |not an add-on feature. - Attr-| 16345 Englewood Ave
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