Bill,
I would suggest that you can obtain a Heil Kenwood adapter that is used
for the Elecraft ProSet-K2 (I forget the exact Heil designation) that
will allow you to connect the CM500 mic - you will also need a 1/8 inch
stereo female to 1/4 inch male adapter to match the headphone jack on
the adapter.
If using that adapter, you would need to unplug the MH2 and plug in the
CM500 (with the adapter) and adjust the mic gain.
OTOH, If you want to construct a box with a switch, that will work too.
In any case, I would suggest you turn off MIC+LINE unless you are also
using a computer to send pre-recorded messages.
When you switch to digital modes, the "mic sel" should be set to LINE IN
only - the audio input settings for SSB and digital modes are
independent in the K3.
73,
Don W3FPR
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
www.pwpconsult.com |ibuted to Andrew Tanenbaum | Los Gatos, CA 95032
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