[Elecraft] K3: Problem with CM-500 plugged into front panel through AD1K

[Joe Subich, W4TV]

Make pin in the first sentence pin 1 ...


73,

    ... Joe, W4TV


On 1/21/2014 5:07 PM, Joe Subich, W4TV wrote:
>
> Use an Ohm meter and see if pin of the Foster plug is connected
> to the center pin of the 3.5mm jack on the AD1-K (DC connection).
> It is entirely possible that the adapter has a blocking capacitor
> as the AD1-K was designed for use with Heil's dynamic microphones
> which do not want DC on the mic element.
>
> 73,
>
>     ... Joe, W4TV
>
>
> On 1/21/2014 4:14 PM, Stan Rowe wrote:
>> Does anyone have any ideas why my Yamaha CM-500 microphone won't work
>> when
>> plugged into the front of the K3.  I am using the Kenwood AD1K adapter
>> and I
>> have the firmware set to select the front panel, low gain, with bias on
>> (FP.L bIAS).  The CM-500 headphones are plugged into the Phones jack
>> on the
>> front of the K3 and work fine.  The CM-500 mic plug (grey) is plugged
>> into
>> the corresponding jack on the AD1K.   When I press my footswitch, the K3
>> goes into transmit but there is no audio when I speak into the CM-500's
>> microphone.  I have tried the footswitch plugged in both on the back
>> of the
>> K3 and into the AD1K footswitch jack and it works fine (puts the K3 into
>> transit) in both cases.
>>
>>
>>
>> When plugged into the rear Phone and Mic jacks on the K3, the CM-500
>> works
>> like it should.  In that case I have the firmware set to RP.L bIAS.and
>> both
>> the CM-500 microphone and headphones work fine, so I'm quite sure the
>> CM-500
>> is not the culprit.
>>
>>
>>
>> It almost seems like the AD1K is the problem.
>>
>>
>>
>> This must be something simple, but I am stuck.  Any suggestions much
>> appreciated.
>>
>> Thanks
>>
>> Stan - K6VWE
>>
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