[Elecraft] AD-1-K doesn't have blocking capacitor, Heil claims

[Buck - k4ia]

Yes but. . .

The Mic pinout used by Elecraft is the Kenwood pinout.  So, you would 
use a Kenwood adapter with a Heil product.  Hence the issue with the 
blocking cap - unless Heil has now made available a mic adapter cable 
specifically for the Elecraft line.

Buck
k4ia


On 2/24/2012 2:53 PM, Dick Dievendorff wrote:
> Bob Heil just told me that only the ICOM Heil adapters have blocking
> capacitors.
>
>>> Of course NONE of the Kenwood or Yaesu have any blocking caps as none of
> their inputs have phantom voltage (thank goodness)
>
> Dick, K6KR
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Don Wilhelm
> Sent: Friday, February 24, 2012 11:32 AM
> To: Tom
> Cc: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Heil Proset Headphones
>
> Tom,
>
> Since you have the Icom adapter now, I must ask - Is that a Proset-Ic?
> You can find the "Ic" designation in the end of the microphone tube that
> attaches to the earphone.
> If it is an "Ic" type, it has an electret microphone element which requires
> bias.
> I believe the Kenwood adapter has a blocking capacitor that will prevent the
> bias voltage from reaching the mic element.
> If you are using this with a K3, just plug it into the rear panel jack, no
> need for an adapter.  If you are using it with the K2, rewire the Microphone
> Configuration Header to match your Icom adapter.
>
> 73,
> Don W3FPR
>
> On 2/24/2012 1:58 PM, Tom wrote:
>> I have the headset with the adapter for my Icom 756Pro.  Which Heil
>> adapter do I need to use the headset with the K3? AD-1-K?
>>
>> Tom
>> KQ5S
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