[Elecraft] K3 Rear Panel Microphone Jack Bias Voltage

[paul alexander]

Fred--

That thought also occurred to me at the time.  Bias voltage appears on
neither tip to sleeve or ring to sleeve.

Thanks.

Paul
wb9ipa

On Mon, Apr 27, 2009 at 10:49 AM, Cady, Fred <fcady at ece.montana.edu> wrote:
> Note that the Bias (+8 v) appears on the tip, not the ring, of the rear
> panel jack.
> 73,
> KE7X
>
> Fred Cady
> fcady at ieee dot org
>
>> -----Original Message-----
>> From: elecraft-bounces at mailman.qth.net
>> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of paul alexander
>> Sent: Monday, April 27, 2009 4:57 AM
>> To: Steve Ellington
>> Cc: elecraft at mailman.qth.net
>> Subject: Re: [Elecraft] K3 Rear Panel Microphone Jack Bias Voltage
>>
>> Steve--
>>
>> I tried just inserting a bare plug into the jack, with no microphone
>> wires attached and measured no bias voltage on the rear jack.  One of
>> my first thoughts was that the microphone had a short in it, but, that
>> was not the case.
>>
>> Thanks for the suggestion.
>>
>> Paul Alexander
>> wb9ipa
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