[Elecraft] K3 Rear Panel Microphone Jack Bias Voltage

[Cady, Fred]

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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