[Elecraft] KX3 Bias Voltage

[Walter Underwood]

According to the Fred Cady book, the mic bias on the tip is +3.3 V. 

The ring has a different voltage, used for PTT and UP/DOWN. That voltage is not as clean as the mic bias. It is better tot split that out. You can do that with an off-the-shelf stereo to mono splitter. See this blog post for details.

https://observer.wunderwood.org/2015/08/16/yamaha-cm500-headset-with-ptt-on-elecraft-kx3/

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Jun 22, 2022, at 7:23 PM, John Pierce via Elecraft <elecraft at mailman.qth.net> wrote:
> 
> What is the bias voltage provided?  Is there a current limitation?
> 
> 
> 
> AD2F  John
> 
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