[Elecraft] Heil headset with HC-4 revisited

[Don Wilhelm]

Bert,

When using a mono plug in the KX3 mic jack, turn off BIAS and also set 
MIC BTN to OFF.

Alternately, use the splitter recommended by Walter Underwood - if using 
that splitter, turn MIC BIAS on.

73,
Don W3FPR

On 5/14/2020 2:15 PM, Bert wrote:
> The original Heil headset with the HC-4 element didn't work with the KX3.
> 
> I have now replaced the HC-4 with an electret, which sounded
> great trying it with the KX3 before installing it in the Heil headset.
> The electret, by itself, was plugged in to the KX3 with a stereo plug.
> 
> After electret installed in the headset I have quite a lot of hum. The
> headset mic is connected with a mono plug to the KX3.
> 
> Any ideas why the hum appears after mounting the electret in the headset?
> 
> Bert VE3NR
> 
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