Steve,
The subject of electret mic bias has come up before, and your statements
below are incorrect --
Please look at the microphone connector in the manual (page 13), and
interpret the designation for pin 6 literally. It is *not* marked
"bias", it is designated "+8 V (10 ma max)".
"Bias" is what is applied to the microphone element - and that is
accomplished by adding a DC voltage onto the AF line - pin 1. That is
quite different than a raw source of +8V.
The Heil Kenwood adapter has no connection to either pins 5 or 6. The
Heil Kenwood adapter connects the mic element to pin 1, and the K3
applies bias to pin 1 if the menu is set correctly.
73,
Don W3FPR
n4lq wrote:
Wow. It would be interesting to know how that managed to work. The IC
means the headset is wired for ICOM then with a Kenwood adapter to an
Elecraft mic. jack with the bias on the wrong pin. (8) instead of (5)
as etc.
I'm glad it works but not sure why.
Steve Ellington
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