[Elecraft] K3 & Heil HM-10 Dual

[john at kk9a.com]

If you use an electret with no bias you have no audio.  What happens if
you use a dynamic mic with bias on such as the HC4/HC5 element in the
subject line?

John KK9A

From: Don Wilhelm
Tue Apr 18 07:35:33 EDT 2017

"Rule of thumb" - if the microphone produces any audio at all with no
bias, it should be run with no bias - it is a dynamic type.
Electret elements will not produce any audio at all unless bias is
turned on.

73,
Don W3FPR