On 11/7/2020 3:42 PM, Bill Frantz wrote:
...
The packaging said (in part), "Dynamic Microphone for Active
Musicians". And specs: Operating range: 100-16000 Hz, Sensitivity
-56dB 3dB (-36 dB 3dB V/Pa). Pattern: Uni-directional (cardiod).
I plugged it into my K3 and it worked as a direct replacement for the
old one. When I turned microphone bias off in the menu it stopped
working. By turning bias back on it started working again. (BTW, the
Elecraft radios may be the only gear I own that doesn't automatically
provide bias power.)
The fact that bias is needed confirms that the "key element" is an
electret. Ignore the packaging statement about dynamic, which has been
wrong for a couple of decades. The original CM500 did have a dynamic
element, but a change was made for reasons not in evidence. Someone
forgot to tell the marketers and packaging folks.
Gus Hansen
KB0YH
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