Be careful with that statement about Heil microphones. The ones for
Elecraft and Icom have electret element and need bias. There is one
newer Heil element that is electret - I can't recall its designation.
Yes, most Heil microphones are dynamic, but there are many exceptions.
Simply saying the microphone is a "Heil" is insufficient, one must be
explicit about the exact model and the adapter used.
73,
Don W3FPR
On 7/27/2014 7:57 PM, Hisashi T Fujinaka wrote:
Well that was the problem! I wonder why I thought it worked before.
The reason I changed the jumper is because of the RemoteRig users
manual, that says:
Control-RRC only: JMP-1 is placed behind the TTL connector. With the
strap in place a DC voltage is feed to the microphone element. All
ICOM microphones should be DC-feed.
Dynamic microphones like the ones used by Kenwood should not be
DC-feed. HEIL microphones should not be DC-feed either.
Maybe they just mean the desk microphones.
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