[Yaesu] Electret mic on 990?

[Jim Parsons]

Brian, I used an electret mike with the Yaesu FT-1000 for years and got
outstanding reports. I used the little Radio Shack unit that sells for
$2.99. As the FT-1000, like the FT-990, does not supply voltage for the
OP-AMP in the mike, I used a little Radio Shack box, a "D" cell battery
holder, and suitable plugs on each end of the box. One end went to the mike
plug on the FT-1000, and the other end went to the mike. The battery was
connected across the battery wires of the mike, and was just 1.5 volts
(single cell). The little mike button was put in a mike case that I had
laying around.

This has worked great for me right up to a few days ago when I sold the
FT-1000. The audio reports were always outstanding, and the other station
was usually amazed that I was using a RS 2.99 mike. I strongly recommend
it, as the input to both the FT-1000 and the FT-990 are the same, as far as
I know.

Best 73,

Jim, K5ROV


At 08:34 PM 10/12/97 +0000, you wrote:
>Anyone have experience getting an electret mic working w/a 990?
>The mic needs a voltage across its leads to work, but there isn't one
>on the 990's mic pinout. Even if I supply 1.5v isolated from the rig w/
>a cap I still get nothing.
>
>Related topic - are the Heil mic's on the headsets electret?
>
>Tnx es 73!
>
>Brian n8wrl
>
>
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James (Jim), Parsons, K5ROV USAF, Ret.
k5rov@worldnet.att.net   QCWA, NWQRP, Fists, ARRL
EX: W1RLA, K5FBB, K4FEO, SV0WN (CRETE), SV0WN (RHODES),
DL4NC, DL4JP, KA2FC (JAPAN), KA2JP (JAPAN).
JOHN 3:16


--
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