Sounds good let us know how it work's 



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BRETT WINCHESTER
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208-639-8386
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-----Original Message-----
From: For blind ham radio operators
[mailto:[log in to unmask]] On Behalf Of Colin McDonald
Sent: Sunday, June 03, 2007 7:12 PM
To: [log in to unmask]
Subject: headsets for ht's

Something i have thought of doing is using a good quality PC headset,
such as the one i have, senheiser pc130, and using it on the ic t90a.
I would have to built a small power pack to supply voltage to the
microphone cartridge in the headset, but as far as i can tell, the
impedance match should be very close.
I wonder what the collective opinions are regarding this kind of setup
are on the list?
I suspect the microphone cartridge wouldn't have enough output to drive
the radio's mike amp, but perhaps an extra tripple A battery or extra
watch battery in the power pack would solve that issue.
I could likely use 1.5V watch batteries, since the headset microphone
shouldn't require much current to operate for long periods of time, and
it really only requires 1.6V or so to work.  So, a pair of small
batteries in series should supply around 3V, plenty of voltage to keep
the mike hot.

73
Colin, V A6BKX