Hi! Martin.
I have an Icom IA 200 and for some reason (can't remember what now) I
had a Sigtronic SPA 400 T50 voice activated Intercom fitted. This part
of the system works fine, however the Icom unit gives me great
frustration in that the Automatic Squelch takes out the incoming signal
with all unwanted noise. The only way I can communicate with ground when
at medium and long distances is to use the Test Button which completely
dumps the squelch control. I have had numerous attempts and specialists
attempts to improve it, I have been advised to try 1/4 turn clockwise of
the Auto Squelch adjust screw, there is a very slight improvement, but
generally it isn't fit for purpose. UK Authorities will not accept new
installations with it. The radio was set to a WSWR meter by a
professional to the dipole aerial of Bob Archers notability complete
with the requisite ferrite balons etc. and also a pucker Air World
aerial has been fitted with an adequate ground plane with little or no
improvement. There is an Aluminium shield between the Panel and the
firewall, the carb /throttle cable has been grounded as also the
complete radio stack, the engine compartment painted out with nickel
alloy paint all to no improvement. The set has been checked by
authorised repairers with an oscillograph to no fault found and decreed
that all parameters are within permissible settings.
We are trialling a Microair XCOM 760 this season.
If you find a solution to the Icom problem I'm dying to hear it.
BTW have you used the ICOM in Flight yet ? (sorry I meant ANGER!)
Regards
Bob Harrison G-PTAG
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of
MJKTuck@cs.com
Subject: Europa-List: Radio Question
Hi Folks,
I have successfully wired up my Icom A-200 comm and Flightcom 403MC
intercom.
It all seems to work except I can't hear myself through the earphones
when I
transmit. I spoke to Icom tech support and they said to turn up the
sidetone
adjustment on the A-200 which I found already turned as far clockwise as
it
would go.
But still no joy. Anybody have any similar experiences? Suggestions?
Regards,
Martin Tuck
Europa N152MT
Wichita, Kansas
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