gmcjetpilot
Joined: 04 Nov 2006
Posts: 170
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 Posted: Sat Dec 29, 2007 6:40 am Post subject: Icom A200-Help! (two radios, internal |
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Ed as I emailed you off the Experimental Avionics list hear is more
info with some links to the drawings I mentioned. I did not realize
you had TWO radios?
You can down load the manuals (pdf) not photo copied here
directly from ICOM:
http://www.icomamerica.com/en/products/avionics/panelmount/a200/default.aspx
Ed you have two radios? and you want to use the internal
intercom? I am thinking you would be better served with with an
intercom and/or auto panel. You can make a mess or wires and
switches (and a few resistors and capacitors) to make two radios
work and still use the ICOM A200's internal intercom but WHY?
Really seriously the ICOM A200 intercom is just a HOT mic and not
very good. Remember when you switch radios you will switch
intercoms. You also reslize that the intercom is not voice activated
or VOX. You have to select it. You can't transmit on the radio and
have the intercom at the same time, one or the other.
However if you want to use it, here are some drawings as an
adjunct to the manual which might be clearer.
This is more illustrated wiring picture with the external intercom
switch (DPDT) shown:
http://img486.imageshack.us/img486/8466/icoma2004lh.jpg
May a better way to wire the intercom is to use two buttons, one for
PTT and one for INTERCOM. Of course you can have two PTTs
and two INTERCOM buttons for a total of four.
http://img80.imageshack.us/img80/7822/dualbuttonwiringgz2.jpg
You can avoid a audio panel but you will need a switch to select
the radio you want to transmit on. You will slave the audio from one
ICOM to the second. This is kind of a work around.:
http://img486.imageshack.us/img486/3088/icomblock5xg.jpg
Again if you have two radios you really should get an audio panel/
VOX intercom in my opinion. You can get a used audio panel for a
few $100. A new one perfect for you from PS Engineering:
http://www.ps-engineering.com/pma4000.shtml
You realize the internal intercom is a HOT MIC intercom and the
volume has no adjustment. There is no squelch and you basically
have to select transmit or intercom but not both. I really would
encourage you to get a VOX intercom. If you have two radios an
audio panel could be real nice. eBay as them used or you could
build a RST
http://www.rst-engr.com/rst/catalog/audio_panel.html
Good Luck Happy New Year. George
Be a better friend, newshound, and [quote][b]
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