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richardhughes260(at)yahoo
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 Posted: Mon Jan 02, 2006 12:09 pm Post subject: Transponder Static on intercom |
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I just installed a new intercom in my Cozy III.
I am getting some crackly static from the transponder
intermittently. (It goes away when I turn off the
transponder)
Do I need to run the groundplane for the antenna
directly to ground?
Should I have a shielded power wire to the
transponder? (Not sure if it is or not)
Any suggestions?
Patient: Doc it hurts when I do this
Doctor: Don't do that!
-Rich
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james(at)berkut13.com
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| Posted: Mon Jan 02, 2006 1:05 pm Post subject: Transponder Static on intercom |
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Same thing initially happened in my Berkut. The source was the Microair
transponder (no longer installed), but not the RF...it was a bad ground on
the "music" input for the intercom. Be sure your phone, mic and input jacks
are insolated and are not "grounded" together on a metal plate.
My fix was to change from a metal mounting plate to one made of fiberglass.
Either case, disconnect everything so you get no noise, then add only one
thing back at a time to isolate where the noise is entering your audio
circuits.
If no inputs are the problem, run the intercom from a separate power source
(i.e. external battery) to make sure the noise is not slipping in from the
power system. If that's your problem, you can put a filter on the
intercom's power lead.
I'm sure you will get plenty of feedback on this method of trouble shooting.
James Redmon
Berkut #013 N97TX
http://www.berkut13.com
<richardhughes260(at)yahoo.com>
I just installed a new intercom in my Cozy III.
I am getting some crackly static from the transponder
intermittently. (It goes away when I turn off the
transponder)
Do I need to run the groundplane for the antenna
directly to ground?
Should I have a shielded power wire to the
transponder? (Not sure if it is or not)
Any suggestions?
|
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
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