[rebel-builders] radio noise
Posted: Sun Feb 19, 2012 10:47 am
Hi Cec !
I've run into the ICOM thing with their PTT's - you DO need THEIR
switches (and they're a bit pricey !) - they have been like this for
many years ! Thought the new ones were supposed to use standard
stuff - guess not ...
Is it a crackle, or a whine ?? Does it get worse with RPM,
or with airspeed ??? This will give clues - if it's a whine, and
gets worse when you turn on landing and/or nav lights, or strobes,
it's most likely alternator noise, and can be eliminated with
a filter. If it's a crackle, it could be a loose electrical connection,
bad PTT, or your mike is too sensitive, and is picking up wind noise,
etc. - sometimes (often !) intercoms just do not match radios, and there
is a clash of squelch functions --- try the radio without the intercom,
and on it's internal battery, instead of hooked to the cigarette lighter.
That will eliminate a couple of possibilities.
If it's a pop that changes with RPM, you could have a bad plug
lead (or 2 ...) - be good to check them over.
Sounds like the first thing would be to get the proper ICOM
wiring harness & PTT switch - you might be amazed !
......bobp
-------------------------------orig.-------------------------
On Thursday 11 May 2006 01:31 am, british thunder wrote:
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I've run into the ICOM thing with their PTT's - you DO need THEIR
switches (and they're a bit pricey !) - they have been like this for
many years ! Thought the new ones were supposed to use standard
stuff - guess not ...
Is it a crackle, or a whine ?? Does it get worse with RPM,
or with airspeed ??? This will give clues - if it's a whine, and
gets worse when you turn on landing and/or nav lights, or strobes,
it's most likely alternator noise, and can be eliminated with
a filter. If it's a crackle, it could be a loose electrical connection,
bad PTT, or your mike is too sensitive, and is picking up wind noise,
etc. - sometimes (often !) intercoms just do not match radios, and there
is a clash of squelch functions --- try the radio without the intercom,
and on it's internal battery, instead of hooked to the cigarette lighter.
That will eliminate a couple of possibilities.
If it's a pop that changes with RPM, you could have a bad plug
lead (or 2 ...) - be good to check them over.
Sounds like the first thing would be to get the proper ICOM
wiring harness & PTT switch - you might be amazed !
......bobp
-------------------------------orig.-------------------------
On Thursday 11 May 2006 01:31 am, british thunder wrote:
I started to get allot of static through the com and the radio.
so I bought a new com and now Icom A6.
the static is still there ( BAD )
If I touch the rubber antenna it lets up a lot, If I have it on the
external antenna it is unbearable. and the com is almost unusable, too much
static and noise when you talk. It wasn't this bad last year only when the
battery was really low. On top of all this I cannot transmit only receive.
I talked to ICOM they said it was noise from the mags or the alt. and I
have to buy there ptt switch to be able to transmit. Any ideas or
solutions??
Has anyone delta with this??
Thanks
Cec
014R
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