|
Jim,
Could be lots of things, but I would be willing to bet a cold beer that
its in the audio input path to your radio, and not between the radio
and the antenna given that you receive fine.
Here's a few thoughts that _might_ help:
Loose/broken wire in mic - Try a different microphone
Oxidation in mic jack - Clean both the male and female jacks
Loose/broken wire between mic jack and radio
Cold solder joint in either mic, jack, etc
PTT switch starting to oxidize internally
Good luck finding the problem.
Don W.
jfleisc@aol.com wrote:
> I'm looking for ideas here; ATC says my radio transmissions sound
> 'scratchy' or 'staticy' as little as 15 miles out on callup. I've
> been going nuts trying to find the cause. The aircraft has 2
> independant radios, 2 antenna systems (one on top of the fuselage, one
> underneath). One radio replaced as an update recently. Both radios have
> been checked out by the factories recently and pronounced fine (one
> Narco Mk12D and one Icom). Been through the wiring and grounds several
> times and found nothing. Tried different headsets (note: the voice
> sideband through the headset sounds perfect). ATC said no difference
> with alternator shut off. Reception is always perfect. Complaints seem
> to pick up more in the cold weather. Don't know if its important but
> maybe once or twice each summer I get alot of static in the headset
> that seems to disapate in a minute or two, but never in the winter.
> If I were generating a large static charge in the dry winter air
> wouldn't it effect my reception? Some days I get complaints even when
> taxiing for takeoff. Any ideas what to try next without going on an
> expensive fishing expedition?
>
> Jim
>
|
|
Re: "scratchy" radio transmission
