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> From: HKravec@aol.com
> Yes it does have the Bose system. I'll try pulling the radio out this
> weekend when I travel from Alabama to South CArolina and see what happens.
> The sound is very throttle sensitive, could this still be electronic???
Your sound is *almost certainly* occurring in the radio speaker
1) While driving, have a passenger FIND the noise. They will need
to put their ear next to each part of the dash, and pay specific
attention to the area in front of each speaker. My bet is that it's
coming out of the speakers.
2) If it relates to engine speed, it's normally RF noise generated
by the alternator. A large filter on the power line to the radio is
likely to be the solution. Alternator noise is a whine which generally rises
and falls in pitch "zzzzEEEEEEEeeeezzzZZZEEEEEeeee" as you rev the
engine and then let the revs drop. Noise from spark plug wires is more
like bacon frying.
You won't find anything out from pulling the radio - all you'll see
is the connectors which seat to it. HOWEVER - nothing would be lost
if you popped off each connector and made sure none of the press-on
wire connections had backed OUT of the connector. I have sometimes
seen this occur, and I could see how a loose connector could cause an
BUT - in the Bose system, there is no amp in the radio; the amps are
located at the speakers. Noise is generally only perceived after the
signal has passed thru amplification.
If you find the noise is coming from only ONE speaker, it's probably that
speaker with the problem (probably not a problem confined to one
channel of radio output - this is less likely). If it's coming from all speakers,
it's most likely in the radio. One additional possibility is the
antenna. This can be tested by connecting a standard 'Murrican fender
mount antenna (I keep a $12 Radio Shack spare...) to a <German
antenna connector to US-standard antenna adapter>. If there's no
noise with the substitute antenna, you know the problem is in that
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