REFLECTOR:Headset Heartache

[Jeff Barnes]

Hi Chuck,

	Try a different headset.  I had some wierd things happen just before a
couple pairs I had went south.  You may have a short in one of the plugs
and your bumping the plug when you touch the recepticle.

Regards,
Jeff Barnes

Chuck Jensen wrote:
> 
> When I go to the field later this afternoon, and assuming I can make the
> noise appear again on cue, we'll certainly explore those ideas.  During the
> test flight, I was real hopefully when I pulled the alternator circuit
> breaker.  The noise died-off almost in snyc with pulling the breaker, was
> quiet for a 5 seconds, then SCP again.  Subsequent cycling showed there was
> no (dis)connection with the alternator.
> 
> However, is it correct to assume that if the alternator breaker is been
> pulled, that that effectively isolates the alternator from the electrical
> system and it would be unable to induce noise to the electrical/audio
> system?
> 
> Finally, I've tried to relate hot/cold/humidity/stock market to changes in
> the noise but I find no correlation or commonality.
> 
> With that said, I now go forth to slay the electronic dragons.
> 
> Chuck Jensen
> 
> -----Original Message-----
> From: reflector-admin@tvbf.org [mailto:reflector-admin@tvbf.org]On
> Behalf Of Brian Michalk
> Sent: Tuesday, September 23, 2003 11:38 AM
> To: reflector@tvbf.org
> Subject: RE: REFLECTOR:Headset Heartache
> 
> > So, this morning, I got the av shop to commit a tech and I agreed
> > to go down
> > to the aerodome so I could run the engine for him to aid in the
> > troubleshooting, since it is quiet running on batteries.  I fired it
> 
> Ahh.  There is a clue.
> It is quiet running on batteries, engine not running.
> It is noisy running on batteries, engine running.  -- alternator field off
> It is noisy running on alternator, engine running. -- alternator field on
> 
> Perhaps it is the alternator, or something associated with a running engine.
> 
> Check/clean the ground strap to the alternator.
> Check/clean the ground strap to the engine.
> Check/clean the battery ground path (bus).
> --those are easy.
> Remove all electrical cables from the alternator, then run the engine.  See
> if the problem still creeps up.
> 
> Unfortunately this seems intermittent, which makes things difficult to
> diagnose.
> Does it get better/worse with humidity, engine temperature or altitude?
> 
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