REFLECTOR:Headset Heartache

[Brian Michalk]

Cool.
I think some of the other posts regarding good radio connections are
excellent ideas.

Try the cheap/easy things first.

The alternator circuit breaker being pulled may or may not isolate the
alternator.

There may be wires going to the field that are still connected.  The
alternator battery leads  may also still be connected.  Unless I see your
schematic, I can't say what pulling the breaker isolates.  I was hoping that
you had a switch to remove the alternator field.  Killing the field might
kill the noise, if the alternator is the culprit.  However, the alternator
still makes a little bit of power even with the field off because the rotor
is slightly magnetized.

> -----Original Message-----
> From: reflector-admin@tvbf.org [mailto:reflector-admin@tvbf.org]On
> Behalf Of Chuck Jensen
> Sent: Tuesday, September 23, 2003 1:40 PM
> To: 'reflector@tvbf.org'
> Subject: RE: REFLECTOR:Headset Heartache
>
>
> 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?
>
> _______________________________________________
> To change your email address, visit
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery!  www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
> _______________________________________________
> To change your email address, visit
http://www.tvbf.org/mailman/listinfo/reflector

Visit the gallery!  www.tvbf.org/gallery
user:pw = tvbf:jamaicangoose
Check new archives: www.tvbf.org/pipermail
Check old archives: http://www.tvbf.org/archives/velocity/maillist.html