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OK, Thinking-Cap Time...



 
 
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  #21  
Old November 18th 05, 08:22 PM posted to rec.aviation.owning
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Default OK, Thinking-Cap Time...

("Jim Burns" wrote)
Hope the alternator itself isn't toast!


"Montblack" wrote:
That's a half-baked assumption.
Like those Capital One ads ...No, No, No.
Any way you slice it, it's always the ground.
...cheaper that way. g


Just be careful not to fry it.
  #22  
Old November 18th 05, 08:22 PM posted to rec.aviation.owning
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Default OK, Thinking-Cap Time...

Oh, now you're talking like a man with only 1/2 a loaf!
Jim

"Montblack" wrote in message
...
("Jim Burns" wrote)
Hope the alternator itself isn't toast!



That's a half-baked assumption.

Like those Capital One ads ...No, No, No.
Any way you slice it, it's always the ground.

...cheaper that way. g


Montblack



  #23  
Old November 18th 05, 09:18 PM posted to rec.aviation.owning
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Default OK, Thinking-Cap Time...



Clean all the grounds.

The alternator ones, the regulator ones, the frame to engine one...
--
A host is a host from coast to
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433
  #24  
Old November 18th 05, 09:18 PM posted to rec.aviation.owning
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Default OK, Thinking-Cap Time...

("Jim Burns" wrote)
Oh, now you're talking like a man with only 1/2 a loaf!



Are you implying I'm light in the loafers?


Montblack
Loafing around the house today
  #25  
Old November 18th 05, 09:33 PM posted to rec.aviation.owning
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Hmm.... if the shoe fits!! lol
Jim

"Montblack" wrote in message
...
("Jim Burns" wrote)
Oh, now you're talking like a man with only 1/2 a loaf!



Are you implying I'm light in the loafers?


Montblack
Loafing around the house today



  #26  
Old November 19th 05, 03:56 AM posted to rec.aviation.owning
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Default OK, Thinking-Cap Time...

"Jay Honeck" writes:


2) In steady-state flight, both of us hear a "woo--woo--woo..." softly in
the headphones. It sounds just like strobes that aren't grounded properly.

....

6) Turning the alternator side of the split master switch ALSO makes the
noise go away. It sometimes stays away when I turn the alternator back on.
Sometimes it doesn't.



After you clean all the grounds...

C) Others mention the split master. Does it feel warm at all? Since
its brothers have been found guilty before; it's a good suspect even
if stone cold.

Wonder if there is a safe way to bypass it long enough to make a
test flight. I'd say just replace it, but know that a $5 switch
like that becomes a $500 switch once annointed with FAA Holy Oil.

B) The skyranch URL sounds like the Right Stuph.

A) This does NOT sound like a blown alternator diode to me. The
'pulsing' from that is in the kiloHertz range; this sound like it's
more like 0.5 Hz.
--
A host is a host from coast to
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433
  #27  
Old November 19th 05, 06:24 AM posted to rec.aviation.owning
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Default OK, Thinking-Cap Time...

Jay Honeck wrote:
See: http://www.sacskyranch.com/altnoise.htm



Awesome source -- thanks!

And located just down the road from me!


--
Jack Allison
PP-ASEL-IA Student
Arrow N2104T

"When once you have tasted flight, you will forever walk the Earth
with your eyes turned skyward, for there you have been, and there
you will always long to return"
- Leonardo Da Vinci

(Remove the obvious from address to reply via e-mail)
  #28  
Old November 19th 05, 03:29 PM posted to rec.aviation.owning
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Default OK, Thinking-Cap Time...



C) Others mention the split master.

.stuff snipped


I'd say just replace it, but know that a $5 switch
like that becomes a $500 switch once annointed with FAA Holy Oil.



Actually, that split switch for Jay's plane is a fooler. I bought the
official Piper part from Des Moines Flying Service (DMFS.com) a couple
of years ago and I remember it being less than $50. Some day I actually
have to INSTALL IT!

I like the idea of the "Bypass wire" test. I could do it on the ground
because my Cherokee does this all the time.

Good Luck,
Mike
  #29  
Old November 19th 05, 05:00 PM posted to rec.aviation.owning
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Default OK, Thinking-Cap Time...


"George Patterson" wrote in message
news:Q%7ff.60$N44.3@trndny08...
snip
Alternator problem. Possibly a filter, but my guess is a diode is going
bad.

snip

Diodes are solid state devices which either work, are open (most common
failure), or are shorted out (less common failure). They don't suffer from
"going bad" or "getting weak". They either work or they don't. If they are
intermittant, it's a connection, not the diode itself.

DB
(Many years of Electronics experience)


  #30  
Old November 20th 05, 01:02 AM posted to rec.aviation.owning
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"Doodybutch" writes:



Diodes are solid state devices which either work, are open (most common
failure), or are shorted out (less common failure). They don't suffer from
"going bad" or "getting weak". They either work or they don't. If they are
intermittant, it's a connection, not the diode itself.



Well, maybe... I have had some larger power diodes whose *internal*
bonds would open when the diode got hot. When it cooled again, guess
what.

I also had a matrix of small-signal glass diodes that tested just
fine with an ohmmeter, but in operation.... turns out some would
"zener" when tested with the 12v that was used in the circuit.

But I really doubt that Jay's issue is alternator diodes....


--
A host is a host from coast to
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433
 




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