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.
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