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grumman(at)drahz.com
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 Posted: Sun Jul 22, 2012 11:22 am Post subject: Ammeter wavering theoretical solution |
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Just a reminder about some old-time knowledge
Those of you who have flown with me know that about the only needle I
can keep near-center on my panel is the ammeter. Imagine my surprise
when my ammeter joined the dance-ensemble in my panel.
In theory, the spade connectors on the back of the split master switch
could have some oxidation over time, and might not be making a great
connection. If your ammeter is looking like my glide slope needles on
an ILS, you may want to have your A&P check the master switch spade
connections behind the panel. I might conjecture it would take less time
to do that than it would to type this note.
mattd
/do not archive
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teamgrumman(at)yahoo.com
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| Posted: Mon Jul 23, 2012 12:19 am Post subject: Ammeter wavering theoretical solution |
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Many years ago (I was still in Lancaster) I chased a wiggling ammeter needle for weeks it seems. I tried a new master switch, checked the impedance, to the alternator-master-regulator, cleaned the terminals on the regulator, replaced the regulator, cleaned all the terminals on the alternator, replaced the alternator, and considered just rewiring the whole thing. It turned out to be the ammeter itself. Or, should I say, the connections on the ammeter.
I hate chasing down things like that.
Gary
Sent from my iPad
On Jul 22, 2012, at 12:04 PM, N18AP <grumman(at)drahz.com> wrote:
| Quote: |
Just a reminder about some old-time knowledge
Those of you who have flown with me know that about the only needle I can keep near-center on my panel is the ammeter. Imagine my surprise when my ammeter joined the dance-ensemble in my panel.
In theory, the spade connectors on the back of the split master switch could have some oxidation over time, and might not be making a great connection. If your ammeter is looking like my glide slope needles on an ILS, you may want to have your A&P check the master switch spade connections behind the panel. I might conjecture it would take less time to do that than it would to type this note.
mattd
/do not archive
|
| | - The Matronics TeamGrumman-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?TeamGrumman-List |
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