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Date: Wed, 09 Dec 2009 19:48:18 -0500
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From: "Colyn Case at earthlink" <colyncase@earthlink.net>
References: <list-4004921@logan.com>
Subject: Re: [LML] IV-P alternator woes
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Andres,

Are you talking about the field CB?
Can you say which regulator?
If it's the standard b&c I believe it has a crowbar circuit for over =
voltage.   It intentionally shorts the field supply to ground so that =
the field CB pops, thereby averting a major problem.

When you say you "checked" the regulator, what do you mean exactly?  Did =
you check at what voltage turns off the alternator?

Based on what you describe it sounds like the regulator is either not =
adjusted correctly or defective.

Colyn

  ----- Original Message -----=20
  From: Dr Andre Katz=20
  To: LML=20
  Sent: Sunday, December 06, 2009 12:32 PM
  Subject: [LML] IV-P alternator woes






  during an approach to taos in the middle of a snow shower my =
alternator switch popped out
  tried to reset a couple of times but kept turning itself down
  used the back up alternator but had to keep the radios on during the =
instrument approach which had to be terminated since the runway got full =
of slush and 4 inches of snow so to santa fe
  the electricians detected a hot alternator and for 48 hrs tried to =
diagnose the problem=20
  apparently the alternator is not shutting itself of=20
  checked the voltage regulator the switch, the alternator and could not =
come up with an answer
  went back to dallas VFR with all radios off and handheld GPS with the =
backup alternator providing enough juice
  any ideas will be appreciated
  dont know much about damn electrons....
  andres IV-P alternator is almost new 40 hrs since new
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<META content=3D"MSHTML 6.00.6000.16915" name=3DGENERATOR></HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Andres,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Are you talking about the field =
CB?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Can you say which =
regulator?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>If it's the standard b&amp;c I believe =
it has a=20
crowbar circuit for over voltage.&nbsp;&nbsp; It intentionally shorts =
the field=20
supply to ground so that the field CB pops, thereby averting a major=20
problem.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>When you say you "checked" the =
regulator, what do=20
you mean exactly?&nbsp; Did you check at what voltage turns off the=20
alternator?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Based on what you describe it sounds =
like the=20
regulator is either not adjusted correctly or defective.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Colyn</FONT></DIV>
<DIV>&nbsp;</DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A title=3Dbu131@swbell.net href=3D"mailto:bu131@swbell.net">Dr Andre =
Katz</A>=20
  </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A title=3DLML=20
  href=3D"mailto:LML">LML</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, December 06, 2009 =
12:32=20
  PM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [LML] IV-P alternator =
woes</DIV>
  <DIV><BR></DIV>
  <DIV style=3D"FONT-SIZE: 12pt; FONT-FAMILY: arial, helvetica, =
sans-serif">
  <DIV><BR></DIV>
  <DIV style=3D"FONT-SIZE: 12pt; FONT-FAMILY: arial, helvetica, =
sans-serif"><BR>
  <DIV style=3D"FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, =
sans-serif">during=20
  an approach to taos in the middle of a snow shower my alternator =
switch popped=20
  out</DIV>
  <DIV style=3D"FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, =
sans-serif">tried=20
  to reset a couple of times but kept turning itself down</DIV>
  <DIV style=3D"FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, =
sans-serif">used=20
  the back up alternator but had to keep the radios on during the =
instrument=20
  approach which had to be terminated since the runway got full of slush =
and 4=20
  inches of snow so to santa fe</DIV>
  <DIV style=3D"FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, =
sans-serif">the=20
  electricians detected a hot alternator and for 48 hrs tried to =
diagnose the=20
  problem </DIV>
  <DIV=20
  style=3D"FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, =
sans-serif">apparently=20
  the alternator is not shutting itself of </DIV>
  <DIV=20
  style=3D"FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, =
sans-serif">checked the=20
  voltage regulator the switch, the alternator and could not come up =
with an=20
  answer</DIV>
  <DIV style=3D"FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, =
sans-serif">went=20
  back to dallas VFR with all radios off and handheld GPS with the =
backup=20
  alternator providing enough juice</DIV>
  <DIV style=3D"FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, =
sans-serif">any=20
  ideas will be appreciated</DIV>
  <DIV style=3D"FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, =
sans-serif">dont=20
  know much about damn electrons....</DIV>
  <DIV style=3D"FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, =
sans-serif">andres=20
  IV-P alternator is almost new 40 hrs since=20
new</DIV></DIV></DIV></BLOCKQUOTE></BODY></HTML>

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