[DeTomaso] Fluttering Amp Gage

[Mike Thomas]

The change made today was to replace an aging battery isolator switch as I
was having a hot start issue and wanted to rule out a bad connection
somewhere in the  charging/starting system.  Replaced the switch.  All else
seemed to go fine.  The curious part is that the needle was not jumping
before I changed out the isolator switch, now it does.

 

Hmm ...

 

Mike Thomas

Pres., Panteras Northwest

Yellow '74 #6328

 

 

 

From: SOBill at aol.com [mailto:SOBill at aol.com] 
Sent: Sunday, March 29, 2015 2:42 PM
To: mbefthomas at comcast.net; detomaso at poca.com
Subject: Re: [DeTomaso] Fluttering Amp Gage

 

A fluttering Pantera ammeter is quite common.

 

The Veglia ammeter has no damping for the needle movement. The Ford voltage
regulator charges the battery with pulses of current. The pulses of charging
current cause the undamped ammeter needle to get quite vigorous.

 

See http://www.panteraplace.com/page178.htm for a description of the guts of
the ammeter.

 

I know of no real solution to this problem with a stock ammeter and
regulator. As the ammeter ages the pivot for the needle becomes worn and the
needle will sure jump about.

 

The main thing is to keep the main thing the main thing.
Do the best you can with what your have where you are.
Have fun today!
SOBill 

 

In a message dated 3/29/2015 1:56:31 P.M. Pacific Daylight Time,
mbefthomas at comcast.net <mailto:mbefthomas at comcast.net>  writes:

Trying to debug a hot start issue, and on the last start, my amp gage
started fluttering.  Never seen that one before and am wondering if I have
an alternator that's going bad.  Other possibilities?

Thanks
Mike Thomas
Pres., Panteras Northwest
Yellow '74 #6328




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-------------- next part --------------
   The change made today was to replace an aging battery isolator switch
   as I was having a hot start issue and wanted to rule out a bad
   connection somewhere in the  charging/starting system.  Replaced the
   switch.  All else seemed to go fine.  The curious part is that the
   needle was not jumping before I changed out the isolator switch, now it
   does.


   Hmm .....


   Mike Thomas

   Pres., Panteras Northwest

   Yellow '74 #6328




   From: SOBill at aol.com [mailto:SOBill at aol.com]
   Sent: Sunday, March 29, 2015 2:42 PM
   To: mbefthomas at comcast.net; detomaso at poca.com
   Subject: Re: [DeTomaso] Fluttering Amp Gage


   A fluttering Pantera ammeter is quite common.


   The Veglia ammeter has no damping for the needle movement. The Ford
   voltage regulator charges the battery with pulses of current. The
   pulses of charging current cause the undamped ammeter needle to get
   quite vigorous.


   See [1]http://www.panteraplace.com/page178.htm for a description of the
   guts of the ammeter.


   I know of no real solution to this problem with a stock ammeter and
   regulator. As the ammeter ages the pivot for the needle becomes worn
   and the needle will sure jump about.


   The main thing is to keep the main thing the main thing.
   Do the best you can with what your have where you are.
   Have fun today!
   SOBill


   In a message dated 3/29/2015 1:56:31 P.M. Pacific Daylight Time,
   [2]mbefthomas at comcast.net writes:

     Trying to debug a hot start issue, and on the last start, my amp
     gage
     started fluttering.  Never seen that one before and am wondering if
     I have
     an alternator that's going bad.  Other possibilities?
     Thanks
     Mike Thomas
     Pres., Panteras Northwest
     Yellow '74 #6328
     _______________________________________________
     Detomaso Forum Managed by POCA
     Posted emails must not exceed 1.5 Megabytes
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     To manage your subscription (change email address, unsubscribe,
     etc.) use the links above.

References

   1. http://www.panteraplace.com/page178.htm
   2. mailto:mbefthomas at comcast.net
   3. mailto:DeTomaso at poca.com
   4. http://poca.com/mailman/listinfo/detomaso_poca.com