Re: [Chrysler300] 300H amp gauge

[2HsandaHeritage@xxxxxxxxxxx]

Hi Bob, Bob and Group, 



Thatks to all who responded. 

I replaced the solid state regulator that I got from John H with an old mechanical one that I had laying around and guess what - it behaved like it should! 

No rapid fluctulations! I plan to install the "suspect" solid state one on my other H and see what happens. 

It's 90 degrees today, so maybe the higher temp. made a faulty connection more secure? 



Doug Warrener  

Fair Oaks, CA 

300H 
----- Original Message ----- 
From: "Bob Jasinski" <rpjasin@xxxxxxxxxxx> 
To: "Robert' 'Blohm" <robert.blohm@xxxxxxxxxxx>, 2HsandaHeritage@xxxxxxxxxxx, Chrysler300@xxxxxxxxxxxxxxx 
Sent: Saturday, April 18, 2009 1:21:49 PM GMT -08:00 US/Canada Pacific 
Subject: RE: [Chrysler300] 300H amp gauge 


Dear List, 

We are fortunate to have Bob Blohm as a contributor to this list and a Club member.  I have had the pleasure of also working with Bob at Exide and owe a great deal of my battery knowledge to him, as I attended training classes taught by him while employed at Exide.  Bob's battery and charger knowledge is extensive and he has assisted me with technical advice in applications ranging from motive power forklift batteries, to telephone backup systems, to substation batteries in nuclear power plants. 

Great post Bob, and as you mentioned, the problem can be fixed by going to a solid state regulator.  This is what I did a number of years ago and never looked back.  It is possible to install the solid state regulator in the old mechanical regulator box so as to maintain the original look most of us prefer, that's what I did on my 300G.  No more headlight flicker and bouncing ammeter! 

Bob J 




From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Blohm, Robert 
Sent: Friday, April 17, 2009 7:15 PM 
To: 2HsandaHeritage@xxxxxxxxxxx; Chrysler300@xxxxxxxxxxxxxxx 
Subject: RE: [Chrysler300] 300H amp gauge 









Doug, I have a 61 Imperial that does exactly the same thing. The alternator was invented and first used by Chrysler in either 60 or 61. GM caught up in 63 and Ford in 64 for some models. When you start the car you take some power out of the battery. This suppresses the battery voltage slightly. With the engine running the regulator now puts on full field excitation to the alternator and the alternator puts out full power thus you see the ammeter swing up to high rate of charge. Since the battery is only slightly discharged it immediately responds by increasing its voltage. The regulator immediately cuts back to low charge thus the ammeter drops back to center, however, the battery voltage now drops back slightly lower than the regulator would like and it responds by going back to the high rate of charge. As soon as the battery has recieved enough power to replace that which was removed during starting (a couple of minutes) the voltage will hold up high enough that the regulator will not call for the high rate charge and now the ammeter settles down in the center. Later cars had some damping in the ammeter to suppress these swings and make them less noticable. Late 60's went to solid state regulators which eliminated this characteristic. The solid state regulator is continuously variable while the early mechanical (relay) regulators where more of an all or nothing situation. I worked for Exide Battery for 44 years, all though I was in the industrial division, but spent a lot of time working with charging methods and response of a battery. Hope this helps explain it. Bob Blohm 
-----Original Message----- 
From: Chrysler300@xxxxxxxxxxxxxxx [mailto: Chrysler300@xxxxxxxxxxxxxxx ]On Behalf Of 2HsandaHeritage@xxxxxxxxxxx 
Sent: Wednesday, April 15, 2009 1:32 PM 
To: Chrysler300@xxxxxxxxxxxxxxx 
Subject: [Chrysler300] 300H amp gauge 

Hi Group, 

My amp gauge needle rapidly moves back and forth when the engine is started. 

After driving a mile or so, the needle settles down and remains near the center of the gauge. 

Can anyone explain what the cause might be? 

Doug Warrener 

Fair Oaks, CA 

300H 

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