Amp Meter ??

F

fixitphil

Member
I'm installing a 12v system (60 amp alt) in my '31 Sport Coupe and have been advised by a competent club member that the stock amp meter will have a tendency not to hold up, that I should replace it with a voltmeter. any thoughts and have any of you experienced that problem?
Thanks, Phil
 
Hey Phil, I use both a volt and 30 amp meter. But I only have a 35amp alternator, but the ammeter is not voltage sensitive, so use what ya got. I would however install a 30amp meter as opposed to the stock 20 amp meter, less strain on the needle.
 
On my '32 I placed a jumper wire across the the posts on the ammeter so only 1/2 (approx) of the current goes through the meter. Now all I have to do is double the amps in my head when reading the meter. You may be able to do this at the junction box depending on your wiring diagram. Read up on the quality of the reproduction ammeters before you make your decision.

Charlie Stephens
 
Charlie Stephens said:
On my '32 I placed a jumper wire across the the posts on the ammeter so only 1/2 (approx) of the current goes through the meter. Now all I have to do is double the amps in my head when reading the meter. You may be able to do this at the junction box depending on your wiring diagram. Read up on the quality of the reproduction ammeters before you make your decision.

Charlie Stephens
Click to expand...

The gauge of the wire that you use for the added wire determines how the amp meter scale is changed. High number does less, low number does more. The electrical term for the added wire is a "shunt".

Marc
 
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