Barry :
The curved glass indicates it is from a TR3 or early TR4 (later TR4
gauges were flat), the spade lugs indicate a post-TS60000 car.
However, ISTR that the original ammeters only had the extra lug on one
side (power feed to the OD relay/solenoid), so it's possible you have a
Lucas replacement, like Moss used to sell.
Anyway, they all were "direct series" gauges, I've never seen a LBC with
a remote shunt. (Although on a TR3, the horns and OD solenoid also
don't connect through the ammeter.)
Any decent electronics store should have the mating connectors, ask for
a '3/8" female disconnect'. (The usual size is 1/4", they also come in
3/16" and 3/32".) Radio Shack is _not_ my idea of a decent electronics
store, but they might have them anyway <g> Their catalog lists them as
P/N 910-1358. I do have a few in the parts bin, so let me know if you
still can't find them.
Randall
59 TR3A daily driver
Barry Schwartz wrote:
>
> I just purchased an early TR amp gauge, downward pointing needle, 30-0-30.
> I was told it was from a TR3/4. It has the curved glass in perfect
> condition, and a very good condition chrome bezel. I bought it because I
> wanted to replace the one I have in my car now. The differences are that
> this gauge is made by Lucas, and the one I am replacing is a smiths. They
> appear outwardly identical aside from the lettering of the manufacturer. I
> want to replace the bezel and glass to match what I have (with the smiths
> stuff, flat glass, chrome ring/black bezel) but my main question is
> operation. The one I have now is a direct series type, that is to say that
> all electrical loads that go to the car (with the exception of the starter)
> run THROUGH this gauge. I remember some talk of amp gauges that use a
> shunt and this is not what I have in the car now. Does the early type amp
> gauge use this shunt or is it like the one I have in the car presently? I
> am leaning towards the latter because the gauge has some fairly large male
> slip on terminals (that I can't seem to locate the female counterparts for)
> indicating a large current capacity, but at the same time it also has
> terminals for the smaller easily available push on variety. They appear to
> be all one terminal that is to say one piece of metal. The larger terminal
> is on "the top" and the bottom has the smaller terminal, looking at the
> back of the gauge. Anybody have the scoop? I don't want to fry this gauge
> - it's apparently hard to come by
>
> Barry Schwartz (San Diego) bschwart@pacbell.net
>
> 72 PI, V6 Spitfire (daily driver)
> 70 GT6+ (when I don't drive the Spit)
> 70 Spitfire (long term project)
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