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MG MGA - Smith's voltmeter

Just fitted a Smiths "classic" voltmeter. Works fine and looks right. However.

These gauges are bi-metallic. I have wired it in to the switched side of the ignition so it comes on when the key is turned. Being bi-metallic there is an appreciable delay before it reads full voltage, perhaps about 15-20 seconds.

Are the older Smiths gauges moving coil so giving an instant readout.

If I have got any of the above theory wrong forgive me, electrics is not my strongest point.

Thanks

Chris.
Chris C

Chris,
My experience is the same as yours with the same new Smiths "classic" voltmeter. -M.S.
Martin Straka

Classic smiths reproductions are generically similar to 1968 and newer Smiths gauges for function so yes, you are basically correct.
-BMC.
BMC Brian McCullough

Chris - Many of the gauges use a bi-metalic or a taught wire movement so there is sufficient damping to keep the gauge from responding to transient voltage spikes. I believe that most, if not all auto voltmeters are like that. Cheers - Dave
David DuBois

This thread was discussed between 28/04/2005 and 29/04/2005

MG MGA index

This thread is from the archive. The Live MG MGA BBS is active now.