Monday, November 14, 2011

New to Old - Voltage Regulator

Hi All,

As well as the fuse box and relay kit there was another goodie from Bits4Brits, a voltage regulator.

This is used to convert the twelve (and a bit) volts into a "stable" 10 volts for the Temperature and Fuel gauges. The original unit works of a coil of wire heating up and working a bi-metal strip creating a sort of on-off around 10V, not very good originally and after 40 years even worse.

Only problem is that the new unit is a modern IC and whilst it is still buried under the dash I wanted to still try and replicate the original so time for a bit of "adjusting".

This is the original unit.

The internals out and you can see the wire windings.

This is the new unit, not so period looking.

So time for a bit of surgery.

Good earth is important so the IC was pop riveted into the case.

Routed the cables out and crimped on new spades.

Job done !

I think it looks a lot better.

As always, any comments, questions or abuse welcome.

Richard B.

Next . . . . . . Giving the engine bay a clean.


  1. Hi: Do you have a MGB in Qatar? I am looking for one. My email address is

  2. Hi Mike,

    Sorry I'm in Dubai very few MG's out here at all and not heard of any in Qatar. A lot more old yank muscle if that takes your fancy.

    Come over to and say high, lots of mad car people and some in qatar.

    Richard B.