[Fot] electric tach to fit TR4 tach body?

[Randall]

> which means that they'd like 
> to have something like reasonably consistent voltage. If your 
> TR4 is still running a generator, you may not like the results.

Chris, I'm not sure I understand this statement.  IMO alternators give even
higher voltage swings than generators, mostly at high charging currents with
the unit cold.  And they don't always keep up with the electrical load with
the engine idling; so any 'modern' instrument needs to take all that into
account.

> I believe that something like
> 
> 	http://www.dimensionengineering.com/AnyVoltMicro.htm
> 
> would be a good way to fix that problem,

Interesting device, but it's maximum input is only 14v, while most
alternators will put out 15v on cold start.  Not to mention the spikes when
a load is suddenly removed (like turning off the headlights).  TR2-4
generators can also get into the 15v range, with light loads (no-load
voltage is supposed to be set to between 15.6 and 16.1 volts).

-- Randall