> I was told to use a circuit similar to the one in the
> Ameritron AL-800 or 1200 which uses an op amp. The
> manuals are available on the Ameritron site but do not
> contain schematics. Any suggestions or assistance
> will be much appreciated.
Get a regular manual and you also should get the schematic.
I'd just order the PC board from them. It uses an op amp
driving a fast relay, and by changing only one resistor
value you can set the toggle voltage to almost anything you
like, so it will work with almost any meter shunt.
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