[Amps] Magic Meter Shunts...

[COLIN LAMB]

> Hi,
> 
> I have a bunch of NOS meters I've collected over time.
> I'd like to use them in a new 6m amp I'm putting together, so
> I need to make some shunts...
> 
> Anyone know of a procedure where I can determine the internal
> resistance without damaging the meter movement?  or, am i SOL?
> Some are uA meters, some volts and some watts -- so who knows what
> the intended range was.
> 
> Thanks,
> 
> Gerry, W1VE

Digital voltmeters have current limiting in the ohms setting and are
excellent for determining the resistance of the unknown meters.  Analog
ohmmeters may have excessive current.

Start out on the high resistance range and work your way down.  As you go
down, the current increases.  Low current meters have high resistance (2 k
ohms or so).  

Some meters have built in shunts or multipliers that can be removed.  There
are some excellent software programs available for making a new scale on
that old meter.  Some are freeware or shareware.  

The day of the hand made meter scales and dymo tape labels is over (Thank
goodness).  

Colin  K7FM