[R-390] OT: Meter Internal Resistance

[Barry]

I have a Triplett panel meter that was originally shunted to 1A DC full 
scale.  I want to use this as a voltmeter so am in the process of analyzing 
the meter movement.

I have measured the full scale deflection to be 8 mA.  I thought this was a 
rather odd reading, but it agrees with both my analog meter and DMM.  With 
them both in series, they both show 8 mA so I'm pretty sure this is correct.

What I'm wondering about is the internal resistance.  I connected a pot 
across the meter and adjusted it so the meter under test read 1/2 scale. 
The pot measures 8 ohms.  Again, this seems a rather odd value.

I then connected the DMM in DCV mode across the meter and set the meter 
under test to full scale deflection and measured the voltage drop across it. 
It measures 55 mV.  55 mV divided by 8 mA yields 7 ohms making it pretty 
close to agreeing with the 8 ohms I was reading on the parallel pot.

Do these values seem "normal"?  I was thinking these little meters would 
typically have a 1 mA FS and something on the order of 100 ohms or more.

Just wondering if I might be way off and not realizing some doofus mistake 
(which I am somewhat prone to making).

Thanks!

Barry - N4BUQ