UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Suitable panel meters for use as a "VU" style meter on amplifier

Stockden · 16th May 2021, 2:24 pm

Well if you've been inside a panel meter before then you shouldn't have a problem.

One thing though. As these are voltmeters, there are no shunts. Instead they have multipliers.

A shunt is a low-value resistance connected in parallel with a current meter, to enable it to read a higher FSD range of current than the basic meter does alone.

A multiplier is a high-value resistance connected in series with a current meter, to enable it to read and be calibrated in terms of voltage.

So you can indeed snip one end of the shunt in an ammeter and end up with a more sensitive ammeter but if you snip one end of the resistor in a voltmeter you will simply end up with a non-working voltmeter.

16th May 2021, 2:24 pm	#32
Stockden Heptode Join Date: Mar 2008 Location: Forest of Dean, Gloucestershire, UK. Posts: 648	Re: Suitable panel meters for use as a "VU" style meter on amplifier Well if you've been inside a panel meter before then you shouldn't have a problem. One thing though. As these are voltmeters, there are no shunts. Instead they have multipliers. A shunt is a low-value resistance connected in parallel with a current meter, to enable it to read a higher FSD range of current than the basic meter does alone. A multiplier is a high-value resistance connected in series with a current meter, to enable it to read and be calibrated in terms of voltage. So you can indeed snip one end of the shunt in an ammeter and end up with a more sensitive ammeter but if you snip one end of the resistor in a voltmeter you will simply end up with a non-working voltmeter.