[AMRadio] Component ID please


Rick Brashear rickbras at airmail.net
Mon Dec 11 11:54:28 EST 2006


Dang!  You're right again, John!  I now see the series wiring.  Good call.
Rick/K5IZ

John E. Coleman (ARS WA5BXO) wrote:

>No, look again, it is internal series multiplier, so that the meter will
>read volts with a direct hookup.  If this is a 0-500 Volt meter as the
>picture seems to indicate, and multiplier was 500,000 ohms then the meter
>movement would have been a 1ma movement.  I see no reason for a capacitor to
>bypass the resistor, maybe the meter but not the resistor. So perhaps the
>other device was another resistor to adjust the value so that the meter is
>more accurate than it was with just the one resistor.  It may also be for
>temperature compensation.  Both could be removed and the one milliamp
>movement used with an external resistor arrangement or divider.  With the
>proper circuitry and switch it could be a 0-500 milliamp or 0-5KV.
>
>John, WA5BXO 
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