Look in the MFJ catalog. They sell all the meters used in their equipment.
You could probably also download the manuals with schematics to have the
start of the circuitry needed to make them read properly.
On Sun, Feb 3, 2013 at 12:06 PM, Jim Lux <jimlux@earthlink.net> wrote:
> On 2/3/13 7:18 AM, Patrick Greenlee wrote:
>
>> Often, meters is meters. D'Arsonval meters are typically used in
>> circuits for measuring volts or amps. the same meter can do either or
>> both depending on the circuit it is used with. While the meter movement
>> itself might require 50. 100 or whatever micro amps for FSD ( full scale
>> deflection) the other circuit elements determine its function.
>>
>
>
>
> <snip>
>
> I can see a clever use of crossed needles in a PA to display "DC power
> input to the final", which might be of dubious usefulness given the modern
> PEP style power limit, but would have been the hot ticket back in the day.
>
> ANother clever use would be to create a faceplate that has "safe operating
> area" marked on it.
>
>
>
>
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--
Jim K0XU
jim@rhodesend.net
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