[TowerTalk] Cross needle meters

[Jim Lux]

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.