[R-390] Meter conversion resistor question

[Perry Sandeen]

There has been considerable discussion about using 100 ohm resistance replacement meters.

My question is does one really need the original style carbon comp or WW pots?  At the time these
radios were designed the trim pot hadn’t been designed.  What is the actual power dissipation of
the circuit?  Could one use the cermit trimmers that are available or a fixed resistor and a
cermet trimmer?  They are much less expensive and much more available.  Education appreciated.

Regards, Perrier


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