[ARC5] Running receivers at low B Voltage

Ken Kinderman scr274 at gmail.com
Sun Sep 7 11:20:26 EDT 2025


Has anyone had experince with receiver HV lower than the nominal 235 VDC
dynamotor output? I like to run everything at or slighly below ratings. Not
interested in squeezing out every last watt from the transmitters, etc.

So except for the times I am using the dynamotors, I run the receivers in
the test jig and out of the racks at about 175VDC, transmitters at about
540VDC. (By the way, even 175VDC is enough to blow the .05's, so I am on a
long term quest to replace all, either with re-stuffed cans or just wiring
them in. Otherwise, letting them fail is like playing condenser
Whack-a-Mole)

My question is about the receivers... aside from maybe the 12A6, are there
any downsides to lower overall plate voltage?

Thanks

Ken
W2EWL
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