Less gain is the biggest thing you will notice.  You can mitigate that by adjusting the screen voltage divider (just short a resistor as I recall).  I have run 60 to 70V satisfactorily (from 9V batteries) and still had enough audio for driving a speaker.

Dennis AE6C

On Sun, Sep 7, 2025 at 8:23 AM Ken Kinderman <scr274@gmail.com> wrote:
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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