[ARC5] BC453 on 24V - screen voltage

Kenneth G. Gordon kgordon2006 at frontier.com
Tue Dec 10 18:17:02 EST 2019


On 10 Dec 2019 at 22:43, Hubert Miller wrote:

> You measured the HFO plate voltage with 30 VDC supply ?
> -Hue 

No. 

I measured the HFO plate voltage with the 250 Volt supply...actually, 236.8 VDC from my 
home-brew power supply.

In other words, with the 250 VDC from the dynamotor applied to the receiver's +HV 
connection, the HFO is operating on a plate voltage of very close to 30 VDC.

And, furthermore, so is the BFO.

I suspect the HFO is operating at such a low voltage in order to keep drift to a minumum.

Ken W7EKB


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