Hello Don, etc
Yesterday I received the following from a member of the TCS-Radios group on Groups.io.
"They seem to have improved those little yellow
High-Voltage DC-DC converters, sourcing enough power to make
them more useful. You can find'em on Ebay and Amazon
for 8 or 10 bucks, like this one:
https://www.ebay.com/itm/183717171988
They spec them for 20 Watts continuous. Recently
got a couple and decided to try one on a newly-
revived TCS receiver. Set the output for 190V.
At that B+ the TCS draws about 70 mills at full
volume, about 13 Watts. Ran it for
a couple of hours and the FET never got beyond
comfortably warm to a fingertip and the
heatsink remained cool."
I see they do bigger modules up to 450V too.
73
Roger/G3VKM