[Milsurplus] TCS Receiver on High Voltage DC-DC Brick

[David Stinson]

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.

https://photos.app.goo.gl/6j3H8cdxRsGxVJdY6

Upsides:  
Easy-peasy regulated B+ supply.
TCS is best with regulated B+
Run the whole radio off 12VDC.
Cheap.  Tiny thing.

Downside:
RF noisy, so it must be shielded
with filtered leads in/out.

GL OM ES 73 DE Dave AB5S