In article ,
Larry wrote:

Bruce in Alaska wrote in news:bruceg-
:

I even remember when we used 866A's in the Power supplies, as
Recitifiers.



Yecch.....flashovers! Been there, done that....

Bruce, have you seen what an AM transmitter looks like, now? A 50KW AM
broadcast transmitter uses POWERTAB transistors for final output stages!

http://hawkins.pair.com/wabcnow/wabcn14.jpg

That little board puts out 1KW with 240VDC applied...

Amazing. A 50KW broadcast transmitter cooled with muffin fans....55KW from
the power company...50KW to the antenna!


No, i really haven't kept up on Broadcast Engineering, since I left that
field in the late 60's, in a previous life. I understandf that some of
the newer Transmitters using Class D & E Amps are very efficent and
compact in the extreme, compared to what I was working with.

Bruce in alaska
--
add a 2 before @