Jim Isbell wrote:
Brett Gazdzinski wrote:
I would not build a transmitter because I had some tubes, but did build
one because I had a nice mod and power transformer...the push pull 812a
rig...
Well, I build to match my tubes, not because it is efficient or
inexpensive, but because it is esthetic. I am building a linear for
the S-Line using a single 4-1000A. Not because its the best way to
go, but because I can think of no better tube to have behind a window
to look at while sitting in a cold shack.....well, cold before I
turned on the Linear.
I am using the window out of a microwave door so that the entire
inside of the linear is visible from the front.
I am still looking for something to use the 833A in because it is a
humongus beautiful tube to look at. Someone answered this thread
suggesting two 4-125As modulating the 833A and that has a good "look"
to it. I could use a "hurricane" candle chimney for a cooling chimney
on the 833A.
Considering the funky mounting system used by the 833, you could build
up a really nice chassis with a pair of 4-125s in the foreground, drive
between and behind them, and the 833 mounted on the wall behind and
above the chassis, along the lines of the old Gates BC-1* type
transmitters. Give yourself a large, square window and admire your
handiwork when you throw the switch and everything lights up. You can
always do something similar with the rectifiers using a window down
below too, just use 3B28s instead of 866s or 4B32s in place of the 872
series. Then you won't have the warm up/arcing issues of the mecury
vapor tubes, although the replacements aren't quite as purty.
Somewhere I have the plans for a Jacob's ladder, using a neon sign
transformer. Talk about waaaaay down the list of 'things to do'.
~ Todd KA1KAQ
