[AMRadio] AM from what I have in the junk box

[Todd Bigelow - PS]

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