[sdiy] Tube ring mod

[metasonix at earthlink.net]

> Um... I don't HAVE a EFP60 tube around... you've got a datasheet anywhere???

No problem:
http://www.mif.pg.gda.pl/homepages/frank/sheets/030/e/EFP60.pdf

Dealers such as Chelmer and Billington will have the valves,
and the special sockets for them. Easy to find in Europe,
more difficult in the US.

> Pentodes as such really seems my preferred tube for linear stuff. Toss in
> another grid for multiplicative stuff... right? ;O)
> Maybe I should start of with a Svetlana 4CX15000A tube? Or should I go straight
> for a TWT or a MSDC Klystron?

That is kid stuff. You need a backward-wave tube, or perhaps the fearsome Ubitron.

Yes boys and girls, your next modular synth must use an Ubitron.
Fast-wave is where it's at. Yee-haw.

 >Next, shall we discuss the use of big DIY spark-gap transmitters to
 >make cool sparking, and other, noises for really nifty special effects?

Hey man, spark gaps are Victorian. Only redneck hobbyists still drive Tesla
coils with spark gaps. Get out of the 19th century, try a vacuum tube.
Use a 4CX15000A! Hahahahaha!