[sdiy] Tubes in Synths [ was : Harry's Nightmare! ]

[GothGeek Sysadmin]

On Thu, Nov 08, 2001 at 08:22:41AM +0200, Dave Krooshof wrote:
> I do think that it will be a short delay, tubes are quick.
> But as it's built up so discretely, you can set individual
> delays between the steps, and individual mixes of 'feedout',
> 'feedthrough' and feedback per "fireman".
> This will be _expensive_.

Expense has come to mind, to keep it small keeps it expensive[1].
I lucked out and found a bunch of RCA 6112s.  Not enough to do more then
play with a couple stages, but I'm still fascinated with the idea of
seeing it work.

On a related note, I found a schematic for an old tube opamp which
is I think one of the first packaged opamps made.
http://www.themusic.net/schematics/tube-opamp.gif

Even if a full tube BBD is a ludicrous idea, I dont think tube VCAs
are a bad idea at all[2].  I wish I had more experience with the extremely
low voltage tubes.  My tube experience mostly comes from my collecting
of WWII radios and 50s/60s guitar amps.  For some reason the real deals
always need some work...

[1] Ok. To build it the size of a house would also make it expensive.
tubes just arnt cheap anymore unless you get real lucky.
[2] I know Metasonix is doing some *really* cool tube synth stuff, but
whats the fun in just unwrapping and plugging something in?!?  I mean, I 
might have time to do music and the world isnt ready for that!

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