Tube synth diy

Off looking at the pictures now :)  

I'd love to do one as if it had been built back when tubes were usually used
- wood panels, or back-painted perspex, bakelite knobs and so on.

Ken

>Hi all
>looks like my first post describing this synth has disappeared
>so try again.
>
>finished first rack of a tube modular.
>pics in Photos.
>I am planning to build a few of each module so designed and etched
>circuit boards for the circuits.
>
>Eric Barbour VCO - works fine
>
>Beat Frq VCO - I built an EB VCO and changed the cap around the
>thyratron to get the operating range around 20-30kHz. The output goes
>into a 6AR8 modulated by two neon oscillators set to run at 25kHz. It
>"kinda" works but needs some sorting. Neon oscillators are apparently
>quite unstable above 10kHz, which I view as a good thing, at the
>moment it seems they only fire at certain settings, maybe too
>unstable.....anyway, debugging to do.
>
>Rene's VCF - built two of these, both with sync-able neon LFOs, the
>idea being the flashing neons drive the LDRs in the filter circuit and
>I get a LFO output too. The neons and LDRs came from some old HP lab
>gear, so I figured they should be fine. One is, but the other isn't,
>which probably indicates a wiring error. I used 6021 sub-mini tubes
>for the triodes and 6AU6 for the pentodes. The 'scope shot is from the
>VCF that works, it sounds as nasty as it looks, I like it!
>
>Electronic Peasant VCA/Mixer 2&3. If you have seen this design it is
>the one with the 600:600 Ohm transformer on the output. It works
>perfectly! I think I might try a few more EP designs
>
>Power supply is +/-140V, but I will increase the output to ~160 or so.
>heaters are powered by a switching PSU from a computer, just added a
>pot to get 6.3V from it at 20A.
>All sockets BNC, today I built an interface panel to send/rec signals
>with my other synths. 
>
>cheers
>Andrew
>
>
>
>------------------------------------
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>Yahoo! Groups Links
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_______________________________________________________________________
Ken Stone   sasami@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>