1 V per octave Tube VCO

[Magnus Danielson]

From: sasami at blaze.net.au (Ken Stone)
Subject: Re: 1 V per octave Tube VCO
Date: Wed, 27 Dec 2000 20:25:45 +1100 (EST)

> >    Far out.....  One of these days, I will have to make a venture into the
> >Hollow State...
> 
> Go for it. I'm having more fun and getting more unique sounds with tubes
> than I have from semiconductors of late. Definitely worthwhile. 
> 
> It took the ideas of three people to come up with the 1 V/oct VCO. Imagine
> what would happen if more members of the list contributed.

Scary.. ;)

Good work!

Now, have you checked out Rene's tube expo curcuit? It would be
interesting to see this curcuit in a all-tube setup. It should not be
that hard to replace the op-amps with tubes. Naturally one has to
calibrate the offset.

Now, tapping out on thin ice here (yeah, the ice is thin in Stockholm,
so I am not considering doing in real life just yeat), if the cathode
on Rene's ECC83 does not have to see a low impedance, one could run a
ECC83 as the input op-amp with a fairly high output swing, have that
balance trimmed and then just use a resistor divider to divide down
the swing and also the offset error. Maybe someone could enlight me
what is seriously wrong with this plan.

Anyway, that way you would get a 3/2 ECC83 input setup.

Any takers? Eric? Rene?

Cheers,
Magnus