Vco for 303

[jackdamery]

I found this schematic for the 303
http://machines.hyperreal.org/manufacturers/Roland/TB-303/schematics/roland.TB-303.schem-5.gif

It appears to show the vco area but I was wondering
does anyone have a schematic for just the vco of the 303 with the CV input, and output labelled?

[LektroiD]

[joshco]

Rene Schmitz has a simple cmos 4069 VCO which has a very rich sqare wave. I dont own a TB but this VCO sounds pretty close to it.
http://www.uni-bonn.de/~uzs159/vco4069.html

[Lorenzo]

[joshco]

[iorobyy]

if you're interested for a good tb303 clone look in http://www.tb303.at/
vco2.
is a modifications for the xoxbox but can work stand alone without problems.

[jackdamery]

[iorobyy]

sorry i was not clear...is a kit of the 303vco clone as per xoxbox schematic http://www.ladyada.net/media/x0xb0x/mainboard_beta.png that is very similar to tb303 vco structure

[jackdamery]

Is there a schematic for the vco2 though without any of the surrounding 303 electronics?

[iorobyy]

The schematic of the vco2 is exactly the same as the circuitery of xoxbox vco that is very similar (again almost exactly the same) of the original tb303 vco
print xoxbox schematic + print original tb303 schematic from the links posted.
Studying both vco's circuiteries (check the similar parts) you must to found all you need.
If you are in difficult to read schematics maybe try to ask the original vco2 schematic from the .au site.

[iorobyy]

try also the oriental guru mr.takeda


http://www.aleph.co.jp/~takeda/radio/harvest/img/schem/DualTBVCO3a-schem.gif

[furio]

[jackdamery]

furio have you got a schematic for the vco2?

[furio]

[jackdamery]

Where can you buy them from? I can't find anywhere on their site to buy stuff.