"Crushed Glass" 12 volt submini tube noise maker

[frequencycentral]

This is my entry into the FX-X over at the DIY Stompbox Forum.

Theme: Design and build a circuit the ultimate noise effect.

Two low voltage tube oscillators intermodulating. I guess the two pots would work well as an XY joystick.

I used 6111 submini tubes, 12AU7 should work too -just change the pinout. The two heaters are in series.

Soundclip: http://www.aronnelson.com/DIYFiles/up/C ... Sample.mp3

Processed - just a bit of WEM Copicat for 'atmosphere'.

[EPA]

hi there...
short question: what kind of wave is going out from a single oscilllator stage?
to my ears it doestn sond like an squarewave...

Best Regards

EPA

[frequencycentral]

hi there...
short question: what kind of wave is going out from a single oscilllator stage?
to my ears it doestn sond like an squarewave...

Best Regards

EPA

It's kind of a pulse with roughly 15% duty cycle.

[marmora]

Finished my Crushed Glass today!

Sounds great...well, it sounds great if you like noise!  It's loud, it's nasty -  I love it!  Fans of the Atari Punk Console or similar designs will not be disappointed.
I changed the value of C4 to .1uf.  I just wasn't hearing enough change with the original value.  With each frequency control all the way down, the sound cuts out.  Good for a quick on/off control, or so that you can hear one oscillator at a time.
I'm running it at 12v, but I tried 9v to see how it would sound and it works - the tubes just aren't coming to life the same way and the volume is lower.
This would be a great building block for a tube synth or for noise makers.

Here's the layout I used:
http://www.aronnelson.com/gallery/main.php/v/marmora/crushed+glass.jpg.html

I used an IC to show where the tube goes.  Pin 1 of the IC is pin 1 of the tube etc.

Thanks Rick (frequencycentral)!

[pompatrocity]

That sounds awesome.