60’s Tube Organ Tear Down and Recycle

[abbey road d enfer]

The "tubes" are probably neon lamps used as perhaps a sawtooth oscillator.

https://en.wikipedia.org/wiki/Pearson–Anson_effect

Bri

Indeed they are. The circuit is a frequency divider.

Looking again at the pic showing apparently neon bulbs, I count 12 very similar sections. Top octave generator? But how is it tuned....lol

Bri

They don't need to be tuned, since they follow the ùaster oscillator. Each section is a divide by two. The master oscillator delivers the top octave and the dividers deliver the octaves below.

 

[Brian Roth]

I am far from an electronic organ expert, but SOMEWHERE in that Conn is a top octave generator. The card with the neons seemed logical since it had twelve "identical" sections. Just guessing that the portion with the multiple 12AU7 bottles were the octave dividers.

Shrug.....

Bri