Picking a audio transformer for an Octavia?

[carboncomp]

Iv saw a few different ones mentioned on schematics and other layouts, mainly 42TU011, 42TM022 and LT44, is there a big difference or just form-factor?

Do we know what was in the original?

[Kevin Mitchell]

Do you mean the Tycobrahe? Pretty sure it uses a 42TM022. Or at least an exact equivalent.
There's many, many versions of the Roger Mayer Octavia circuit. The one that was made famous by Hendrix used a ferrite transformer & germanium transistors. But that's never talked about. After many renditions and change of transistors & transformers, the later Octavia units (called The Rocket) used silicone transistors and no transformer - they don't sound good at all in my opinion. The Tycobrahe is our go-to for the classic sound and is more-or-less the best of all of the versions.

Search the history of the Octavia, maybe you'll find what you're looking for. Bring a life-line rope so we can pull you back out of that rabbit hole 

[carboncomp]

Search the history of the Octavia, maybe you'll find what you're looking for. Bring a life-line rope so we can pull you back out of that rabbit hole 

Yeah was the Tycobrahe I was looking at, I guess the key is the centre tap more than impedance or getting an exact 3:1 ratio from what I can work out from how the pedal seems to work.

If I tug on the rope 3 times, pull me up! 

[iainpunk]

one of my oldest experiments was a transformer octave fuzz, using a standard mains transformer's 6v side as the primary and 230v side as the secondary. it had huge output level, so i had 40dB of static reduction to keep it in check, but even the simplest transformers can work for such circuits

cheers

[pacealot]

Having read the old stories of how Roger Mayer first used ferrite core transformers in the earliest Octavia(s) — and then blundering into some gut shots of his relatively recent Purple Haze pedal, which shows a halo inductor-type trafo — this now has me wondering how difficult it might be to actually wind one from scratch using a (relatively) commonly-available wah-type pot core. Not saying it would be worth it for anything but the thrill of experimenting and being able to say you tried, but I suppose stupider things have been done in the name of science...