Retrograde reverse polarity

[teknoman2]

I just order an retrograde and I was thinking using PNP instead NPN transistors just like the original.
I will reverse all the caps and feed the board with -9v probably wont face any issues.
Should I make any other changes?
Also regarding the audio transofrmer If I use different ratio turns will be noticeable audio difference?

Cheers,
Panos.

[teknoman2]

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