OTL Asylum

OTL, Output Transformerless Amplifier User Group.

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RE: Schematics (1 of 2)

Posted by cellai@space.it on June 16, 2008 at 01:41:00:
I think the present OTL amplifier scheme (one channel) could be a good OTL amplifier too (with clean channel only).

In fact the design comes out from my previous experience with the construction of an OTL guitar amplifier.

Just add a 12AX7 input gain stage to boost the guitar pick-up signal to about 1V.

Likely due to the generous power supply I have noticed no weird effects (even under severe clipping) and the distortion comes out softly (when approaching overdrive).

The 500 VA transformers (not a VA less!) should also guarantee plenty of 'sustain' to your guitar.