LDO version Demo - by Barry by GuitarPCB.com published on 2013-03-29T16:04:12Z This is the LDO version of the LDO/RTO circuit board from GuitarPCB. Les Paul into clean Fender Twin Amp. This circuit version is designed to emulate the Landgraffe OD. Comment by GuitarPCB.com Tone Knob Cenetr at 12:00 2013-03-29T16:07:55Z Comment by GuitarPCB.com Tone knob 11:00 to Bass side. 2013-03-29T16:07:24Z Comment by GuitarPCB.com Les Paul into clean Fender Twin Amp. 2013-03-29T16:05:46Z