I have been fiddling with this thing for about 6 months. Cant get it to quite work. So I'm systematically going through it to get the "bugs" out. Here is my first question. On my first stage preamp valve, When I look at the triode 1 which is the first valve the guitar hits, the oscope shows a clean signal after the coupling cap with a 1 meg pot. As soon as I connect the grid of the second triode to the wiper of the pot I get a reduction of the signal and some clipping of one half of the wave. Any Ideas?