hello, this is my first post, ill try to be brief and descriptive . Ok, i have an old RCA tube amp pulled from a hifi, (vintage 50's or so) it uses 6cg7's (new EH's) in the preamp and 6v6's (old, came with the amp when i got it) in the poweramp, with a 5y3 rectifier (which i replaced witha ss plug in thing, cause it didnt have one when i got it). I was planning on converting it into a guitar amp, but im having trouble getting sound out of it... i hooked a guitar through the phono input, i get a signal, but its very weak. I used a distortion pedal as a boost, and the sound was louder, but not much. Would I have to re-do the input section of the amp to make it suitable for guitar?