Hello I've tried to do this guitar amp: http://www.redcircuits.com/Page52.htm
I've separated the preamp stage from the power amp stage and the problem that I have is that the preamp works correctly without any problem but when I connect de power supply to the power amp stage the fuse (1,6A) blows quickly, I've measured with the Ammeter and it gives me a measure of 6A!!!!! I have to say that the transistors are all in the correct position and with a good heatsink (designed for 20W)........who can be the problem?
Anyone has tried to assemble this amp? I'm start to think that the schematic is not correct......
Salu2.

Hello, at first place sorry if my english is not good but I hope that anyone can understand me well.......
I have seen many schematics of JFET preamps here in the forum and I am new at building preamps, that's cause I do this question. I don´t know what to do to bias correctly a preamp. Anyone can help me?
Thanks.
Salu2.