#1
I've read about the bias point, and I know what it i, but how do you know where it is at the moment ? How do I know if it is where it should be, and if I change tubes how do I know when it's where it should be ?? I dont get it.... please help me :-)
Gibson Les Paul Standard
Takamine G Series 6&12 string accoustics

Marshall JCM 800 50w 1987 (4 input)
Marshall 1936 Cab

Jim Dunlop CryBaby
MXR 10 band EQ

R n'fn' R!
#2
please help somebody
Gibson Les Paul Standard
Takamine G Series 6&12 string accoustics

Marshall JCM 800 50w 1987 (4 input)
Marshall 1936 Cab

Jim Dunlop CryBaby
MXR 10 band EQ

R n'fn' R!
#3
Tubes have different voltage requirements, the bias is that voltage adjustment. Some amps have trimmer pots so you can adjust it, some have just resistors (fixed bias). Even knowing the suggested bias for a given tube, you can turn the bias up (more voltage=hotter) or down (less=cooler) and that changes the tone of the amp. Too hot and stuff breaks, too cool and your amp sounds lifeless.

If you don't know more about this stuff have someone else change your tubes and bias your amp.
It's a fine line between clever and stupid.
#4
Im changing my powertubes, but I am just gonna replace the old ones with new ones of the same type.. I dont need to rebias the amp for that do I ?

(my first tube amp, and I bought it a week ago...)
Gibson Les Paul Standard
Takamine G Series 6&12 string accoustics

Marshall JCM 800 50w 1987 (4 input)
Marshall 1936 Cab

Jim Dunlop CryBaby
MXR 10 band EQ

R n'fn' R!