sonolink
Well-known member
Hi guys,
A friend asked me if I couild fix his Hughes & Kettner Staesman Quad EL84. The amp would loose sound after a few minutes of playing. I replaced the tubes and the amp is now working ok, I've had it on for more than an hour and it sounds fine BUT the Bass knob doesn't seem to work or do much. So I wrote to H&K and they sent me the attached service manual with the preamp schem but TBH I'm a bit lost here...
Can someone please help me pointing me in the right direction towards what/where to look for?
Thanks in advance
Cheers
Sono
A friend asked me if I couild fix his Hughes & Kettner Staesman Quad EL84. The amp would loose sound after a few minutes of playing. I replaced the tubes and the amp is now working ok, I've had it on for more than an hour and it sounds fine BUT the Bass knob doesn't seem to work or do much. So I wrote to H&K and they sent me the attached service manual with the preamp schem but TBH I'm a bit lost here...
Can someone please help me pointing me in the right direction towards what/where to look for?
Thanks in advance
Cheers
Sono
