spuncut skrev:Hej Niels-Ole
Det er svært liiige at komme med et bud på, men prøv om du kan høre forskel på de to kanaler. Det ka' da selvfølgelig også være aldrende lytter der forvrænger i begge kanaler. Har du justeret bias og DC-ballance? Er der rippel på forsyningen?
MVH Henning
Hej Henning I Følge en Manual på Nettet Skal Man justerer Bias Via P2
her er et Udpluk af teksten:::::
Bias
Remove the B+ fuse F2. This fuse is in the line from the ’+’capacitor terminal to hole #3 on the board. Connect an ammeter’s '+'
!ead to the fuse clip nearest the large filter capacitors. Connect the ’ - ’
lead to the other side of the fuse clip.
Avoid intermittent connections, and do not short the leads
together.
Turn the amplifier on, and if possible adjust the line
voltage to 120 volts.
Adjust P2, near the middle of the board, to 275 mA. Turn the amplifier off, and when the current drops to
zero, then remove the ammeter and replace the fuse.
Offset
A DC voltmeter capable of resolving 10mV variations is needed.
Connect it to the output terminals of the selected channel,
and adjust P1, near the top of the board, P1 KAN JEG IKKE FINDE
to zero volts, + 10mV.
A small correction of the control will produce a large initial change, which will settle down
in a second. Repeat these small changes to achieve zero volts
P1 Kan jeg ikke Se men P2 Er forsejlet HMM WHAT TO DO
UPS LINKER LIGE TIL SIDEN
http://www.hafler.com/pdf/archive/DH-220_amp_man.pdf