Hi Faringdon,
All the 601's I used just worked for about 20 years....
A few thoughts...the 601 old enough to justify replacing the electrolytics.... c4,5,8,9,10,11,15,20,21 plus the psu and vng card
is vr4(?) the unity gain setting trimpot ok?
does the mismatch change with different front panel settings?
cheers
Tim
All the 601's I used just worked for about 20 years....
A few thoughts...the 601 old enough to justify replacing the electrolytics.... c4,5,8,9,10,11,15,20,21 plus the psu and vng card
is vr4(?) the unity gain setting trimpot ok?
does the mismatch change with different front panel settings?
cheers
Tim