The phono section on function board C:
C144, 149 (10µF/25v)(signal path): Replaced with Nichicon ES Muse 10µF/35v bi-polar.
C163, 166 (22µF/16v)(signal path): Nichicon ES 22µF/25v.
C158 (100µF/10v): Panasonic FC 100µF/25v.
C164, 165 (330µF/16v): UCC KYB 330µF/25v.
C157, 159 (2200µF/6.3v): Nichicon FG 2200µF/6.3v.
The Q120 voltage regulator transistor got a heat sink attached. Since the Tuner/Tape Buffer (input) board stands right behind that transistor with very little clearance I had to get a little creative there. The heat sink is a section cut from an old PC northbridge heat sink. I figured that any kind of heat sink had to be better than nothing.
Cheers,
James
edit: I forgot to mention 2 things.
1) The entire board was re-flowed.
2) Throughout the entire amp when a coupling cap was used in the signal path I replaced them with a Nichicon ES Muse bi-polar cap (with a couple of exceptions where I used a KZ Muse). In spite of them being bi-polar I dimly remember reading somewhere that there is an orientation to these caps and it's best to install with the longer lead in the former positive hole/position, so that is what I do. If only I could remember the reasoning behind the practice.
C144, 149 (10µF/25v)(signal path): Replaced with Nichicon ES Muse 10µF/35v bi-polar.
C163, 166 (22µF/16v)(signal path): Nichicon ES 22µF/25v.
C158 (100µF/10v): Panasonic FC 100µF/25v.
C164, 165 (330µF/16v): UCC KYB 330µF/25v.
C157, 159 (2200µF/6.3v): Nichicon FG 2200µF/6.3v.
The Q120 voltage regulator transistor got a heat sink attached. Since the Tuner/Tape Buffer (input) board stands right behind that transistor with very little clearance I had to get a little creative there. The heat sink is a section cut from an old PC northbridge heat sink. I figured that any kind of heat sink had to be better than nothing.
Cheers,
James
edit: I forgot to mention 2 things.
1) The entire board was re-flowed.
2) Throughout the entire amp when a coupling cap was used in the signal path I replaced them with a Nichicon ES Muse bi-polar cap (with a couple of exceptions where I used a KZ Muse). In spite of them being bi-polar I dimly remember reading somewhere that there is an orientation to these caps and it's best to install with the longer lead in the former positive hole/position, so that is what I do. If only I could remember the reasoning behind the practice.
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