Soundcfaftsmen A5002 power amp *FULLY SERVICED*
Soundcraftsmen A5002 power amp
class H with Auto-buffer circuitry
SERVICED:
-cleaned pots and switches with deoxit
-replaced all electrolytic capacitors with quality low noise capacitors
-replaced the 4 large power capacitors (these are large and expensive)
-replaced input transistors with matched differential pairs
-replaced diff current source transistors
-replaced bridge rectifier
-replaced triac
-replaced speaker switch
-installed C13 power cord socket (comes with 14 awg cord)
-painted panels and replaced screws
-set transistor bias current
-tested THD, S/N, and monitored temps during playing sessions.
This amp got the full treatment with all new electrolytic capacitors. The capacitors in the audio section are Nichicon LK capacitors. The four large power capacitors are increased in both voltage and capacitance ratings, as well as higher current and life/hour rating.
The input differential transistors and current source transistors are upgraded modern transistors from ON Semi/Fairchild, made specifically for audio frequency and low noise. Much more linear in the current range that's used than the originals are.
A C13 power cord socket was installed with included 14 awg cord. This makes it much easier to move, and the increased wire gauge adds about 15W clipping headroom to each channel over the stock 18 awg cord. I also repainted the covers and handles. There is a slight bit of corrosion on the face-plate that can be seen in a certain light reflection, usually can't be seen.
Specs:
250W per channel 8 ohm, 375 per channel 4 ohm
2 ohm stable
110dB S/N
slew rate 50V/uS
Soundcraftsmen A5002 power amp
class H with Auto-buffer circuitry
SERVICED:
-cleaned pots and switches with deoxit
-replaced all electrolytic capacitors with quality low noise capacitors
-replaced the 4 large power capacitors (these are large and expensive)
-replaced input transistors with matched differential pairs
-replaced diff current source transistors
-replaced bridge rectifier
-replaced triac
-replaced speaker switch
-installed C13 power cord socket (comes with 14 awg cord)
-painted panels and replaced screws
-set transistor bias current
-tested THD, S/N, and monitored temps during playing sessions.
This amp got the full treatment with all new electrolytic capacitors. The capacitors in the audio section are Nichicon LK capacitors. The four large power capacitors are increased in both voltage and capacitance ratings, as well as higher current and life/hour rating.
The input differential transistors and current source transistors are upgraded modern transistors from ON Semi/Fairchild, made specifically for audio frequency and low noise. Much more linear in the current range that's used than the originals are.
A C13 power cord socket was installed with included 14 awg cord. This makes it much easier to move, and the increased wire gauge adds about 15W clipping headroom to each channel over the stock 18 awg cord. I also repainted the covers and handles. There is a slight bit of corrosion on the face-plate that can be seen in a certain light reflection, usually can't be seen.
Specs:
250W per channel 8 ohm, 375 per channel 4 ohm
2 ohm stable
110dB S/N
slew rate 50V/uS