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
-painted panels and replaced screws
-set transistor bias current
-tested THD, S/N, and monitored temps during playing sessions.
This amp got all new electrolytic capacitors. The capacitors in the audio section are Nichicon 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.
Paint was touched up around face edges and rack mount holes
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
-painted panels and replaced screws
-set transistor bias current
-tested THD, S/N, and monitored temps during playing sessions.
This amp got all new electrolytic capacitors. The capacitors in the audio section are Nichicon 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.
Paint was touched up around face edges and rack mount holes
Specs:
250W per channel 8 ohm, 375 per channel 4 ohm
2 ohm stable
110dB S/N
slew rate 50V/uS
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