amr2
Well-Known Member
Hello
I will start with this tank the next week. The amplifier is in good shape, it needs a general cleaning and some minor restorations. This model uses a (noisy) rear fan to force air when it gets hot (TH >60ºC). I will change it for a quieter model.
Now the bad part...it has a weak channel. Three output transistor and one driver are shorted. I’m thinking about using these replacements:
2SA968B/2SC2238B -> 2SA1837/2SC4793
2SA1516R/2SC3907R-> 2SA1492/2SC3856 or 2SA1962/2SC5242
I will have to change all the output transistors (5+5 per channel), I don’t like to mix old parts with subs, and although they measure fine, they can be stressed.
If anyone has used other closer replacements please post it...
I will upload photos!
I will start with this tank the next week. The amplifier is in good shape, it needs a general cleaning and some minor restorations. This model uses a (noisy) rear fan to force air when it gets hot (TH >60ºC). I will change it for a quieter model.
Now the bad part...it has a weak channel. Three output transistor and one driver are shorted. I’m thinking about using these replacements:
2SA968B/2SC2238B -> 2SA1837/2SC4793
2SA1516R/2SC3907R-> 2SA1492/2SC3856 or 2SA1962/2SC5242
I will have to change all the output transistors (5+5 per channel), I don’t like to mix old parts with subs, and although they measure fine, they can be stressed.
If anyone has used other closer replacements please post it...
I will upload photos!
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