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another "BA115 keeps blowing fuses" thread!

#101
agedhorse said:
So, excess current in the output stage is a FAULT that CAUSED the fuse to open. Your tech has confirmed to me that the $160 is NOT simply for replacing a fuse as you suggested.

Without repairing the CAUSE of the fault, all that replacing the fuse(s) will do is cause additional damage while the new fuse blows. It may also expose you to additional hazards. A qualified tech will have the tools, equipment and diagnostic methods to prevent this while troubleshooting.

This is WHY designers (like me) place fuses inside amplifiers, they are not user replacement items. Your example serves as a good reminder of this imo.
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Got it, thanks.. like pulling teeth to get there, but much appreciated.
 
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#103
I have a Ampeg BA112 ver.1 it’s doing the same thing as the BA 115 mentioned. I found so far a shorted rectifier diode the other three 1N5401 diodes are fine one is definitely shorted . I get continuity with the meter probes in either direction.
 

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