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Gswitz

Bronco amp issue

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Old 72 amp going quiet after 15 minutes.

 

What causes this?  Could be transformer? 

Can i fix this myself? 

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my first thought would be the power rectifier tube is fritzing, or the power supply caps are on the way out. doubtful it's the transformer. one option would be to swap out the four (4) tubes for a new set. if you'd don't have electronics repair skills - then take it to a proper shop for repair because changing out components can make things worse if not done correct - product choice and installation etc. 

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