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MP1blowing main fuse

My MP 1 has the upgraded power supply and is blowing the main power fuse, 2.5a, about 5 seconds after the power switch is turned on, about the time you normally see the offset LEDs illuminate. Checked all tubes, found 1 bad one of the regulator tubes , but not the problem. Any suggestions prior to sending in for repair, maybe the filament diode bridge?
Mark


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Topic - MP1blowing main fuse - MVA 12:12:58 05/26/14 (9)

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