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Old 6th April 2012, 04:25 AM   #11
tpageal is offline tpageal  United States
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Join Date: Apr 2011
Location: Decatur, AL
Thanks Eli, well this turned into a project. I didn't test the tubes first and it appears all 4 of the EL34s were bad. I've tested them now and they are all bad, I'll never know if I fried them or they were bad in the first place. After replacing the caps and turning it on there was higher than expected voltage everywhere. I did have a speaker load connected. After 3-4 minutes of the amp being on, one of the output transformer wires burned. That's been fixed by TRS. Jim McShane introduced me to Don Sachs. Jim is putting together a kit for Don to rebuild the whole amp.
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Old 12th May 2012, 02:31 PM   #12
tpageal is offline tpageal  United States
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Join Date: Apr 2011
Location: Decatur, AL
I received my amp back from Don Sachs. He replaced all of the signal path resistors and caps, all parts and Mullard EL34 reissues from Jim McShane. Rebuilt the entire power supply and made a modification to the input stage. Don redesigned the input circuit from the 12AU7 to accomodate a 6CG7. To say I am pleased with the outcome is a gross understatement. This thing sounds incredible. I will post some pictures later.
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Old 14th May 2012, 12:23 AM   #13
tpageal is offline tpageal  United States
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Join Date: Apr 2011
Location: Decatur, AL
Here are a few pics of the complete rebuild. It sounds fantastic
Attached Images
File Type: jpg Pilot AMP 001.jpg (750.1 KB, 45 views)
File Type: jpg Pilot AMP 003.jpg (547.0 KB, 49 views)
File Type: jpg Pilot AMP 004.jpg (560.1 KB, 40 views)
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