Burning Fuses

[Enzo]

Those two green wires that go to the pilot light are the 6VAC winding, disconnect them adn try again. The whole point of disconnecting all the wires was to have the transformer working alone, not connected. If that pilot light socket were shorted for example, that would blow the fuse.

If AAAALLLLLL the wires are disconnected - not just the convenient ones - and the thing blows fuses, then yes, the transformer would seem bad.

But do please do what was suggested above - aapply power - through a fuse - to the transformer primary alone - NOT through the amplifier switch and fuse holder etc. That is the ultimate test. A switch shorted internal to its frame or a shorted cap across teh mains or whatever could also be blowing fuses.

[Rick1114]

Okay I disconnected and taped the green heater wires. That left only the wire going to the switch and BOOM - still blowing fuses. I would say it's pretty much the transformer at it this point as I can still smell the burning aroma on it.

What is the best route for replacing a PT in a vintage GA-5? Can the PT be fixed or is there a suitable replacement on the market? I think part of the GA5's sound is the underpowered PT from what I've read.

Any thoughts?

Thanks,

Rick

[Rick1114]

How about this one? It's priced right - I'm just not sure if it's a "drop in" replacement since it's for the re-issue GA-5. Any thoughts?

http://www.mojomusicalsupply.com/ite...8&id=MOJO779sp

Vintage GA-5 Schematic
http://www.informatik.uni-bremen.de/~dace/gg/GA-5.pdf

Thanks,

Rick

[metalangst]

That should work. If the burn smell is from the transformer, that's the sniff test. check the mounting hole dimentions. And build a current limiter. The old transformer may have gone bad due to a short in the amp, you don't want to fry the new transformer.