Tourmaster help

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rgprestige1570

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I bought a tourmaster about 3 months ago and earlier today it blew the fuse. I tried replacing the fuse and sadly it blew again. I am relatively inexperienced working on tube amps, so I would like some advice about the best course of action to trouble shoot this. Would it be best to remove the tubes and see if it still blows another fuse to determine if its simply a bad tube?

I also noticed when I took the back panel off that one of the metal sleeves that houses 2 of the tubes was loose so I twisted it back into place...could this possibly cause the fuse to blow if the metal sleeve made contact with metal inside the amp? Thanks in advance!
 
I had a similar experience with my tourmaster. The culprit was a bad set of output tubes. The problem is though, that the power tubes also took out two resistors, and a few diodes in the power supply. I had the exact same symptoms, so it might be time to take that in to a tech. Shouldn't be too much to fix it.
 
Bad power tube will take the fuse. Not sure about the metal sleeve, but I'd put in a new set of power tubes and fuse and bias it up and see if it works. Start with the simple stuff first. Good luck and keep us posted.
 
The loose sleeve will absolutely not cause a fuse to blow. The shields are just there to cut down on noise/microphonic noise in the amp. The first thing to try is to pull out all of the power tubes(preamp tubes can stay). Not to offend you, but you said you are pretty inexperienced, so the power tubes are the big ones without the shields. When you have those out, put in a new fuse and turn the amp all the way one(power on, and in play). If the fuse doesn't blow, then you've just got a bad tube. If you want to figure out which one is bad, just put 2 tubes at a time back in, and repeat this process. You should always put in either the inside pair of tubes, or the outside pair of tubes for this test though. If you've got any questions, just shoot me a pm on here.
 
Thanks everyone. I am about to go buy some more fuses and see what happens when I remove the power tubes. Got my fingers crossed its just a bad tube!
 
Ian Egnater":ft2xhbxx said:
The loose sleeve will absolutely not cause a fuse to blow. The shields are just there to cut down on noise/microphonic noise in the amp. The first thing to try is to pull out all of the power tubes(preamp tubes can stay). Not to offend you, but you said you are pretty inexperienced, so the power tubes are the big ones without the shields. When you have those out, put in a new fuse and turn the amp all the way one(power on, and in play). If the fuse doesn't blow, then you've just got a bad tube. If you want to figure out which one is bad, just put 2 tubes at a time back in, and repeat this process. You should always put in either the inside pair of tubes, or the outside pair of tubes for this test though. If you've got any questions, just shoot me a pm on here.
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So I removed the power tubes and put a new fuse in. No luck- still blew the fuse. Any ideas what to do now? Seems like I need to take the amp to a tech at this point.
 
So I talked with a tech and he said the transformers are notorious on these amps and that is most likely my issue. We are going to check and see if that is the case tonight. If so...how much is a new transformer going to run me? This seems redic!
 
I doubt it is the transformer. I bet the power tubes took out the rectifier diodes and the screen resistors. Keep us posted, I'm curious.
 
My tech determined it was the power transformer. Basically he disconnected some wires located inside the amp (secondary wires) to determine whether or not it was the PT. Amp still blew the fuse which indicates that it is the PT. He said mine is the 4th TM he has seen where the PT went out.
 
rgprestige1570":xh85lh4v said:
My tech determined it was the power transformer. Basically he disconnected some wires located inside the amp (secondary wires) to determine whether or not it was the PT. Amp still blew the fuse which indicates that it is the PT. He said mine is the 4th TM he has seen where the PT went out.
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Contact nate@egnateramps.com directly. He is our customer service manager, and will be able to advise you on this. Do not pay out of pocket for a new one, unless you have talked to him.
 
Ian Egnater":1gvo28de said:
rgprestige1570":1gvo28de said:
My tech determined it was the power transformer. Basically he disconnected some wires located inside the amp (secondary wires) to determine whether or not it was the PT. Amp still blew the fuse which indicates that it is the PT. He said mine is the 4th TM he has seen where the PT went out.
Click to expand...


Contact nate@egnateramps.com directly. He is our customer service manager, and will be able to advise you on this. Do not pay out of pocket for a new one, unless you have talked to him.
Click to expand...


Thanks for the information Ian! Would you happen to know whether or not the newer transformers are upgraded as to avoid such a problem in the future? The tone on this amp is just so amazing that I wouldn't want to run into the same issue twice and have to use my backup again!
 
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