valve jr ver1 died

[tmp914]

Hi all my name is Tom, im new here and im having a problem with my vjr, i was playing full bore=p~ and all of a sudden no guitar sound, just a medium loud hum and the volume control would not lower hum. any help will be appreciated

[layboomo]

Hi all my name is Tom' date=' im new here and im having a problem with my vjr, i was playing full bore=p~ and all of a sudden no guitar sound, just a medium loud hum and the volume control would not lower hum. any help will be appreciated[/quote']

 

That's kinda hard to troubleshoot without seeing it...but my first guess would be an open resistor which can give you that kind of hum.

[tmp914]

output transformer is also very hot to the touch

[layboomo]

Have you opened it up and looked at the PCB for any obviously burned out components?

[tmp914]

yes it all looks good

[m-theory]

Output tube

[layboomo]

Output tube

Yup that was my next suggestion too m-theory......try a new el-84 it might be that simple.....although many times a bad tube takes the bias resistor out with it!

[fenrirlupus]

output transformer is also very hot to the touch

then why'd you touch it?

 

let it cool off first... i don't know much about amplifiers but things have stopped working for me and wouldn't work if i tried restarting them, but after leaving it sit for a day or two...

[Eracer_Team]

For power transformers and output transformers should not get very hot... very warm in a very warm environment but not hot.

Very hot usually means the lacquer in the transformer is on the verge of shorting out.