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My 1974x amp is quiet when nothing is plugged into it, but as soon as I plug my intrument cable into the non-tremolo channel, I get this awful cyclic noise.  Does anyone know what to do?   I replaced the ECC83 tubes one by one (testing it between each tube replacement), but it didn't fix the problem.

Here's a video of my problem.

https://youtu.be/lN_lhUAu7jA

 

asked 19 Dec 2019 at 11:10 PM

Brandon Isaak
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I was just playing my Epi on the Acoustic setting and all sound went out and the screen and buttons started flashing. Tried pluggin/unplugging. Pluggin into a different outlet. What the hell just happened?

https://www.youtube.com/watch?v=_l54NTu-p0s

asked 24 Jul 2018 at 06:18 AM

Ivo Tasev
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