Volume problem when switching channel

[chamo]

Hello to all,

I own a Mark V head for 2 or 3 months, and I recently notice a problem during channel switching.

ie, I play clean channel, I switch to channel 3 and I have no volume, the volume is increasing slowly during 5 seconds as a fade in, then volume is ok. The problem is the same for switching from channel 2 to 3, or 3 to 1, 3 to 2, 1 to 2, ...
I have this problem after 2 hours of playing. I put standby and I wait half an hour and I don't have any problem during channels switching.

Do you have feedback about this problem,

Thanks a lot

Ben

 

[Chester]

Sounds like something more than a tube issue. If you purchased the amp new, it is still under warranty, so talk to your dealer who may be able to help

Good luck

 

[chamo]

for you, it should be a problem with power tubes.

How can i check this?

If I go to the amp shop and we try different couple of tubes, i can't reveal the problem because it appear after few hours of playing, is it ok? or I change 4 power tubes and I will check during the next rehearsal?

Thank you

 

[chamo]

I gave my amp to the music store where I bought it, and they will check amp and if they don't find the failure, they will send amp to the customer service.

I'll keep you inform

 

[jb's 52]

I'm no EE but something "slow bleeding" like that sounds like a capacitor going wacky.
Hopefully it's nothing major and you get yer amp back ASAP!!