mark v cutting out?

[goneloco]

hello my mark v combo volume is cutting out to barely audible levels. It is doing it on all channels after a few minutes.
It will do it ,despite me only playing at bedroom levels.

power tubes or pre amp tubes?
any help would be appreciated.

 

[search4tone]

Might try the foot switch cable. Sometimes my foot switch cable looks fine but is off by just a bit. I go to Standby and move the plug until it seems solid again. Might not be your problem but an easy check.

 

[goneloco]

hello,Thank you for your reply.
unfortuantely it does with the foot switch unplugged from the amp.

 

[goneloco]

i have norrowed it down to 10 watt setting only.
it plays fine in 45 watt and 90 watt,but cuts out in 10 watt in every channel.
any suggestions?
i already changed out the v1 v7 and the v3

 

[rocknroll9225]

My first thought was V1, but I guess you already tried that. If it only happens in 10W, then it could possibly be the rectifier tube. Does it cut out in channels 1 and 2 in 45W with the tube rectifier selected?

 

[goneloco]

i continued to swap out the tubes. it was one of the 6l6's