Roadster head volume problem

[bnzboy]

Hello
I purchased a mesa boogie roadster head 3 weeks ago
whenever i start playing for 5~10 minutes, the volume just dies
when I switch to other channels and then come back, it's becomes normal
but the volume dies again several times
is it a power tube problem?
should i send it to a mesa boogie technician and get it fixed?

 

[JimAnsell]

mine did that.
i took it back.
it was only on the red channel when the fx loop was engaged.
so maybe try changing the fx loop tube, or cleaning the jacks.

first see if it does it when the loop is off.

 

[bnzboy]

i see
mine does that on the orange channel
i will try to turn the loop off tomorrow
thanks!