Einstein Head makes a strange noise - solved

[Serviani]

Since yesterday whenever i switch to channel 2 is making a strange noise in the backround!
The amp is brand new and i own it for only 10 days now.

I've uploaded a small audio sample so you could hear what i'm talking about.
http://www.box.net/shared/8gz1u699yh

Peter what do you this is?,please guide me through what must be done.

 

[duesentrieb]

Could be a broken preamp tube.

 

[xmartx]

Could be a broken preamp tube.

Sounds like it. I had a really similar sound coming from my Framus Cobra a couple weeks ago and it turned out to be the preamp tube for the fx loop.

 

[Serviani]

Thank you for your input guys,my guess was a preamp tube as well,which one i have no idea.
Peter please let me know as soon as you see this topic.

 

[MARK2C]

Einstein:

V1 Used by both channels
V2 Used by channel 2
V3 Used by both channels
V4 Mixer & Loop Driver
V5 Return Driver
V6 Phase Inverter
V7 (just combo) Reverb (12AT7)

My best guess is V2.

 

[flownomis]

replace v2.

i ve had the exactly same issue.

dont blame diezel on this (i know you havent ). preamp tubes can be a pain in the ass.

i wish you a live full of joy with your einstein, you are gonna have it

 

[Serviani]

So yep it was V2 causing that noise,replaced it and now i have a big smile again!

Just for the record the tube i replaced was a TAD 7025/E83CC HG,and just checked the power tubes are 6550C.

Thank you all for your replies!