Question about swapping tubes

[fuzzgod]

Howdy,

I had some rattling goin' on behind the amp when I'm jamming (esp. with some humbuckers), so I called Mesa and they sent me some new power tubes. The only question I have is, since they come in and work in pairs, which two are paired up in the MkV?? The noisy tube is the one farthest to the right (facing the back of the amp...what is the corresponding tube that is paired up with the rattling position??

Any help is greatly appreciated.

 

[MrMarkIII]

The power tubes are paired A-B-B-A (Just remember the name of your favorite 70's band Nyuk, nyuk!).
The furthest to the right is paired with the furthest to the left.

 

[fuzzgod]

Thanks, man. Off to rocking...