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Tube match problems

Hi Everybody

I’m new here and would like to ask for your help. 

I got VTL power amp with 6l6 tubes. They were perfectly match. Unfortunatelly when I was recently moving, took out tubes and forgot to mark tubes against sockets. Now I’ve connected back whole my set up, most luckily tubes in wrong sockets, it doesn’t play as it was. I don’t have tools to check bias and it really difficult to find any place dealing with tube amps in my city. Any ideas to solve this issue, which makes me crazy :(((
mn
mn OP
13 posts
 
Thanks for reply, oddiofyl. 
I have already red this article in VTL’s site - good one. 

Could you check the link that I posted above, photo of the amp similar to mine and could you advise the test point. To be honestly, I’m struggling to recognize it. 
oddiofyl's avatar
oddiofyl
4,203 posts
 
Post a clear pic directly from above please
oddiofyl's avatar
oddiofyl
4,203 posts
 
The Stereo 50 I had sounded great,  VTL's response to second hand owners of their legacy products..... not so great.
mn OP
13 posts
 

I’ve just discovered that I cannot attach a photo...
oddiofyl's avatar
oddiofyl
4,203 posts
 
There should be holes, two for each tube.   One is and insulated test point.  If you look inside the other hole , you will see a potentiometer pot... i think it was blue with a white adj. slot.
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