Metropoulos Forum

Was hopeing someone might give the ok or a suggesion on what might be going on. I have just finished my JTM45 and had a few issues in start up. I kept blowing a main when I started to drive the amp hard. I do believe everything is straight now after arcing a few tubes out I realized the strange hook up Heyboer provided me on how to hook a rotary impedence swith up with their RS clone OT (fixed at 8 ohms now) and the use of a UA Attenuator just created a high Flyback volatge and I was getting a internal arc over in a Power Tube. I have the Amp up and running now and it sounds really nice with B+ @ 450 and my plate currents at 34ma apiece at Idle on KT66's. What is strange that is worrying me a litlle is I will patch High 2 to the Low 1 input and play out of High 1. Normal volume at 8 and High Treble at 4 real nice sounding drive but after I played 3 or 4 minutes I checked my plate currents again finding that V4 is at 34ma but V5 is at 25ma and will get lower if I play more. If I let it sit for a few minutes V5 comes right back to 34ma again? I tried swapping tubes and found this is exclusive to the V5 socket. Is this a normal? Does V5 tend to unload abit after it gets played and will come back after you let it rest a minute or 2 or do I have someting breaking down somewhere? The amp is just as quiet as can be and except for that V5 issue...The amp is a real tone monster. Sure would like to put my mind to rest on this and box her up, any help would be greatly appreciated
Regards,
Black3

Bump it up.

Did you ever figure this out?