As several people have already stated, make sure you jump the ground terminals - I have first hand experience with forgetting this little step, and I'll just say that the results can be quite shocking!
Yea I jumped the terminals Btw the PCB I have on my valab pot the R and L channels are wrong. R=L and L=R. Somebody made a mistake building the pot or just the plate is wrong. But that is not a big deal and the crack sounds wonderful Received my CBS 5814A tube too. Happy days