Hi David, It is the EF91 deck so I think it'll be the hidden transistor.
Hi Andy, I'll just have to creep away and hide in a corner. I spent a stupid amount of time trying to fix the linearity but the set probably got fed up with messing in all the wrong places of its anatomy so it then said to itself "I'll stop this idiot with an HKS."
It didn't recon on Alistair coming up with the isolating transformer so as a last ditch it decided to kill the EHT.
When I still had a picture the linearity at its worst was as below.
Peter
