He should have something soon. Apparently a balanced autoformer design is a bit trickier than with a transformer. I was expecting to prefer the EL34 as well. Does the Avatar also run KT88s, or just EL34s?
The Avatar and Avatar SE run EL-34 tubes only. I believe the Avatar Super runs KT-88s.
Autoformers are a bit more work to get into balanced mode. John is a bit of a perfectionest so I anticipate a good 6 months or so before something becomes available. Until then I'm sure my Jeff Rowland Capri with phono will do just fine.
Pubul: I suspect that Roger gave you a set of matched tubes. In my experience, tube matching makes a huge positive difference in the sound. It sounds like you have ordered another set of KT-88s from another supplier. Will these be matched as well?
Roger's tubes are amazingly well matched in circuit. It really makes me question some of the folks out there selling "matched" pairs and quads. I won't name names but you do wonder if some of these tubes really are matched. Roger's are for sure. I ordered the Genalex from Jim McShane who seems to have a good reputation for taking care in matching tubes. They arrived last night, and I will run them tonight and check their bias in operation.
I installed the KT88s (Genalex from Jim McShane) and they bias perfectly (all within 5%) which is very encouraging. He seems to be really matching the sets. The Genelex sound great, but I'm going have to A/B for a while to see if I prefer them to Roger's - it may not matter one bit as the amp sound great with both. I think one can feel comfortable buying from either Roger or Jim - and of course Andy at Vintage Tube Services for NOS.
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