O/P valves for WAD KaT88

[Greg.]

It's been a few years since I did anything with the KaT88 I originally built and then passed on to my son who has been happily using it daily whilst I have moved onwards and upwards (some might say backwards and downwards ) with other things. It is a fully tweaked version as per Richard's original upgrade spec although I stopped doing things to it when Sowter O/P Tx's were introduced and I think some even removed their grid stoppers. A recent email from Black Stewart has got me thinking. Although I passed it to my son with a set of the original JJ KT88's and also a set of Svetlana 6550C's, these valves must be tired now and a new set would be in order. The question is, what to use? I believe there are now some nice Tung Sol's available but would welcome suggestions from you guys on what you think is the best (nicely different) KT88 and/or 6550 valves to go for. Thanks.

Best wishes,

Greg