check out his web site he has done them.
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i own the Heathkit 151 completely rebuilt in triode by Sam Kim, asnd it just sings and rocks! Best amp I've ever owned (including Don Garber's terrific SET Fi 2a3 monolocks). It is a little pricey, but they're willin to dicker o the price a little bit. If you love EL84, THIS is the amp to get... forget manley stingray,etc.
Let me know if you have any other questions...