I was looking at the book I posted and what was done to my set is not the same as what is described in the book. I would go by what's in the book if I were you, not my set. I'm going to look into what was done to mine and see if I can make sense of it. The book says to move the red cathode wire to the position of blue and green, mine has the blue and green moved to the red. Arrrgh.... I'd better look at the other stuff too, it does say that with a sulfide tube, it is not necessary to do the pink highlight mod. Any CTC 9 gurus out there wanna chime in? 
As for those diodes, I think they are pretty vanilla. 1N4007 comes to mind.
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Kyocera R-661, Yamaha RX-V2200
National Panasonic SA-5800
Sansui 1000a, 1000, SAX-200, 5050, 9090DB, 881, SR-636, SC-3000, AT-20
Pioneer SX-939, ER-420, SM-B201
Motorola SK77W-2Z tube console
McIntosh MC2205, C26
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