Hi, don't know if this is the right place but here is what I found on the net:
Russian Bipolar Transistors - Datasheet: http://evita.lt/other/p200_kt500.pdf
May be useful to some people!
Enjoy!
my favorite amplifier: Ampeg M-15 Dynacord Preference 500
Completed builds: Fuzz Face (2) Tonebender MKII (3) ROG Tri-Vibe PAiA Ring Mod kit Ring Mod based on Tim E schematic (2) Rangemaster CNO ROG Splitter-Blender Clari (Not) cubed deluxe
edit - seems Depleted linked to the same site just a couple posts above
... multiple LFO waveforms (saw up, saw down, triangle, square); a more flexible envelope with attack/release controls as well as inverted envelope. I am afraid it will have more knobs than the TGP annual convention - frequencycentral