PLANAR TRIDE GRID PULSE - CHANGES FROM REV:A TO REV:B  June '05  Alan Stummer
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* Change Blaster connector (right pin numbers, wrong footprint).
* add bulk caps C41-42 (+3.3V and +1.5V supplies).
* add heatsink to IC9 (+3.3V reg).
* fix IC5 XO pinout (gnd and out reversed and it still managed to oscillate!).
* add R42 & C43 (grid pulse limiter).
* move R12 & add C46 (RC delay for HV enable).
* reduce C9 from 0.1uF to 0.01uF (HV controller integration cap, reduces overshoot when enabled).
* add C45 & R43 (filters for HV pot).
* increase R16 (HV blinking LEDs resistor).