Design based on dimension taken from components from drawer and drawings from internet , but when i get main component (transformer) I found that connectors looks much different then on catalog drawings
and require much more space.
Anyway finally I can design PCB
PCB contain
voltage multiplier for EF80 heater , support 5V PSU for HT meters & cooling fan (LM317), Grid PSU.
LR8 in SMD version because of power dissipation capability, in standard application with 200K log potentiometer. 200K cover range to 100+ volts , logarytmic gives higher precison in low voltage range. Of course the best will be multiturn but I have to buy it.