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Old 23rd Aug 2018, 10:02 pm   #1
k_yller
Pentode
 
Join Date: Jan 2014
Location: Huddersfield, West Yorkshire, UK.
Posts: 113
Default HT power supply (in progress)

Some time ago I found that what I need is next HT power supply
more compact that my "beaste boys" (20kg weight each) but more powerfull then few tiny I have.
Project
200-400V at 200mA + grid up to 100V +powerfull 6A 6,3 V all totaly independent (floating)
HT part
Valves (2xPL504+EF80+Str85/10)
standard regulator with reference voltage on Str85/10,

Grid Supply
silicon LR8 chip
Support
Support power supply 5V for HT part meters and cooling fan
Voltage mulitplier for EF80
tiny suport power supply for Grid part meters

Transformer #1
180VA with HT winding + tapped 6,3 V winding + 2 V winding (mutliply for EF80 heater) + 2 extra windings 20V and 30V (one will be used for grid meters)
Transformer#2
toroidal transformer for PL504 heaters

Some basic drawings and chassis
Attached Thumbnails
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