View Single Post
Old 26th Aug 2018, 12:37 am   #2
k_yller
Pentode
 
Join Date: Jan 2014
Location: Huddersfield, West Yorkshire, UK.
Posts: 128
Default Re: HT power supply (in progress)

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.
Attached Thumbnails
Click image for larger version

Name:	pcb4.jpg
Views:	153
Size:	41.6 KB
ID:	168090   Click image for larger version

Name:	pcb5.jpg
Views:	139
Size:	38.4 KB
ID:	168091   Click image for larger version

Name:	pcb2.jpg
Views:	151
Size:	39.2 KB
ID:	168092   Click image for larger version

Name:	pcb6.jpg
Views:	156
Size:	75.5 KB
ID:	168093   Click image for larger version

Name:	pcb8.jpg
Views:	190
Size:	75.3 KB
ID:	168094  

k_yller is offline