I have to admit, I really like this over the top for my needs PSU, but so cheap for what it is!.
I am definitely going to fit Option 020 which I can easily make on a single sided PCB looking at the circuit diagram. But why all the chokes and capacitors instead of just straight cables like Dave did with his
HP6643A System Supply? It also looks like instead of jumpering some tracks like in Daves video, the 0 ohm R456-R459 links have to be removed from the A1 board for the front panel binding post option?
Also L601 to L604 values are not specified in the documentation. Any ideas?
![](http://i.imgur.com/XNGbRnY.png)
I'm definitely on the lookout for more of these PSUs, at a good price, but with the higher voltage/current instead
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif.pagespeed.ce._JElyJQqdB.gif)
The size and the noise doesn't bother me.
Oh, and if anyone knows how to rejuvenate the VFD display let me know. It's clear this PSU has spent its poor life stuck in a rack in the old Nokia factory in Germany 24/7 on the same voltage settings for at least 10 years.
![Broken! :-BROKE](https://www.eevblog.com/forum/Smileys/default/smiliey_scope_broke.gif.pagespeed.ce.z9RuKVWKjY.gif)
Mind you, I can always claim the dodgy VFD brightness changes are a kind of electronic "patina" - and proves my ancient antique is genuine. If I remove the patina, Pawn Stars would only give me $10 as it would sit on the shelf for months, etc.
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif.pagespeed.ce._hfWAz_QHO.gif)
ETA: The circuit diagram for the binding post option on the A1 Board.