[0-30 Vdc Stabilized Power Supply]

Dear Moderator:

All what i learned buy this 60 page, is that the greek designer (if he really is the designer) exposed a common wanted project which than fall in the hands of Mr. AUDIOGURO, aparently now the owner of the project. I live in in poor country, we are 40 years in war with guerillas and as hobby i can only use scrap, what i can get hold of. So special parts are out of my reach, large condensator-banks i have to assamble by mF 4800's, whe i get most out of the cheapest....
Now, i have a scrap Transformer out of the old days, 2x12V + 6,3 V, 110VA. I would like to use it, making the 6.3V Winding the negativ feed of a 7905 regulatar, end eventually using a diode in the feed to boost to -5,6V.  As i have a 35 amp bolt-on square rectifier chaep at hand, a two stage switch would be helpful to reduce execessive power to be burned of buy the 2N3055´s.

I divided this project into 3 stages:
1.) rectification
2.) cheap overide stage
3.) output stage

may i send You my drawing? Audioguro is some numbers to large for me, and i don't wat to be subjet of laughter.

best regards,
manfred,
HANSASHIP

That is not going to happen.
Also, mixos reports that this project worked fine for him in it's original form. He just could not achieve the 3 Amp output. No other problems. Notice that he posted a new topic in a different thread for modifications to get more current. (He did not give up on this supply because it would not work)

audioguru should note that I also get emails and PMs from users. Many who ask why so much change to a project which works ok for them or why is there a post that says a project will not work that they have built and are using. That is the problem with too much theory and not enough work bench.

I recommend to anyone who wants to build this project that they can go ahead and build it in the original form. Then if they need to make changes for their purpose, make them from bench testing. Not from theory.

I do not anticipate that there will be modifications posted to the projects section since the owner of this site has built this circuit and has reported that it works well with the one exception. In my opinion, if you need a constant 3A output, build a different power supply. Besides, there are way too many power supply schematics on the web to spend so much time on this one.

MP

[0-30 Vdc Stabilized Power Supply]

Hehe thanks buddy for the compliments :D and sorry for the 50w resistor :p because I don't have one.

Here is another picture of it so even the people who are going to build it will have an idea of the layout :) (sorry for the dirt on the table but I was just drilling a PCB lol)

Thi looks realy well built and profesional, so pls excuse my stupid question: WHAT IS THE GREEN CENTER- POST FOR? Do You get any negative Voltage out of Your PSU?

[0-30 Vdc Stabilized Power Supply]

Xenobius,

First I have to say; It look very nice and tidy built, good job!
You can�t test it without some form of load. If you happen to have a 15Ohm 50W+ resistor this will put 2A on 30V. It�s possible to use bulbs but its not easy to find 30V bulbs.
Or maybe your next project could be a �dummy load�?

Ante ::) Since month i follow up this forum, but it's easy to find 32V light bulbs in US Fishermen's supplies, since they( Fishing Boats) use a 4x8V=32V battery system. Even 100Wx32V Bulbs can be easily purchased thru US suppliers.

rgfs,
manfred - hansaship