GrahamG

tesseract Brilliant. I think you are the first person that I have seen on this forum who has actually built the unit and made the associated comments about various parts that need to be changed or put off the PCB. Did you suffer from this 0V adjust problem with the original cct or is it just the newer version that does this ? Nice to see also that someone has published the EAGLE CAD files. A great help.

redwire - thanks fo ryour feedback. I prefer not to auto-route on Eagle as I dont like the way it places tracks. A double sided is fine for me as I just use jumpers for the top layer, adjusting the via diameter for current. Noted on your heatsinks and wire sizes, and diode and ECB orientation. I am an electronic engineer and know about this. Overlooked very easily! I have not checked the circuit out but I hear what you say about RV1. What was it "supposed" to adjust ?

Holt - many thanks for your response. Points are noted. Keep me posted on your developments. As I said I have not even got around to routing the PCB but I have managed to do the schematic in Eagle 5.0. At least that is a start.:)

redwire - thanks for the tip. I saw the additional options but didn't open it. I was looking in the icons above the message box. You presumably have built this PSU. When I eventually get around to routing the PCB and buying the TXs are there any points to look out for ? I noted in the list of components that some of the specifications are short - i.e. diode bridge should be rated at the full load current and the output driver transistor will probably have to be mounted on a heatsink as the base current to the output TR's will be high (hfe low on these output TR's).

I can' help you here as there seems to be no facility. Perhaps as we are all novice users you cannot do this.

Exactly.That is how i do it all the time for making prototypes. You just have to remember to keep the top layer "jumpers" straight else you will be soldering in some weird looking wires. If you have to go around a corner then use top-straight, bottom-angled and the top-straight again. Also remember to make the vias for the top layer with at least a 0.8mm hole size and 1.6mm diameter else you will destroy the via when you drill it..... normal UTP core is what I use. Only need heavy duty wire for high current tracks. I have down loaded the latest, the one with all the RED text. I havn't got much further other than to redo the schematic in Eagle, busy now with routing tracks from the netlist

shoaibasghar - i am busy making the PSU myself. My suggestion, if you have not got the facility to make DSPCB, is to route the board in Eagle on the copper side only and to use top layer tracks as "jumpers". This works well. They must be straight however.

audioguru - thanks for the reply. must be a mistake in the forum as i read every page on the lab psu and one article mentioned D15. Perhaps a different project.

I have just started with this project and am reading up on all the alternations/changes that have been made but I can't find "D15". Am I missing something in the schematics ?