Ok,
So here it is, the updated power supply for the G9 using a 42V winding in place of the 15V if you are going to use a single custom wound trafo.
Note when compared to the original schematic parts D8 - D12, C26 - C29 are omitted and C20-22 need to have their voltage rating upped to 100V as 42V full wave rectified is doing to push you over the 63V tolerance.
You can cleanly do this with a bridge rectifier. I used a W02, but an 01 would have worked as well and then moved the legs around and lined it up on the PCB to make a neat fix. I added heatshrink on the - leg which goes to ground just incase it shorted with one of the AC junctions.
The results look like this:
Not in order to do this I needed to cut a trace under the board because one of the AC connections was also on the ground trace, I did like this:
Just for the record these are the specs of the torrid I had wound:
Prim1 : 230v
Sec 1: 220v @ 75mA
Sec 2: 15v @ 1.5A
Sec 3: 42v @ 50mA
Come to 42VA, but I just had them make up a 50VA.
While on useful info and since I had my camera handy, here is another tidbit:
DI/INSTRUMENT MOD:
This has been brought up in the past but a couple builders have experienced problems with oscillation at the highest gain settings and forum user AXEL offered a solution to the problem that seems to cure it here:
http://www.groupdiy.com/index.php?topic=114787
Jakob has a detailed drawing of this on his site here:
http://www.gyraf.dk/gy_pd/g9/G9-EDIT.GIF
But I thought it might be nice to shoot a of the mod done so you can see it on the actual PCB.
You can see where the traces have been cut, I used a small cutting wheel with my Dremel drill and it did the job just fine.
Riggler,
RE your caps, they should be fine. If you look a few pages back you will see that I have shown the Rubycon brand version of your Nichicon. Jakob confirmed they will be fine and I think Godders used the same ones in his circuit... caps have come done in size over the years as have many other components.
Cheers
Matt
