I am interestested in several boards. I will know how many when we have a final design. Ed's idea of separating the front end from the output stage is a very good one and gives much greater flexibility in choosing heat sinking and output devices.
Hi,
You might be able to improve on some minor things, but it will be more expensive... I will be happy to make a 4, 6, 8 layer version... but the cost will go up a lot.
\\\Jens
I question the value of a multi layer board. A double sided board is repairable. A multi layer board is not. What value does this offer us? It seems to offer little or none. It will be less reliable and cost more.
I realized in my work for industry a few years ago some 4 layers pcb and i know that it's more expensive .🙂
There were one layer for the GND,one layer for the +v and -v ......
But the question was ,is it possible to improve the performance with a 4 layers pcb.?
Serge
There were one layer for the GND,one layer for the +v and -v ......
But the question was ,is it possible to improve the performance with a 4 layers pcb.?
Serge
Are you going to do this again?
The Wiki says this order is closed and gone. Are you going to do It again?
The Wiki says this order is closed and gone. Are you going to do It again?
Interested in just 1 if it's the same as the last GB. 2 if it's for the new 6 pair board.
--Greg
--Greg
yup, this is a 6pair version with option to cut the board for 3 pairs output if that is desired by end user...
Why not a real universal one ! regular or double barreled on same board ? with choice of 8x to5 4x to220 and for sure 12 out. possible and forget your 2x 10,000Uf
There was some plans for this a while back. I know Jens had drawn up the boards, and I think Tad had some protos made, and somebody did some testing and then ???. It seemed to evaporate. If we could resurrect those plans, I think it would be great...
No reason to have half-a-billion different minor revisions of this design floating around. A universal front-end with 3 or 6 output pair (plus double-barrelled) would be a fantastic option.
--Greg
No reason to have half-a-billion different minor revisions of this design floating around. A universal front-end with 3 or 6 output pair (plus double-barrelled) would be a fantastic option.
--Greg
the front ends are not the same, although if you have the super leach amp front end you can easily set it up for a lo-tim version.......
this is the thread....http://www.diyaudio.com/forums/solid-state/51392-leach-super-amp-pcb-re-design-lsaprd-12.html
Sorry, I've made a mistake, i was thinking that it was the Super Leach PCB amp. Please do not consider my offer !
Thanks
Thanks
Yes Tony ! Double barrelled front end and only few cut/jumper(copper trace) and voilà you get an universal Leach: 6 to 12 output and +/-50vdc up to +/-95 .
I remember building one few months after publication (Audio May 80). Have been replaced only 15years later.Would like to built a modern version.
there is another thread on that......maybe jens can be persuaded to do a universal version....
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