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Old 30th November 2009, 01:52 PM   #21
FAA is offline FAA
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i'm in for 2pcb's
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Old 30th November 2009, 05:48 PM   #22
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To all,
I originally started this thread to gauge interest in another group buy of the Leach/Jens 10 transistor amp, of which several hundred were ordered, however, it seems that Jens has a new layout similar to the original with the output section in the middle and a few other refinements.
One member suggested a 12 output section pcb with a snap off if you wish to use less output devices.

If Jens is able to provide us with this latest creation then the group buy will proceed with the newest version. Just wish to clear this up. In any case these are superbly designed pcb's with proven, in actual use, features. I will order the boards with the heavy fiberglass and 2 oz. copper tractk. They will be green with white solder mask as in the past.

I believe that PA is going to open up a wiki for this project --PA?? Then we can see how it progresses. The best prices start to develop when we reach 100+ boards. Once the final design is in I will get a quote and post here.

Tad
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Old 30th November 2009, 06:06 PM   #23
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hi

Pictures of the pcb and other pertinent information can be found under the Jens Rasmussen leach clone thread.

Do you have the link to this thread ?

Thanks
Serge
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Old 30th November 2009, 07:12 PM   #24
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Configuration?

Should the main board be with 2 x 3 output transistors, with an extra 2 x 3 placed on a break off section?

Or ??

\\\Jens
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Old 30th November 2009, 08:32 PM   #25
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Jens,
I will personally leave the pcb design up to you. I like the 12 output idea and the breadoff section. With 2 extra outputs the overall dimensions only change about 22 centimeters. In breakoff I guess you mean something you will have to take some care to cut or can the traces snap with the fiberglass? I plan to leave mine with all 12.
It seems quite a bit of interest has found it's way to this group buy at such an early stage.

PA. Thanks for the Wiki.

Tad
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Old 30th November 2009, 09:04 PM   #26
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Default Schematics

Hi,

I updated the schematics... now with 12 output transistors!

What size cap should C21 +C27 be? diameter + pin spacing??

\\\Jens
Attached Files
File Type: pdf Leach ver 1.00.12.pdf (47.4 KB, 521 views)
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Old 30th November 2009, 09:45 PM   #27
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Hi,

Board is ready C21 + C27 still need to be desided on.

night night

\\\Jens
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Old 30th November 2009, 10:43 PM   #28
Loboone is offline Loboone  New Zealand
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c21 and c27 10,000uF 100 volts??? (only because I have just replaced out of leach 6 and have spares)

As an asside small matter would we be able to get all chassis / heat sink wholes issolated this time please. I found it quite a hassle to deal with last time! So only ground earthing would be done through speaker terminal to star earth and isolated out post???

Just some thoughts. I will leave it up to you experts.

Ian
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Old 30th November 2009, 10:55 PM   #29
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I'd be good for 4 boards
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Old 1st December 2009, 08:49 AM   #30
Luke is offline Luke  New Zealand
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I would like 2 please.
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