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Old 11th February 2008, 02:49 AM   #491
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Nice layout jens...
Whats the final dimension of our superamp?

regards,
Roland
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Old 13th February 2008, 08:10 PM   #492
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Right,
I would like to know dimensions for all pcbs.

Tnx
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Old 14th February 2008, 08:24 PM   #493
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Default How would you like this?

Hi,

How about this:

1) Common front end for both standard and super amp.
2) Two different output stage boards, one common, and one to be added for the super amp option.

The only problem is that the common type will have to be reconfigured if an "opgrade" to super amp is needed.

I have almost data for this solution ready.

Let me know

\\\Jens
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Old 14th February 2008, 08:40 PM   #494
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Jens,
That sounds good as I don't think people will want to switch between them very often. It will make it easier for you also.
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Old 14th February 2008, 09:59 PM   #495
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Jens, The common frontend will have to be reconfigured or the common output stage?
A really good cascode frontend designed with the cascode output would be nice. Then no changes would have to be implemented to build the 16 device amplifier.

One small note. When Dr. Leach designed this amp he set the feedback at approximately 8mhz. Are the current mjl4281 devices with 30mhz appropriate for this build. They seem to work quite well with the 10 transistor version I just want to head off any potential obstacles.

Have a nice weekend all. Tad
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Old 23rd February 2008, 06:51 PM   #496
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Hi All,

Sorry for the delay.

I have now made the extended version also, and prepared a production panel.

I have a bit of room in the top right corner (8.6 * 6.5 cm), what shall we put here? - I thought about maybe a front end regulator ?? let me know

\\\Jens
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Old 23rd February 2008, 08:51 PM   #497
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Jens, Is there enough room for the regulator and the connections from a separate transformer. We get charged mostly for board area. Any extra use of the space is better and cheaper for the constructor. I say go for it. I like those nice bright yellow boards. Tad
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Old 23rd February 2008, 08:56 PM   #498
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Thumbs up Front end regulator board

A regulator for the front end would be a great addition to this setup!
What is the cost for a complete panel? That might be a good way to offer them to people that are interested in both output stage types.
It might also save them some money.
Thanks,
Donovan
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Old 24th February 2008, 07:36 AM   #499
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Default Schematics so far

Hi I forgot the schematics

\Jens
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File Type: pdf super leach ver 7.2.pdf (69.8 KB, 879 views)
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Old 24th February 2008, 07:54 AM   #500
Loboone is offline Loboone  New Zealand
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Fron end regulator sounds great to me Jens. Can you get one per channel with space left? Mite be a bit of a squeeze!

Ian
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