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Old 10th November 2007, 09:21 PM   #131
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Quote:
Originally posted by B.L.
output sections enough?
Not enough for 100 watts, imso.
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Old 10th November 2007, 10:10 PM   #132
steenoe is offline steenoe  Denmark
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Quote:
Originally posted by HBarske
Cleaned up a bit, we're slowly getting towards something useful:

Click the image to open in full size.

Bottom layer pdf: http://www.hb001.de/aj_pcb3.pdf
Really nice work, Mr Barske

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Old 10th November 2007, 10:16 PM   #133
steenoe is offline steenoe  Denmark
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Quote:
Originally posted by GRollins
I must say that I'm not a big fan of running semiconductors at their rated limits, much less over.

Grey
Me too!! Not mentioning; recommending it to the average DIY'er

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Old 10th November 2007, 10:22 PM   #134
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Thank you very much, Steen. Here's the latest version:

Click the image to open in full size.

Doubled the power resistors, so 1R/2W types can be used (much easier and cheaper to get over here), added two decoupling capacitors, increased the space between the output transistors, and did some other minor modifications. Pcb is now 100 * 100mm. If anyone's interested - here's the bottom layer pdf: http://www.hb001.de/aleph_j5.pdf
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Old 10th November 2007, 10:33 PM   #135
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Starting to look like a tolle biene, Holger.
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Old 11th November 2007, 12:58 AM   #136
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Quote:
ask Papa why he isn't cascoded little critters
I am curious about that too.

I had my blue aleph mini boards cascodeded briefly, and listening in mono I noticed the detail was amazing. But it went POOF the next time I turned it on, and the jumper wiring I did to cascode it was too much of a PITA to swap out the jfets, so I didn't keep the cascode.

But I am working on a cascoded aleph board -- with the intention of becoming a respectable citizen by doing away with the blue boards in my mini-a.

JJ
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Old 11th November 2007, 03:01 AM   #137
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...unless the blue boards are the product of Peter Daniel...
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Old 11th November 2007, 06:10 AM   #138
EUVL is offline EUVL  Europe
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> Not mentioning; recommending it to the average DIY'er

Right on.

And I was trying to point out that even the device would survive the breakdown voltage, it would have so much leakage that it would no longer behave as it should.

Not that everyone cares to know ......


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Old 11th November 2007, 12:28 PM   #139
Ryssen is offline Ryssen  Sweden
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Quote:
Not that everyone cares to know ......
I do!
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Old 11th November 2007, 07:49 PM   #140
MRupp is offline MRupp  Germany
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Default Here's the latest version:

Quote:
Here's the latest version:
I know this is really nitpicking but for R5 / R6 you could use 2 resistors in parallel instead of series connected ?
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