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The Pioneer Super Linear Circuit
The Pioneer Super Linear Circuit
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Old 9th November 2017, 03:10 PM   #61
dabore84 is offline dabore84  Netherlands
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The Pioneer Super Linear Circuit
Because of time constraints I will for the time being observe from the sideline...

"No FETs, no NOS parts, no 0.3% matching" very nice!

Nice review Stixx
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Old 9th November 2017, 06:33 PM   #62
EUVL is offline EUVL  Europe
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The GB is closed already.


Thank you all for your interest,
Patrick
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Old 1st December 2017, 06:38 PM   #63
mlackey is offline mlackey  United States
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Default BOM for Simple Discrete Regulator

Hello Patrick,


I downloaded the documentation package late yesterday, and it is complete, but with exception of BOM for the regulator. The text has footnotes to similar circuits, so I would have looked there to see values used, but the footnotes are not present either. I searched the forum for "simple discrete regulator" and only came up with 2 hits, neither of which apply.


I would prefer to buy values known to give 15V. I have very little "stock" of SMD parts, very few choices. If the regulator is from a previous group buy, I can look there. Maybe it's in this thread, but I quickly scanned the pages and did not find it. I know I'm missing something, but what?


Best regards,
Mike
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Old 2nd December 2017, 12:42 AM   #64
EUVL is offline EUVL  Europe
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My mistake, though 2 more people who checked also missed that.

Give me two days and I'll let you know when it is updated.
You can then download the revised version with the same link.


Sorry for that,
Patrick
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Old 2nd December 2017, 01:17 AM   #65
EUVL is offline EUVL  Europe
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Revised version can be reloaded under the same link.


Patrick
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Old 2nd December 2017, 03:55 AM   #66
mlackey is offline mlackey  United States
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Now THAT was FAST!

Thanks, got it.

Best regards,
Mike
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Old 2nd December 2017, 04:19 AM   #67
EUVL is offline EUVL  Europe
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Just a copy and paste error.
The BoM already existed.


Patrick
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Old 3rd December 2017, 05:00 PM   #68
Morde is offline Morde  Finland
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I have a question about matching the CCS board BJTs. I have the following pairs:

Left channel: Q41=611, Q42=612, Q43=610, Q44=610 (Hfe value after the = sign)

And the problematic Right channel: Q41=612, Q42=624, Q43=611, Q44=624

The problem is obviously with the bolded values since I have no more matches. Is it ok to match pairs like I proposed or should it be done differently? Otherwise I found quite good matches, but I seem to have run out of luck with the CCS devices.
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Old 4th December 2017, 05:24 AM   #69
EUVL is offline EUVL  Europe
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For the CCS only N to N and P to P are important.
N & P can be different.


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Old 4th December 2017, 06:12 AM   #70
EUVL is offline EUVL  Europe
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I should have said N & P match less important.
They still want to be reasonable close, say 5% hfe.


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