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Wayne's BA 2018 linestage
Wayne's BA 2018 linestage
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Old 30th October 2018, 12:55 AM   #11
mpmarino is offline mpmarino  United States
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Squished down

wow - too far down!
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File Type: pdf BA2018-R1_Wayne_1.pdf (859.7 KB, 183 views)
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Last edited by mpmarino; 30th October 2018 at 01:05 AM.
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Old 30th October 2018, 01:11 AM   #12
tsmith1315 is online now tsmith1315  United States
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No problems downloading the .ppt with Firefox here. It's good to see some interest.
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Old 30th October 2018, 01:41 AM   #13
mpmarino is offline mpmarino  United States
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Quote:
Originally Posted by mlloyd1 View Post
wayne's line stage is just BEGGING for the 6 transistors, LED and passives to make it differential in and out ...



mlloyd1
?? Did I miss something, or is this what you've drawn in your head?
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Old 30th October 2018, 09:39 AM   #14
EUVL is offline EUVL  Europe
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N-P complementary all the way except for the input stage.
What a pity !




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Old 31st October 2018, 03:05 AM   #15
kasey197 is offline kasey197
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Wayne's BA 2018 linestage
Quote:
Originally Posted by EUVL View Post
N-P complementary all the way except for the input stage.
What a pity !




Patrick
I'm happy for Wayne to correct but I think that is precisely the point of this exposition- a design exercise without P-Jfets at the input stage..
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Old 31st October 2018, 06:12 AM   #16
EUVL is offline EUVL  Europe
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Then why not fully single ended like a Borbely EB602 ?
A complementary circuit with only a single ended front end looks like a compromise to me.


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Old 1st November 2018, 12:52 PM   #17
mpmarino is offline mpmarino  United States
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Patrick,

What part is the compromise? The single ended part, the complimentary part, or the fact that both topologies are incorporated?
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Old 1st November 2018, 01:35 PM   #18
EUVL is offline EUVL  Europe
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Complementary input allows push-pull, reduces current swing on each half, and cancels even harmonics.
As is, the bottom half is essentially all constant current, with the exception of the last stage.


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Old 1st November 2018, 01:59 PM   #19
ggetzoff is offline ggetzoff  United States
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Wayne's BA 2018 linestage
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Originally Posted by Zen Mod View Post
Click the image to open in full size.
Choky is a Swiss-Army knife.....of sorts
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Old 6th November 2018, 06:36 AM   #20
mercedese63 is offline mercedese63  United States
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Looks like this thread has sort of "petered out" temporarily for whatever reason.

Wayne...I noticed you offered 100+ purple PCBs for your design at BA 2018.
Like many folks here, I can't drop everything and go to the west coast for this BA 2018 event.
So do you plan on offering Gerbers for your board here in this thread or offering PCBs in the DIY Store in the near future for this preamp??

An update as to your intentions would be nice rather than leaving us and the OP hanging.
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