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The Pioneer Super Linear Circuit
The Pioneer Super Linear Circuit
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Old 10th October 2017, 02:07 PM   #21
cwtim01 is offline cwtim01  Hong Kong
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I have been listening to the diamond buffer version of the amp in the past 2 days, and it sounds very nice - a neutral, natural kind of sound , that keeps me listening for long hours.

I use TO92 devices as I have them in my parts bin, but soldering SMD is easier than many would expect - it actually took me less time to solder the SMD power supplies in the picture than the amp boards, the trick is to have a good magnifying glass.
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Old 10th October 2017, 02:26 PM   #22
EUVL is offline EUVL  Europe
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And you call this a quick & dirty build !!!

For those who don't recognise, the power supplies (one per channel) are Jan Didden's Silent Switcher.
Just enough power for this purpose.


Patrick
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Old 12th October 2017, 02:47 AM   #23
EUVL is offline EUVL  Europe
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I received a PM today from a respected member about adding a JFET follower at the front.

This has actually been implemented already.
If you look at the pictures in post #1 carefully, you will see J1 & J2 along the left hand edge on the top side.
These are a pair of matched 2SK209 used as source follower.
Also mentioned in the article, but left out in the schematics.

The PCB is designed such that you can either include them or leave them out and connect the input to the SL circuit directly.

But many thanks for hint, T.


Patrick
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Old 12th October 2017, 12:30 PM   #24
adydula is offline adydula  United States
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Patrick,

Will there be a connectivity or wiring diagram showing how to connect the boards, power source, protection board to each other and the inputs and output jacks, volume control etc?

I assume the BOM will be included to order parts. My part bin is "0"
unfortunately so having an accuurate list is greatly appreciated etc.

Having part numbers for Mouser, Digikey etc is also really nice if at all possible.

Thanks
Alex
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Old 12th October 2017, 03:17 PM   #25
EUVL is offline EUVL  Europe
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Please refer GB related questions to the GB thread.
I'll answer this one there.


Thank you for your cooperation.
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Old 15th October 2017, 09:19 AM   #26
peranders is offline peranders  Sweden
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The Pioneer Super Linear Circuit
Quote:
Originally Posted by EUVL View Post
Here the links to the references :

5. http://www.cieri.net/Documenti/Schem...uperLinear.pdf

Patrick
Any idea what the marked parts do? Some limiter?
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Old 15th October 2017, 09:35 AM   #27
EUVL is offline EUVL  Europe
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Reverse protection ?


Patrick
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Old 15th October 2017, 09:39 AM   #28
EUVL is offline EUVL  Europe
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More or less finished the test platform.
An outdated version of the F5-HA board was sacrificed as a "Mother Board" for power supply wiring.

Will probably be ready for independent audition end of next week.


Patrick

.
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File Type: jpg 171015 HPA Test Platform 1.JPG (119.2 KB, 678 views)
File Type: jpg 171015 HPA Test Platform 2.JPG (328.2 KB, 676 views)
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Old 15th October 2017, 09:49 AM   #29
peranders is offline peranders  Sweden
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The Pioneer Super Linear Circuit
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Reverse protection ?


Patrick
Yes, of course! Why didn't I see that?
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Old 15th October 2017, 09:51 AM   #30
EUVL is offline EUVL  Europe
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Just replied your PM.
Sorry for the inconvenience.
Circuit is essentially same as .asc file.


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