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Referenz - high-quality low-cost diy-friendly amplifier
Referenz - high-quality low-cost diy-friendly amplifier
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Old 6th January 2019, 06:35 PM   #1
vzaichenko is offline vzaichenko  Russian Federation
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Referenz - high-quality low-cost diy-friendly amplifier
Arrow Referenz - high-quality low-cost diy-friendly amplifier

The design files were updated - please use the files from post #20

The time has come to publish something really DIY-friendly

Please welcome Referenz - a relatively simple low-cost amplifier, utilizing current-mode amplification.
Low distortion, low noise. Power rating: 100W @ 8 ohm / 200W @ 4 ohm.
The amplifier consists of IPS module and OPS module.
Two OPS variants are included - complementary and quasi-complementary.
Both variants employ commonly-available inexpensive HexFETs.

It's not live-tested yet, so early adopters may face some amendments.
At the same time, some solutions used in this design are rather mature, being used earlier in the other designs.

Jeff has designed cool single-sided layouts.
Questions are welcome - the builds will be supported.

Cheers,
Valery
Attached Images
File Type: jpg 01 Referenz Input @Sch 1.2.jpg (166.8 KB, 1290 views)
File Type: jpg 02 Referenz Output @Sch 1.2.jpg (209.9 KB, 1306 views)
File Type: jpg 03 Referenz Output Quazi @Sch 1.2.jpg (210.4 KB, 1268 views)
File Type: jpg 01 Referenz Input.JPG (66.6 KB, 1211 views)
File Type: jpg 02 Referenz Output.JPG (98.5 KB, 1157 views)
File Type: jpg 03 Referenz Output Quazi.JPG (96.7 KB, 371 views)
File Type: jpg @Referenz Loop Analysis.jpg (132.4 KB, 338 views)
Attached Files
File Type: zip Referenz Files.zip (357.5 KB, 75 views)
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Last edited by vzaichenko; 8th January 2019 at 11:06 AM.
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Old 6th January 2019, 06:56 PM   #2
thimios is offline thimios  Greece
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New year first project?
Lets see what we can do.
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Old 6th January 2019, 07:01 PM   #3
vzaichenko is offline vzaichenko  Russian Federation
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Referenz - high-quality low-cost diy-friendly amplifier
Quote:
Originally Posted by thimios View Post
New year first project?
Lets see what we can do.
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Old 6th January 2019, 07:23 PM   #4
Idefixes is offline Idefixes  France
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HI Valery,
Happy new Year to you. Take a look a skype Please.

Marc
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Old 6th January 2019, 08:51 PM   #5
vzaichenko is offline vzaichenko  Russian Federation
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Referenz - high-quality low-cost diy-friendly amplifier
Quote:
Originally Posted by Idefixes View Post
HI Valery,
Happy new Year to you. Take a look a skype Please.

Marc
Hi Marc, happy New Year! Thank you for observation - on both OPS schematics Q10 must be IRFP240 - the symbol is right (n-channel), but the marking is strangely mistaken. I will reload the corrected diagrams soon.
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Old 6th January 2019, 10:17 PM   #6
minek123 is offline minek123  United States
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Valery, have you changed the scale of your diagrams?
Suddenly they are much more readable

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Originally Posted by vzaichenko View Post
The time has come to publish something really DIY-friendly
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Old 6th January 2019, 10:32 PM   #7
jwilhelm is offline jwilhelm  Canada
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I never noticed the typo in the schematics either. Thanks Marc.

I changed the line display thickness in Diptrace to make the printed schematics more legible. I think these settings remain when Valery prints from them.
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Old 7th January 2019, 01:33 AM   #8
vzaichenko is offline vzaichenko  Russian Federation
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Referenz - high-quality low-cost diy-friendly amplifier
Yes, those thicker lines make the diagrams looking much better.
PDF files in the zip archive make them even more convenient as they scale easily.
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Old 7th January 2019, 03:02 PM   #9
thimios is offline thimios  Greece
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I can't call this home etching friendly,especially the hole pads.
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Old 7th January 2019, 03:27 PM   #10
vzaichenko is offline vzaichenko  Russian Federation
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Referenz - high-quality low-cost diy-friendly amplifier
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I can't call this home etching friendly,especially the hole pads.
Emmm... we actually tried to use "fatter" pads, but some of them still appear to be rather thin Something to improve in the next version
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