VSSA Through-Hole Version by Jason - diyAudio
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Old 3rd January 2014, 02:28 AM   #1
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Default VSSA Through-Hole Version by Jason

I decided to produce a new board, this time for TO-247 devices and include some options on it like CCSs and VBE multiplier for bias control (not thermally linked). The more basic TO-3 version I showed in Shaan's PeeCeeBee thread worked well and I thought I'd update to more typical outputs and show this here.

I will periodically update this post as a reference. I can't manage the attachments so as an alternative I will post links here to the post that contains the relevant information.

-------------------------------

Current issue are Rev'C' boards:

Dimensions are 3" wide by 4" tall.

Bill of Materials, Schematic and Drill Template
Calibration / Set-up
Gerber and Excellon
Graphic set-up sequence
Mouser BOM
Attached Images
File Type: jpg VSSA Photoview.JPG (815.5 KB, 2210 views)
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Last edited by jkuetemann; 6th April 2014 at 07:22 PM. Reason: Maintenance
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Old 3rd January 2014, 04:14 AM   #2
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Nice!
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Old 4th January 2014, 11:49 PM   #3
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Not too sure how long it will be before I see the results, but I 'pulled the trigger' and ordered 20 after final checks were complete. When they arrive I will populate them and test. Here's hoping they are 100%
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Old 4th January 2014, 11:55 PM   #4
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Nice PCB, proud you've put my name on silk screen hehe

If it possible take 2 mm FR4, lower Z between the layers
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Old 4th January 2014, 11:56 PM   #5
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So will you be offering any of those 20 for sale?

I have to say that the TO-3 version I got from you sounds every bit as good as the one in this thread. Of course, someone has to be able to find the TO-3 devices. The TO-247's are much easier to acquire. I would be interested in a pair of boards if you are so inclined.

Blessings, Terry
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Old 5th January 2014, 12:20 AM   #6
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@Terry - Once they are fully proven, then quite likely the surplus will be offered.

@LazyCat - The order is in and they will be on 1.6mm FR4, 1oz copper. And of course you are given credit for the concept, I honestly wouldn't want any one to think it is anything more than my implementation or 'spin' on the basic VSSA.
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Old 5th January 2014, 12:27 AM   #7
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Quote:
Originally Posted by still4given View Post
So will you be offering any of those 20 for sale?

I have to say that the TO-3 version I got from you sounds every bit as good as the one in this thread. Of course, someone has to be able to find the TO-3 devices. The TO-247's are much easier to acquire. I would be interested in a pair of boards if you are so inclined.

Blessings, Terry
How many devices did you recover from that old amplifier you recycled to get the TO-3 transistors? Just curious.
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Old 5th January 2014, 01:23 AM   #8
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Quote:
Originally Posted by Lazy Cat View Post
Nice PCB, proud you've put my name on silk screen hehe

If it possible take 2 mm FR4, lower Z between the layers
Yes , the VSSA is original .. your name will also go on my VSSA-H IPS.

I HAD to "stroke the cat" for an excellent design.

OS
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Old 5th January 2014, 01:24 AM   #9
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I got 4 pair so I still have two pair for another amp. Looking forward to finding another design to use them in.

If I can get a pair of these new boards you have made I want to try them with an SMPS for power.
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Old 5th January 2014, 01:27 AM   #10
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Originally Posted by ostripper View Post
Yes , the VSSA is original .. your name will also go on my VSSA-H IPS.

I HAD to "stroke the cat" for an excellent design.

OS
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