Greg Balls GB150D and SKpre documentation and schematics

[kmj]

Hi, I was looking for some documentation on a kit I got ahold of, the GB150D by Greg Ball.
Greg has closed down his online forum and thus removed the documentation, he also released the designs to the DIY comunity.
Or so I understand.
I got in contact with one of Gregs former coworkers and he scanned the documentation for the power amplifier "GB150D" and the pre amplifier "SKpre".
He is getting old and his health is deteriorating, so he asked me to see to it that those who need the documentation gets it.
He also assured me that Greg himself doesn't care.
I attached the documentation but bare in mind that the pages are not all in order and there could be a page or two missing.

So, any interest in doing something with it?

 

[dreamth]

We want any possible documentation from Greg Ball.There's no question about it.Where is it?

 

[poseidonsvoice]

There is another old thread on this:

https://www.diyaudio.com/community/threads/ska-gb150d-now-public-domain.238593/

And Jim’s Audio already sells the PCB’s from what I remember…

Best,
Anand.

 

[kmj]

We want any possible documentation from Greg Ball.There's no question about it.Where is it?

It seems the file was to large.
I compressed them and attached them again.

I would ask a favor.
If anyone used the document to develop a PCB I would ask for the files for producing those PCBs be posted here.
Since the file is freely given, no one should make money out of it.

 

[kmj]

There is another old thread on this:

https://www.diyaudio.com/community/threads/ska-gb150d-now-public-domain.238593/

And Jim’s Audio already sells the PCB’s from what I remember…

Best,
Anand.

Yeah, for profit and without the approval of the designer from what I remember.

 

[dreamth]

Well...it was made public domain by the designer himself at the time...and the profit wasn't that obvious...

 

[gpapag]

Apart from the thread mentioned already:

https://www.diyaudio.com/community/threads/ska-gb150d-now-public-domain.238593/

there are two more threads dedicated to Greg Ball’s amplifier:

https://www.diyaudio.com/community/threads/simple-killer-amp-listening-impressions.72172/

https://www.diyaudio.com/community/threads/simple-killer-amp-constructor-thread.74174/

George