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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Looking for schematic for SKA SKPre and SKoptivol
Looking for schematic for SKA SKPre and SKoptivol
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Old 19th October 2019, 03:48 AM   #1
hirscwi is offline hirscwi  United States
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Looking for schematic for SKA SKPre and SKoptivol
Default Looking for schematic for SKA SKPre and SKoptivol

I am trying to track down a schematic for Greg Ball's SKA SKPre (preamp) and the SKOptivol module that works with it. I've searched the web to the best of my ability but keep getting to a dead end. Any help will be appreciated. I believe Greg is out of touch these days but if anyone knows how to contact him, perhaps that would help. Thanks.

Last edited by hirscwi; 23rd October 2019 at 05:54 PM.
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Old 19th October 2019, 01:18 PM   #2
Ken Newton is offline Ken Newton  United States
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SKA:

SKA GB150D now public domain...
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Old 19th October 2019, 01:46 PM   #3
Ken Newton is offline Ken Newton  United States
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I didn't readily find anything on the SKPre or SKOptivol either.

The designer, Greg Ball, used to post here as 'amplifierguru', so you can search for his past comments. I haven't noticed any posts by him for quite some time, come to think of it.
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Old 19th October 2019, 10:17 PM   #4
hirscwi is offline hirscwi  United States
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Looking for schematic for SKA SKPre and SKoptivol
I think Greg is out of commission or at least he was for a while. I could not find anything in the GB150 thread. I've built the 150 and it's a nice amp. I have the SKpre and Optivol kits but the PCBs don't give component values, so I need a schematic or bill of materials.

I'll try searching for "amplifierguru" threads. That could be the trick.
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