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Old 23rd September 2012, 03:14 PM   #1
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Default FS: Atma-Clone/Proto amplifier

I am wondering if there would be any serious interest in an Atma-Sphere clone/proto type?

I have a very early Proto type from Atma-Sphere that uses 2x 12AT7's, a 6CG7 and 8x 6AS7 tubes per channel. Also has the Teflon Metal film rel-caps which cost me over $100! this is an Atma built proto that is pretty close to an MA1 I believe. about 50 watts of OTL triode power per channel.

Has singled ended and balanced inputs per channel. and works and sounds great. I had lent this to my father a number of years ago and didn't want to let it go! he used it every day for the last 2-3 years and I just finally got it back!

I also have a number of brand new 6AS7 russian tubes available. I will have to count But I think i bought 40 or more when i got the proto and I think there is about 24-26 left something like that. I have drawn out schematics and a bunch of related files and what not I will include on a cd.

I will upload pictures shortly. the proto is built into an old industrial chassis and has been "spiffed" up a bit. its not too bad looking but she definitely wont win any beauty contests!

This amp is best served to someone in the DIY community that understands tube electronics and high voltages and how to work around them safely! the amp has been 100% reliable since i dug it out of Atma's dungeon and rebuilt it! you will have no issues with it but should understand tube amps in general.

*** Atma WILL NOT Support this! don't even think about calling and asking! ***
Should you need assistance I will be glad to help and DIYaudio here is a great resource for assistance!

This is a BIG amp! and shipping will not be cheap. But i can pack it to survive!

Serious buyers would consider a price around $500 plus shipping. (extra tubes not included but we can talk about it)
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Old 23rd September 2012, 03:17 PM   #2
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WOW this really came out bad! I will have to work on some better pics...ugh
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File Type: jpg Atma.jpg (228.6 KB, 450 views)
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Old 23rd September 2012, 07:26 PM   #3
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hows the sound?
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Old 24th September 2012, 02:16 PM   #4
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Sounds like a lot of Triode OTL Atma sound!
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Old 24th September 2012, 07:01 PM   #5
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hey, I wont go on with the buy. good luck!
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Old 25th September 2012, 03:54 AM   #6
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Old 11th October 2012, 10:44 PM   #7
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This is still available!
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Old 11th October 2012, 10:57 PM   #8
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Pictures with the cover off!
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File Type: jpg 2012-09-25_18-51-21_678.jpg (434.8 KB, 235 views)
File Type: jpg 2012-09-25_18-51-43_148.jpg (437.7 KB, 232 views)
File Type: jpg 2012-09-25_18-52-49_927.jpg (487.6 KB, 220 views)
File Type: jpg 2012-09-25_18-53-11_404.jpg (468.0 KB, 219 views)
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Old 12th October 2012, 12:16 AM   #9
john65b is offline john65b  United States
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Email sent...
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Old 13th October 2012, 12:08 PM   #10
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Still available! cash/paypal only no trades please!
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