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Old 18th September 2010, 03:15 AM   #11
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This is the "Shrine" amp, based on a standard Hammond case that happens to be a 6" cube. This was the first tube amp that I completed (though not the first that I started...). The case was the inspiration for the amp, as I imagined something with all the guts inside and tubes on top, then labored to make the conception a reality. Input is a pair of PN4393 jfets, each cascoded with a 6C4 triode. Outputs are the venerable 1625 beam power tetrode (12V version of 807 - cheap, cheap, cheap) operated in UL mode. Output iron is Edcor GXSE-15-8-5k (old open frame stuff rather than the new product w/end bells). There's an SMPS inside to make everything go. The picture shows the first version with blue LED and plate wires, with Edcor XSE output iron. The current incarnation sports yellow LED and wires (easier on the eye) with the GXSE iron inside, and a new, quieter SMPS.
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Old 18th September 2010, 08:44 AM   #12
Arnulf is offline Arnulf  Europe
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Wrenchone, any chance to see your SMPS schematics ?
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Old 18th September 2010, 03:33 PM   #13
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Wrenchone, any chance to see your SMPS schematics ?
+1

I've built switchers but not optimized for tube amp B+

Trade secrets?
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Old 18th September 2010, 05:43 PM   #14
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Some nice ones were posted here -

http://www.diytube.com/phpBB2/viewtopic.php?t=3064
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Old 18th September 2010, 07:42 PM   #15
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The SMPS schematics wouldn't do much good if you don't have access to the materials and the facilities to make the transformer.
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Old 18th September 2010, 07:47 PM   #16
M Gregg is offline M Gregg  United Kingdom
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Originally Posted by wrenchone View Post
The SMPS schematics wouldn't do much good if you don't have access to the materials and the facilities to make the transformer.
Yes, however we could drool over them! LOL
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Old 18th September 2010, 08:57 PM   #17
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Default Spudnik One!

Spudnik One

A little over one watt per channel using 6S45P with series anti-triode; parafeed output using AMVECO 25VA potted toroids. Powered from a 12V wall wart using internal RECOM DC-DC converters.

Cheers,

Michael
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Old 18th September 2010, 09:59 PM   #18
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Quote:
Originally Posted by Michael Koster View Post
Spudnik One

A little over one watt per channel using 6S45P with series anti-triode; parafeed output using AMVECO 25VA potted toroids. Powered from a 12V wall wart using internal RECOM DC-DC converters.

Cheers,

Michael
Very cute thingy!
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Old 18th September 2010, 10:24 PM   #19
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Spudnik One
That is seriously cute Michael.

dave
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Old 18th September 2010, 10:31 PM   #20
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damn! I am in awe of the skills on display here...
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