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Old 30th January 2008, 06:26 AM   #1
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Default Tube Headphone Amp

If you're in the Boston area, feel free to come by and give it a listen. I also have my just finished EL84 triode PP amp hooked up to some Cerwin Vega D-7's and a modded PS1.

http://boston.craigslist.org/gbs/ele/556136975.html

p.s. price is not quiiiite as firm when it's guys from my forums
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Old 30th January 2008, 12:26 PM   #2
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Hi,
Cool looking amp! Do you have a schematic to share?

Kind regards,
ck
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Old 30th January 2008, 04:42 PM   #3
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sure, I do.

Click the image to open in full size.
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Old 30th January 2008, 06:01 PM   #4
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sale pending...
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Old 9th February 2008, 06:50 PM   #5
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Sale fell through, amp is still available

new CL ad:
http://boston.craigslist.org/gbs/ele/568484943.html

thanks!
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Old 10th February 2008, 08:38 PM   #6
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Nice amp! Could you share the PSU schematic and who the transformers are from?
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Old 12th February 2008, 02:35 AM   #7
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Thanks! I'm not sure I can find the schematic but I remember it well enough off the top of my head. The transformers are two 6.3VCT 6A Hammond models, which I took apart. I stripped the bells, painted them orange, and then clearcoated. The PSU consists of one transformer feeding the three heaters, then feeding back-to-front intot the other transformer, which has a doubler on the 120V "secondary" with UF4007's and 100uF caps. There's a LC filter with 10H/550uF, which feeds the WCF B+, then stereo split RC filters for the GC stage which direct couples into the WCF. Makes more sense when drawn out but that's what it is.. All electrolytics except those in the doubler are bypassed with Solens.
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