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02-19-2009, 07:32 PM
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100+ Head-Fi'er
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Join Date: Feb 2008
Location: NYC metro area
Posts: 217
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Quote:
Originally Posted by wiatrob
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So you just used one of the rings from the protective cage.
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Home: ALAC - Squeezebox Duet - VDA-2 (VAC-1) - VHP-2 (DIY AC PSU) - K701/ESW10JPN
Vinyl: MMF-5.1 - VPP-1 (VAC-1) - SSMH - K701
Work: Mac Powerbook - Pico DAC/Amp - ESW10JPN
Mobile: iPod Touch - LOD - CMoy - ER 4P
Workout: iPod Shuffle - KSC-75/Senn CX-300
DIY Builds: CMoy, TREAD PSU, "Pre-STEPS" AC PSU, Starving Student Millett Hybrid
In Progress: Alex Cavalli "Bijou"
Review: K701 vs. HD 600
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02-19-2009, 08:19 PM
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500+ Head-Fi'er
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Join Date: May 2007
Location: Central NJ USA
Posts: 551
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Quote:
Originally Posted by V-DiV
So you just used one of the rings from the protective cage.
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Yes (thanks waitrob), since you can roll a lot of tube types in this amp, only using 1 of the 3 rings in a protector (to not inhibit tube rolling).
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Current: Work: Sony D-777 (or Gen 5.5 iPod) -> Compact Tube Hybrid (CTH) -> DT-880 (2003)
Home: Rotel RCD-961 -> Budget B22 -> modded Denon D2000s
Past: SR80, HD580, HD595, K701, SOHA, Mini3, 40GB 3 gen w/DIYMod done
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02-19-2009, 08:37 PM
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Headphoneus Supremus
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Join Date: Oct 2008
Location: mtn view, ca
Posts: 2,648
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here's an AMB gamma1 usb driver board, configured as a usb to spdif (both opto and coax) converter.
its self powered (usb bus) and both outputs are active at the same time. it supports up to 16bit/48k rates (usb1.1).
__________________
Phones: hd-580, DIY hd-650
Amps: motorized remote pimeta, PPAv1 (rackmount), PPAv1 in Hammond, minimax, Beta22, Sigma22, pimeta-v2,
DACs: BantamDAC,gamma1,gamma1-spdif, DACmaster/gamma2,SPDIFmaster spdif coax/opto switch
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Website:http://www.netstuff.org/audio/
"Everybody's tied up in a solid state; Nobody's without twin reverb." -george harrison
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02-20-2009, 04:42 AM
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1000+ Head-Fi'er
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Join Date: Apr 2007
Location: Sydney
Posts: 1,031
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^ Very nice work indeed!
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Feedback
Main Head: Mac Mini | Benchmark DAC1USB | Sennheiser HD650
Second Head: Airport Express | Benchmark DAC1 | Shure SE530
Portable Head: iPod Nano | ALO Super Cotton Dock | Pico | Shure SE530 & Etymotic ER4s
Speaker 1: Benchmark DAC1USB | Musical Fidelity A3.5 | Krix Neuphonix
Speaker 2: Macbook Pro | KingRex T20U | Quad 12L
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02-20-2009, 04:53 AM
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1000+ Head-Fi'er
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Join Date: Apr 2008
Location: Golden, CO
Posts: 1,016
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Alright, I couldn't stop messing with it. Now it's really, really done. I swear.
Switched out LE2 to be an amber tube uplight, fab'd opague window over LE1, attached tube 'rollbar.'
Done. Really!
Promise, last you'll see! 
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02-20-2009, 06:57 AM
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Headphoneus Supremus
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Join Date: May 2008
Location: Vancouver, BC
Posts: 1,673
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A single ended Opus DAC. Cost just under $300 (keep in mind I burned $50 on two Sonicaps .gif "Confused Face(1)") )
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02-20-2009, 07:30 AM
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Headphoneus Supremus
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Join Date: Mar 2006
Location: San Francisco, CA
Posts: 6,647
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Quote:
Originally Posted by rds
A single ended Opus DAC. Cost just under $300 (keep in mind I burned $50 on two Sonicaps ) |
Looks nice, congrats, but GET THAT GROUND WIRE AWAY FROM THE CENTER PIN OF THE TRANSFORMER!
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Portable: 240GB diyMod 5.5G -> V-Cap Dock -> PPAS -> UE700
Office: Gamma1 -> PPAS -> K271
Feedback
Digital Audio Primer
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02-20-2009, 07:49 AM
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Headphoneus Supremus
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Join Date: Aug 2006
Location: Portland , OR
Posts: 1,614
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Quote:
Originally Posted by wiatrob
Alright, I couldn't stop messing with it. Now it's really, really done. I swear.
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Looks very good , especially like the wood and the "e12" indicator - nice touch ..dB
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02-20-2009, 07:50 AM
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Headphoneus Supremus
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Join Date: May 2008
Location: Vancouver, BC
Posts: 1,673
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Quote:
Originally Posted by FallenAngel
Looks nice, congrats, but GET THAT GROUND WIRE AWAY FROM THE CENTER PIN OF THE TRANSFORMER!
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Never fear, that is just a convenient way to ground the case 
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02-20-2009, 08:11 AM
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Headphoneus Supremus
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Join Date: Mar 2006
Location: San Francisco, CA
Posts: 6,647
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Quote:
Originally Posted by rds
Never fear, that is just a convenient way to ground the case |
It also creates a shorted turn for the transformer and that's NOT GOOD.
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Headphones: HP-2, RS-1, SR-200, Sennheiser HD-600, HD-650, Denon D-5000, AKG K271
Portable: 240GB diyMod 5.5G -> V-Cap Dock -> PPAS -> UE700
Office: Gamma1 -> PPAS -> K271
Feedback
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02-20-2009, 09:00 AM
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Headphoneus Supremus
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Join Date: May 2008
Location: Vancouver, BC
Posts: 1,673
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Quote:
Originally Posted by FallenAngel
It also creates a shorted turn for the transformer and that's NOT GOOD. |
It does look suspiciously close, but only one end of the "loop" is connected to ground 
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02-20-2009, 05:25 PM
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100+ Head-Fi'er
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Join Date: Mar 2008
Location: north herts UK
Posts: 271
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I think he means if grounded at both ends, which it is!!!, the bar through the middle is acting as a winding in the transformer creating a potentially dangerous situation! IE: only one end should be grounded and as the case is grounded no other connection should be made... well that's how I understand it but I may be wrong!!
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cable: nordost flatline blue heaven
Amp: earmax pro
headphones: hd565 ovation
hd 650
http://www.flickr.com/photos/onform1/
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02-20-2009, 05:53 PM
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1000+ Head-Fi'er
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Join Date: Aug 2004
Location: California
Posts: 1,358
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As I understand it, rds is safe as long as his cap for the transformer is separated from the transformer by a gasket. The location of the connection is not optimal nor recommended IMO, but it's not a shorted turn from what I can see (and assuming that gasket material was used).
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02-20-2009, 07:21 PM
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500+ Head-Fi'er
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Join Date: Jul 2007
Location: New York City, USA
Posts: 629
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Quote:
Originally Posted by Nebby
As I understand it, rds is safe as long as his cap for the transformer is separated from the transformer by a gasket. The location of the connection is not optimal nor recommended IMO, but it's not a shorted turn from what I can see (and assuming that gasket material was used).
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Maybe so, but there are several other places that he could have grounded the IEC to the chassis without using the transformer bolt. For instance, any of the standoffs.
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02-20-2009, 07:36 PM
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1000+ Head-Fi'er
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Join Date: Dec 2006
Location: Flagstaff, AZ
Posts: 1,118
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Even if it isn't a shorted turn. Using the transformer's mount as the connection spot usually adds noise to the signal. If he used an insulator in the mounting hardware, so there isn't a shorted turn, and he can't hear any noise, he should be fine.
If it was me though, I would find another spot to ground the power plug.
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