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connector for DC cable

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Posted on June 3, 2015 at 12:13:55
paco
Audiophile

Posts: 1520
Joined: April 26, 2000









hi there,

a new PSU for my DAC is reaching me in a couple of days; i'm planning to replace the stock DC cable by a new, DIY one; for cable i'll use some shielded IC, and for plug i'll use the Oyaide 2.1 one; the problem is the other side of the stock cable, which uses a rather unusual socket (male) and plug (female); it seems to me they are Aviation Plug GX12-2P;my questions:

1. is there any audiophile version of that connector?
2. how to connect the shield? it seems there is no ground available on those connectors, but the PSU has indeed a ground, since the AC input is the usual one

TIA! best, paco

 

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RE: connector for DC cable, posted on June 3, 2015 at 13:10:56
Duster
Manufacturer

Posts: 17117
Location: Pacific Northwest
Joined: August 25, 2002
It's a multipin microphone connector intended for aviation, ham radio, CB microphone applications. To the best of my knowledge, here is no audiophile version available. I find the design to be acceptable for an audiophile DC power supply application. Better than a typical coaxial barrel type DC plug, IMO. There is no provision to terminate a ground wire for a shield, but you can run a drain wire out of the back of the connector and fasten it to the enclosure chassis, or to the outside of the connector. I purchased one for an unshielded DIY DC umbilical project from this eBay seller (see link below):

 

RE: connector for DC cable, posted on June 3, 2015 at 16:41:29
DrN
Audiophile

Posts: 366
Joined: January 31, 2014
I have that PS and Cable on my Chord DAC. It's made very well and nothing wrong with that DC power cable it's made nice, actually the connectors are solid. Why change anything?

 

thanks! (nt), posted on June 3, 2015 at 22:23:45
paco
Audiophile

Posts: 1520
Joined: April 26, 2000
.

 

RE: connector for DC cable, posted on June 3, 2015 at 22:25:21
paco
Audiophile

Posts: 1520
Joined: April 26, 2000
you may well be right; i'll wait until try them, and perhaps the only change i'll do is locating the PSU very close to my DAC, and shorting the DC cable accordingly; best, paco

 

RE: connector for DC cable, posted on June 4, 2015 at 04:40:26
DrN
Audiophile

Posts: 366
Joined: January 31, 2014
I had messed with the DC cable on a Monolithic Sound Phono PS. I made solid silver wire and it didn't make a difference in fact the original cable sounded really better. The only DC cable that I have read, not used, that made a difference for the Monolithic were these> http://www.revelationaudiolabs.com/
I never tried because they are too expensive, and they had a bad reputation filling orders.

Wait till the PS comes in.

 

RE: connector for DC cable, posted on June 5, 2015 at 17:09:48
DrN
Audiophile

Posts: 366
Joined: January 31, 2014
I would also look to upgrade the AC power cable on it.

 

RE: connector for DC cable, posted on June 6, 2015 at 08:27:14
paco
Audiophile

Posts: 1520
Joined: April 26, 2000
yep indeed! a beautiful Acrolink 7N with Oyaide 079 connectors is waiting for the PSU to arrive!

 

RE: connector for DC cable, posted on June 6, 2015 at 10:13:16
Duster
Manufacturer

Posts: 17117
Location: Pacific Northwest
Joined: August 25, 2002
That particular power cord configuration should be a fine choice. For use with a similar power supply unit, I built an Acrolink 7N-P4020III power cord terminated with Oyaide P-079 AC plug and Oyaide C-079 IEC connector, and find it to be a worthy expense for the inexpensive PSU. I also built a DIY DC umbilical using mil-spec SPC/PTFE Teflon wire, which performs substantially better than the stock PVC DC umbilical. You might also consider a set of four Herbie's Audio Lab Baby Bootie footers for use under the small footprint PSU.

See link:

 

RE: connector for DC cable, posted on June 6, 2015 at 23:13:03
paco
Audiophile

Posts: 1520
Joined: April 26, 2000
thanks! as for 16 AWG silver plated copper in teflon to use as DC cable, i can get this one locally; the specs look great to me

 

RE: connector for DC cable, posted on June 8, 2015 at 10:41:01
Duster
Manufacturer

Posts: 17117
Location: Pacific Northwest
Joined: August 25, 2002
I recommend wrapping the twisted pair with a thick, heavy duty PTFE/Teflon plumbers tape in order to keep the wires intimately twisted together, and to provide a level of resonance control. Use the thick dark gray product, not the very thin typical white colored product, since the thicker gray product will be much easier to wrap around the twisted pair, and will only require 1 layer for the task. Cover the DIY DC umbilical with Techflex sleeving.

Here's a US product (see link below). There must be an equivalent product available in Europe.

 

RE: connector for DC cable, posted on June 8, 2015 at 23:29:20
paco
Audiophile

Posts: 1520
Joined: April 26, 2000
good idea! i'll try... also, did you try the tape below, as a final touch?

 

RE: connector for DC cable, posted on June 9, 2015 at 15:16:58
Duster
Manufacturer

Posts: 17117
Location: Pacific Northwest
Joined: August 25, 2002
Oyaide MWA-010T tape features a ferrous material called Sendust with inductive properties not unlike a ferrite bead/core, which tends to do more sonic harm than good when implemented as noise filters positioned on audio cables and power cords. That said, Oyaide claims MWA-010T doesn't degrade audio performance, but other than the Highwire Audio Power Wrap featuring both a high permeability material together with a dissipative material (which can also be unpredictable in terms of truly satisfactory audible benefits), I'm not convinced that a ferrous sheet is a good idea to wrap around any type of cable for audiophile purposes unless I hear the effects with my own ears. While there are a number of applications which benefit from the use of noise filtering sheets, a DC umbilical which doesn't emit detrimental noise in its own right is not the right location to battle noise generated within an audio system via noise filtering sheets, IMHO. A DC umbilical featuring a tightly twisted pair, or a twisted pair with braided shield is sufficient to reject RFI, EMI, digital hash emanating from other cables, cords, and components within an audio system. However, there's no reason other than the expense as to why you shouldn't experiment with Oyaide MWA-010T tape applied to a DC umbilical.

 

RE: connector for DC cable, posted on June 11, 2015 at 12:01:42
David Pritchard
Audiophile

Posts: 227
Location: New Mexico
Joined: February 5, 2008
Duster - You strike again with a good observation. My DC power cord for the Serius Receiver upgrade has a Ferrite filter on the cord. Time for another before and after test!

 

RE: connector for DC cable, posted on June 17, 2015 at 15:24:49
Duster
Manufacturer

Posts: 17117
Location: Pacific Northwest
Joined: August 25, 2002
BTW, did you see my instructions for a DIY mil-spec wire DC umbilical project?

 

RE: connector for DC cable, posted on June 20, 2015 at 12:19:41
Posts: 55
Location: new hampshire
Joined: May 25, 2004
can you post those directions?
thanks

 

RE: connector for DC cable, posted on June 20, 2015 at 12:29:14
paco
Audiophile

Posts: 1520
Joined: April 26, 2000
sorry, what directions?

 

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