DIY DC power cables

[pl_svn]

1 minute ago, Daudio said:

Don't be a tease. name names !

 

AQ. but... let's wait for John's approval of the "electrically charging" the shielding before jumping on them

[R1200CL]

For a 20 cm DC plug it may be an overkill to add the JS Shield guidelines. (JSSG). Also a challenge to implement. Though a metal housing may operate as a Faraday cage. Could this assumption be correct ?

 

However I'm thinking of adding JSSG to USB and Ethernet cabling would be very interesting. And again using proper connectors. 

 

After finishing with the DC cable with our Chinese friend, I was thinking of having him implementing JSSG into such cables.

 

Using same Belden as Blue Jeans, but a heavy duty connector, like the Vodka has. 

 

For USB, I'm wondering if making it with two separate cables, one for Vbus and one for signal, both shielded of cause. But I need some updated JSSG on  that one ?

On the other hand we rather spend our money on the USPCB...!

 

[pl_svn]

30 minutes ago, R1200CL said:

For USB, I'm wondering if making it with two separate cables, one for Vbus and one for signal, both shielded of cause.

 

Michael makes a very nice, unshielded, USB cable with vBus and ground separated from Data +/-

at the moment I'm using his Isolate Cu (no vBus) between Aries and USB Regen but I'll order one of the above as soon as I get my Iso Regen, which needs vBus

[Middy]

I have Lapp AC power cables on my kit with the shield going to earth on one side as was the prescribed old way I was taught.

It won't be much effort to cut that end free and tack on an outside wire. 

But lucky we have Michael here for those who cant?

My power cables put me off trying new things as after spending on DIY materials.. there was no effect to my ears.

I should get a chance this weekend to rectify things.

Thanks everyone BTW for making this a great stress free fun thread.

Cheers

Dave

[Michael-Elijah Audio]

6 hours ago, R1200CL said:

 

I think you misunderstood. 

 

If you use the new UpTone USPCB between MicroRendu and ISO regen, then you may have a challange. 

 

@Superdad have not put any measurements on his website yet

IF you look at the photo's of the USPCB in the press release you can see that even with the Heatshrink it will be just a bit wider than the width of an "A" metal shell

I sure it's finished size is not going to present any problems

[Jud]

6 hours ago, pl_svn said:

 

AQ. but... let's wait for John's approval of the "electrically charging" the shielding before jumping on them

 

Omega Mikro has battery-connected copper mesh surrounding their ribbons.

[jaaptina]

15 hours ago, JohnSwenson said:

So there you have it, shielding DOES work, but only if you provide a path from one end of the shield to the other. This is effective even if you don't connect the shield to anything else.

 

John 

 

Hi John, thanks for this knowledge. It's great to be able to built something audio related myself. Can you also share your thoughts on AC power cables sometime in the near future? 

[JohnSwenson]

8 hours ago, pl_svn said:

 

actually there is a well known manufacturer using this kind of shielding in their most expensive cables

but as far as I understand it... they're also applying some "current" (using a dedicated battery, I believe) to the "shielding wire"

I looked at the AQ DBS system it is not the same thing. There is a separate wire in the center of the cable, but only one end is connected, to the + side of a battery. It is not connected to the shield at either end. Now someone COULD take this cable and connect both ends to the shield, which would provide effective shielding, but again it is near the signal wires which could cause problems.

 

I also looked at NDS, which doesn't do it either, it has extra shields over the inner shield which are supposed to dissipate RF, but they, as far as I can tell, are not electrically connected to anything. If they just used my approach they wouldn't need the extra shields.

 

John S.

[Daudio]

5 hours ago, Michael-Elijah Audio said:

IF you look at the photo's of the USPCB in the press release you can see that even with the Heatshrink it will be just a bit wider than the width of an "A" metal shell

Michael,

I think the confusion here is that the concern is about the USPCB's length, not its width. Will there be enough room for the power connector and cable to bend out without interferring with the case of whatever is plugged into the other end of the very short USPCB ?

 

[Middy]

Looking at the rendu front for example would the other USPCB rotated work?

Stand the rendu on its edge?

Maybe an angled DC adapter that should allow it...

A bit of a let down with super DC cables... but would allow a down stream USPCB...

Sorry just thinking out loud DAUDIO ?

Don't mind me 

[R1200CL]

Guys. (Sorry haven't notice any female around) ?

 

I have pictures. Looking really nice. This guy is clever. 

 

Now, should I wait to post pictures until price is known or not ? 

 

(Use that green button please, no reply ?. Like to test if can be use as a possible poll later as well) 

[Michael-Elijah Audio]

3 hours ago, Daudio said:

Michael,

I think the confusion here is that the concern is about the USPCB's length, not its width. Will there be enough room for the power connector and cable to bend out without interferring with the case of whatever is plugged into the other end of the very short USPCB ?

 

OK - got it - but only if using it between PC/Streamer and ISO Regen, which is not it's intended purpose

[Daudio]

9 minutes ago, Michael-Elijah Audio said:

OK - got it - but only if using it between PC/Streamer and ISO Regen, which is not it's intended purpose

 

Well, I have a Regen connected with a hard adapter to the output of an Intona, and it's a bit of a tight fit for an ordinary barrel conn/cord between the two.

 

And if we would think on it more, could probably come up with other situations, then just these two   

 

Come to think of it, this seems like a good application for a right-angle connector. Not any gold plated, that I know of, but the ones I've used fit tight enough and had no problems soldering 'normal' wire 

 

[Michael-Elijah Audio]

Have just ordered 2 of these - will need to be modified to accept larger dia. cable - but I can see the spacing between Hot pin and Gnd pin may ease build

 

 

[Daudio]

23 minutes ago, Michael-Elijah Audio said:

Have just ordered 2 of these - will need to be modified to accept larger dia. cable

 

That looks all too familiar !  You should have PM'ed me, cause I have far too many of those for my needs 

 

The only way I can see to modify that device for the kind of wire gauge in vogue here is to cut out the back of the two shells (the side opposite the metal barrel). and then add a heat-shrink sleeve to contain the center conductor wire. Do-able. Using a flush cutter to chop out that back ridge, with file cleanup, will quickly make a trough in the box for the 2nd big wire (through probably bigger then the hole in the solder tab ).

 

[Jud]

Should be dead easy to use the screw terminals with pin as a right angle connector, right?

[Michael-Elijah Audio]

World's first gold plated, right angled, Swenson sheilded, 18 AWG, star quad DC cable.....

[zerung]

3 minutes ago, Michael-Elijah Audio said:

World's first gold plated, right angled, Swenson sheilded, 18 AWG, star quad DC cable.....

 

Very innovative Michael. Is the black wire ground wire?

[Daudio]

59 minutes ago, Michael-Elijah Audio said:

World's first gold plated, right angled

 

Ok, great job, but spill the beans on where/how you came up with the right angle connecter ! Home made perhaps ?  And why tease us with that crummy old Amazon thing

[Michael-Elijah Audio]

17 minutes ago, Daudio said:

 

Ok, great job, but spill the beans on where/how you came up with the right angle connecter ! Home made perhaps ?  And why tease us with that crummy old Amazon thing

It's a recycled Elec plug( without casing) -just bent the Gnd tab/strain relief 90 degrees

Had to use 19mm Heatshrink ( 3:1) to fit over the right angle

And yes, as per John's instructions the black wire is the loop completer Gnd wire

[Forehaven]

Damn nice job Michael! Can you point me to John's post where he discussed this external ground wire in how to wire iit up to DC connector? 

Thanks

chris 

[pas]

25 minutes ago, Forehaven said:

Damn nice job Michael! Can you point me to John's post where he discussed this external ground wire in how to wire iit up to DC connector? 

Thanks

chris 

Page 9 of this thread.

[Michael-Elijah Audio]

As per John's instructions - that black Gnd wire is attached to either end of the external woven copper shield, to complete the loop.

I just left the clear Heatshrink about 3/4 of an inch short on each end to attach the black wire, then covered the join with black heatshrink

[Middy]

Hey Mike thanks for putting a smile on my face after a rough week thank you?

 

Does it have to run parallel with the cable shield to get full 'electron field '   interaction. I was going to use small cable ties for my power cable?

 

I say this like I  am more quoting Star trek, than John's theory.

Phasers to stun btw... ?

 

Kind regards

Dave

[Michael-Elijah Audio]

Just trying to follow John's instructions as closely as possible - He did say to not wrap it tightly around the cable - so to me that means let it hang loose

Haven't tested it yet as I have to make up a GX16 to female 2.1mm socket - but as someone else mentioned earlier  - probably not really noticeable on a 30cm cable

I did actually make the cable just so I could use that opening line...............

As we say here in Australia - " It's got everything but the kitchen sink"