help w/ power umbilical + connectors for b22/s22

[el_matt0]

hey..straightforward enough given the title of the thread

...gotten to the point in my s22/b22 build that i need to buy the connectors for the power umbilical that runs between my s22(built) and future b22 (not built yet). im using jeff rossels 100VA s22 kit to power a 4 channel balanced b22. now, the amphenol tuchel connectors listed on the AMB site, i can only seem to find ONE of the two (male/female) in stock at mouser, and not at all at digikey. ive also been recommended neutrik SpeakONs which i BELIEVE are available through mouser (preference), but im not sure which exact 2 i need (panel mount/ cable mount, two of each). if anyone can help me in the right direction for those, to order to canada, id really appreciate it. also, for the cable of the umbilical itself, what are some decent choices, no idea where to really start looking for that either?

thanks guys

 

[rockcod]

Quote:

Originally Posted by el_matt0 /img/forum/go_quote.gif hey..straightforward enough given the title of the thread ...gotten to the point in my s22/b22 build that i need to buy the connectors for the power umbilical that runs between my s22(built) and future b22 (not built yet). im using jeff rossels 100VA s22 kit to power a 4 channel balanced b22. now, the amphenol tuchel connectors listed on the AMB site, i can only seem to find ONE of the two (male/female) in stock at mouser, and not at all at digikey. ive also been recommended neutrik SpeakONs which i BELIEVE are available through mouser (preference), but im not sure which exact 2 i need (panel mount/ cable mount, two of each). if anyone can help me in the right direction for those, to order to canada, id really appreciate it. also, for the cable of the umbilical itself, what are some decent choices, no idea where to really start looking for that either? thanks guys

The T3108 001 (male, cable-mount) has been replaced by C016 20H003 100 12 (black) or C016 20H003 100 10 (blue)

The T3111 000 (female, panel-mount) has been replaced by C016 20G003 100 12 (black)

Digikey has both, but little pricier than Mouser.

 

[el_matt0]

thanks, PERFECT. now with respect to the umbilical cable itself...what would be some solid choices? also, i assume that the 24 AWG teflon coated silver wire i bought for the rest of my hookup duties is probably too thin for ideally hooking up between my transformer and power entry module, i should be going with something thicker...around which gauge? or is 24 ok?

 

[n_maher]

Most of the information that your asking about is covered in depth at both amb's site and in the Headwize build thread. I know you've stated repeatedly that you've read all that but based on all of your questions you might want to do it again, and maybe again.

 

[el_matt0]

ok well here, howabout this nate

, to CLARIFY what ive read lol. since im not using backplane boards, and mine has 4 channels, my umbilical should have 12 separate wires right, and those should be 18AWG or bigger correct? im assuming the easiest is for me to just get some 18 gauge hookup wire and just twist and techflex the thing myself right? do those connectors that rockcod listed work for that many wires though..thats where im a little confused..in the pics ive seen of peoples builds, those connectors only usually have 3 wires in them, but mostly have been used in amps w/ the backplane board, so only 3 are needed in the umbilical in that case?

 

[el_matt0]

http://www.amb.org/audio/beta22/

my confusion stems a little bit from the very first diagram on this page..(the wiring and ground page if my link didnt work). it shows, when using a separate enclosure for the PSU, 3 wires leaving the sigma22 into the umbilical, and then AFTER the umbilical joins the beta22, it splits into 9 wires (for a 3 channel), and one would assume 12 for a 4 channel. is this what im aiming for...i should only actually have 3 wires leaving the pcb of the sigma22 itself to the umbilical? how do i "split" them into 12 wires, for each of my 3 b22 boards, "after" the umbilical then? or was i more on the right track with thinking that my umbilical should be 12 wires, and i should have all 12 leaving the terminal blocks of the s22? i know in fierce's b22 build, he has 12 wires leaving his s22, but its also housed in the same enclosure so idk if that changes anything or not. hopefully someone understands my confusion because i HAVE read and REread the amb site and this part in particular isnt getting much clearer...

 

[vvs_75]

I didn’t get to the point when I need to buy umbilical but when I do, here is my thoughts. I am collecting parts for balanced 4 b + 4S amp powered by 4 transformers. 4b boards will be in one enclose and 4s and 4transf. in another.
Since I am building with ability to drive not just headphones but full size speaker in mind here is my choice.

I am going to separate left and right channels so two S board will power two b board of each channel. Thus I have two cords – one for left and one for right.

So I am going to build two VH AUDIO DIY FLAVOR 4 cables.
Link
http://www.venhaus1.com/diymains.html



It’s the same as Flavor 2 but using unshielded star quad cable (4 x 12 AWG cryo)

http://www.vhaudio.com/wire.html


(from two s board we need two + and two – and one G that will go to the two b board on each their line separately.





So you need 5 pin connector to each cable in this case (+ +- - and one G for two boards) which I didn't found myself yet.

Also length of the cable I think should be minimum 2feet or 60sm to be sure that you eliminate hum problem.

It’s little bit pricy but I think for the money you won’t buy or build better power cable!

Please confirm somebody more experienced that I didn’t mix something up!

Vlad.

 

[el_matt0]

howabout confirming my question from above? do i want to run just 3 wires in my umbilical, and then split them into the 12 needed for my 4 b22 channels somehow once IN the b22 enclosure? or do i want to run all 12 from the s22 pcb, through the umbilical, to the b22 boards? the amb sites diagrams show running 3 through the umbilical and then splitting them into the needed # for each of the channels somehow...

 

[n_maher]

Quote:

Originally Posted by el_matt0 /img/forum/go_quote.gif ok well here, howabout this nate

How about this, one more

and I'll just ignore your questions altogether?

To answer your questions, if you wanted to wire each board with separate power then yes, you'd need an umbilical cord with 12 conductors and yes 18ga is the minimum recommended gage. I do not think you'll find a commercial cable so DIY is your only option if that's the way you choose to go and you're on your own finding connectors that'll accommodate that many wires. I'd suggest getting a paper copy of the Mouser catalog with your first order, it'll help you figure things like this out.

amb has discussed previously the benefits of separate vs. combined power supply wiring so I'm sure you've already read that multiple times so I won't restate the obvious. However, at some point the practicality of the wiring will get in the way of the predicted benefits.

There's a reason that he used the backplane boards.

 

[mb3k]

el_matt0, if you do go for the 3-conductor umbilical, check out the Belden 83803 cable.
If you use the backplane boards, you would need 2 of them which would reduce the max amount of wires to 6, but again you can use 3 for the umbilical and split it when its inside the Beta22 case.

 

[khbaur330162]

Maybe I haven't been around Head-Fi long enough, but I've honestly never seen anyone get walked through a DIY build to such an extreme extent as this before. Head-Fi is really a great community.

(Sorry if that was OT, but I really think it's great people are willing to help out as much as they are. el_matt0, you're very lucky.

)

 

[threEchelon]

Quote:

Originally Posted by khbaur330162 /img/forum/go_quote.gif Maybe I haven't been around Head-Fi long enough, but I've honestly never seen anyone get walked through a DIY build to such an extreme extent as this before. Head-Fi is really a great community. (Sorry if that was OT, but I really think it's great people are willing to help out as much as they are. el_matt0, you're very lucky. )

I can't even imagine what the troubleshooting will be like.

 

[el_matt0]

hopefully troubleshooting will be minimal...thats why im trying to make SURE of everything before doing, hence the questions. dont see why everyones such so hard-@#$ about it..i know i ask a LOT of questions, but honestly i have been doing a ton of reading up on it too, not like ive been GETTING all you guys to build my b22 for me

. i find it just very helpful all the loads of expertise out here in these forums, its a great way to fill in blanks etc..if its such an effort - dont reply? thanks to those of you who do