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Author Topic: 4-Pin Mini XLR Pin Assignments......  (Read 4861 times)

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Offline F.O.Bean

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4-Pin Mini XLR Pin Assignments......
« on: December 12, 2007, 08:12:40 PM »
If anyone could help me out with this, that would be AWESOME :) FWIW, This is so Greatgumbino can wire up my MBHO Active Cables :)

TIA,
Bean
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
http://www.archive.org/bookmarks/Bean420
http://bt.etree.org/mytorrents.php
http://www.mediafire.com/folder/j9eu80jpuaubz/Recordings

stevetoney

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Re: 4-Pin Mini XLR Pin Assignments......
« Reply #1 on: December 12, 2007, 09:20:00 PM »
Guess my explanation on what I did was pretty confusing, huh?  Kinda hard to explain in words what I want to show you in person.
« Last Edit: December 12, 2007, 09:21:33 PM by tonedeaf »

Offline thegreatgumbino

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Re: 4-Pin Mini XLR Pin Assignments......
« Reply #2 on: December 12, 2007, 09:24:40 PM »
Looks like the ones you sent me are:

1 - white
2 - blue
3 - white
4 - blue
Casing - Shield

As long as these worked for you previously wired like this, I should be good to go.
It’s not what you look like when you’re doin’ what you’re doin’, it’s what your doin’ when you’re doin’ what you look like your doin’…express yourself. - Charles Wright

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Offline F.O.Bean

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Re: 4-Pin Mini XLR Pin Assignments......
« Reply #3 on: December 12, 2007, 09:33:52 PM »
Guess my explanation on what I did was pretty confusing, huh?  Kinda hard to explain in words what I want to show you in person.

so di I do this with phantom on? I know how to check for continuity, but how does that tell me what ones are a positive voltage, what ones are neutral and which ones are ground?

Matt, I think thats how Steve did them, yes!
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
http://www.archive.org/bookmarks/Bean420
http://bt.etree.org/mytorrents.php
http://www.mediafire.com/folder/j9eu80jpuaubz/Recordings

stevetoney

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Re: 4-Pin Mini XLR Pin Assignments......
« Reply #4 on: December 12, 2007, 10:52:55 PM »
Guess my explanation on what I did was pretty confusing, huh?  Kinda hard to explain in words what I want to show you in person.

so di I do this with phantom on? I know how to check for continuity, but how does that tell me what ones are a positive voltage, what ones are neutral and which ones are ground?

Matt, I think thats how Steve did them, yes!

No, I never connected anything up at all to phantom power or anything to determine what was positive, negative, or whatever.  Let's see if I can try one more time to explain what I did.

Again, all I did was mimic'ed the wiring of the stock set one wire at a time and jury rigged the new set that way.  So, using my continuity checker, I'd pick up the female end of the stock cable and stick an unraveled paper clip into one of the four holes of the female connector.  Then I contacted one of the leads of my continuity checker so that it was contacted the paper clip...so that there was electrical continuity between the paper clip and the hole that paper clip was stuck into.  Then with the other lead of the continuity checker, I checked each of the four posts on the opposite end of the strock cable...on the male end of the stock cable for continuity with the paper clip.  Obvioulsy, three of the four posts on the male end will not have electrical continuity with the paper clip...obviously one out of the four posts does have continuity because one of the four wires inside the cable is soldered between these two posts. 

Once I figured out which posts were connected to each other on the stock pair of cables, then I soldered the first wire of my new cables up the same way.  Once I had the first wire soldered up, it was on to wire two, where the process was repeated by selecting a different female post to stick the paper clip into. 

Keep soldering them up one wire at a time until of course you have four wires between four posts on each connector. 

This is how I did it.

Each of the four posts on the mini-XLR are numbered.  However, I doubt that you can open the connectors on the stock pair and see the number on the posts.  If by some chance you CAN see the posts, then you should be able to tell Matt which post on the male connector is connected with  which post on the female connector.  Just tell him the configuration by number...e.g. number 1 on the female connector is wired to post number 3 on the male connector.

If you can't do it that way, then you should be able to do it by configuration, because there is a distinct 'Y' shape configuration that should enable you to communicate with Matt which posts is which by simply establishing the configuration...say that the top of the Y is top and then from establishing that convention, you can tell him which post on the female end is connected to which post on the male end.

Of course, don't forget that the wire mesh of the cable shield is also connected.
« Last Edit: December 12, 2007, 11:05:47 PM by tonedeaf »

Offline F.O.Bean

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Re: 4-Pin Mini XLR Pin Assignments......
« Reply #5 on: December 12, 2007, 11:27:48 PM »
I forgot, I cant do that. I sent Matt the 4-pins from the cables you made Steve :(
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
http://www.archive.org/bookmarks/Bean420
http://bt.etree.org/mytorrents.php
http://www.mediafire.com/folder/j9eu80jpuaubz/Recordings

stevetoney

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Re: 4-Pin Mini XLR Pin Assignments......
« Reply #6 on: December 13, 2007, 06:18:27 AM »
I forgot, I cant do that. I sent Matt the 4-pins from the cables you made Steve :(

??????

Yes you can Bean.  All you need is the stock cable. 

Bean, I'm not communicating very well.  Please send me your stock cables and I'll get this done for you.

Steve Toney
518 Southfield Drive
Greensburg, PA 15601

You don't need the cables that I made.  All you need is the stock cables.  You simply need to figure out the pin assignments on the stock cables (pin 1 on the male side of your stock cables is connected to pin ?? on the female side of your stock cables) and communicate to Matt what that config is.  Matt should then copy that same pin assignment config. on your new cables by soldering them up the same way.

All of the above instructions are provided from the stock cable which of course is wired correctly since that's how they came from the factory.  The cable that I made up simply duplicates the wiring configuration in the stock cables.

Bean, I guess you've never reverse engineered anything or torn your car apart and put it back together again.  It's called reverse osmosis.  It's how, over history, the japanese have copied American technology.  In the case of an old car, I never used an instruction manual on how the parts go back together, I just remembered how I took it apart.  When I got done, if I had parts left over, I was in trouble!!!

What you do is start with the finished product and then work backwards by tearing the finished product apart piece by piece but, but each piece that you take off, you figure out what it is (e.g. a 0.1 ohm resistor connected to two points on a circuit board).  Every step of the process, you make detailed notes of what you take off, where it was connected, etc.  Eventually you get to the bare bones parts...the raw cirucuit board or whatever.  All along the way, you keep notes about how you tear the pieces off.  When you're finished, you put it back together in reverse to understand the design of the product you've reverse engineered. 

OK, its not simple to do for a TV or a computer, but for a pair of stock active cables with mini-XLRs on each end, you don't even have to tear anything apart.  You don't even need to pull the connector apart to do what I've instructed you to do above.

Steve
« Last Edit: December 13, 2007, 06:37:29 AM by tonedeaf »

Offline F.O.Bean

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Re: 4-Pin Mini XLR Pin Assignments......
« Reply #7 on: December 13, 2007, 06:49:50 AM »
I just dont know how a stock cable can tell me which leads are positive and which are negative ??? I understand what youre trying to tell me, but it doesnt hold any value because the cabling colors and everything are not the same ???
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
http://www.archive.org/bookmarks/Bean420
http://bt.etree.org/mytorrents.php
http://www.mediafire.com/folder/j9eu80jpuaubz/Recordings

Offline Nick's Picks

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Re: 4-Pin Mini XLR Pin Assignments......
« Reply #8 on: December 13, 2007, 08:33:39 AM »
it doesn't really matter.
as long as the same wire goes from pin X on one end to pin X on the other, its all good.
just be sure that the number of the pins (their assignment, 1,2,3,4) line up with 1,2,3,4 on the other end.  good to go.  it doesn't care what is hot and what is not.  as long as its carrying the signal to the appropriate pin, you're fine.l

to be totally sure, you will want a multi-meter so you can "ping" each pin and verify they line up.
use the continuity test setting (found on most meters).  test pin one on one end and pin one on the other.  if it goes "beep", then you know its the same wire.
rinse and repeat.

Offline F.O.Bean

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Re: 4-Pin Mini XLR Pin Assignments......
« Reply #9 on: December 13, 2007, 04:15:18 PM »
duh. DAMN. I swear, Im DUMBER not on drugs :P 8)

Gotcha. Matt, sending you a PM VERY shortly ;D
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
http://www.archive.org/bookmarks/Bean420
http://bt.etree.org/mytorrents.php
http://www.mediafire.com/folder/j9eu80jpuaubz/Recordings

Offline F.O.Bean

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Re: 4-Pin Mini XLR Pin Assignments......
« Reply #10 on: December 13, 2007, 04:21:36 PM »
whats sad is I went to skool 4 electronics :P Its been a few years tho :P
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
http://www.archive.org/bookmarks/Bean420
http://bt.etree.org/mytorrents.php
http://www.mediafire.com/folder/j9eu80jpuaubz/Recordings

Offline Nick's Picks

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Re: 4-Pin Mini XLR Pin Assignments......
« Reply #11 on: December 13, 2007, 07:52:29 PM »
whelll...., you can't spell "SCHOOL" w/out "CHOOL" , right ?
and you can't spell "chool" w/o BEAN.

stevetoney

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Re: 4-Pin Mini XLR Pin Assignments......
« Reply #12 on: December 13, 2007, 08:33:11 PM »
Beaner...I'm glad you got it.  I knew it was just a matter of the light bulb coming on there, bud.  I couldn't figure out any other way to try to tell you.  I was close to calling you today though cause I'd forgotten until this morning that you gave me your phone number.

Offline F.O.Bean

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Re: 4-Pin Mini XLR Pin Assignments......
« Reply #13 on: December 13, 2007, 08:43:21 PM »
whelll...., you can't spell "SCHOOL" w/out "CHOOL" , right ?
and you can't spell "chool" w/o BEAN.

ahh shucks, thanks Nick :kiss2:

Beaner...I'm glad you got it.  I knew it was just a matter of the light bulb coming on there, bud.  I couldn't figure out any other way to try to tell you.  I was close to calling you today though cause I'd forgotten until this morning that you gave me your phone number.

Yeah, I can be a real idiot sometimes :) Must be from all of the paint fumes Ive been around lately :P I tell you what, that oil-based polyurethane isnt no joke. that shit will give you a MIGRAINE if you dont have ventilation while applying it. And we wont even get into Oil-based epoxy poaints, and maybe even worse, alcohol-based primers/sanding sealers ;D I bet I def lose a good bit of brain cells everyday I go to work ;D
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
http://www.archive.org/bookmarks/Bean420
http://bt.etree.org/mytorrents.php
http://www.mediafire.com/folder/j9eu80jpuaubz/Recordings

 

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