Question on Stereo Neutrik Jacks

Parts Questions
1

I learned of Neutrik audio jacks on the SID-NUXX site.  The jacks have 6 pins whereas the SID PCB only has + and a - jumpers.  It is a stereo jack but not sure why there are 6 pins instead of 4. 

Anyway, for now I just want to go mono and maybe deal with stereo later.  So in absence of information, I thought I would use logic (uh - make that “noob logic”).

What I was thinking of doing is running a regular 1/4 inch mono cable out of a Roland into the jack.  Play Twinkle, Twinkle Little Star via Ye Olde Sequencer or something.  Then I would test the pins with a multimeter to see which is testing positive and negative for the Twinkle signal.  After that, when wiring the Neutrik to the board, I would wire the *positive* pin to the negative jumper on the PCB and the negative pin to the positive jumper on the PCB.  The reason being is that when testing with the Roland, I would be sending audio *into* the jack, whereas when the jack is connected to the PCB, I would send the SID’s audio out of the jack (requiring a reversal of roles).

Does this sound right to anyone - or am I cruising for an oozing (of SID components)?

I looked at the datasheet (below).  However, there is no positive and negative listing of pins on here so it was not informative.  I also searched the forum for Neutrik to no avail…

http://www.neutrik.com/content/products/detail.aspx?id=210_980737404&catId=CatMSDE_audio/

Thanks!

2

The pinnig of the NYS jack is:

(topview)

|- -| +
|- -| -
|- -| G
 (O)

Thats the normal pinning for a symetric signal. If it is used as a Stereo Out (like in the SID), + and - are the two channels.

The three pins on the opposite side are "switched contacts. They are closed if no jack is inserted and they are opened if you insert a jack into it.

So if you put a mono cable in the jack you have a  short between G and - . (In fact you are shorting one SID in your case, which makes this sid useless …)

greets

Doc

3

Awesome - thanks so much!!! ;D ;D ;D