Finding tip and ground of a Jack

[kurtlives]

How would I find out whicj lug is the tip and ground on my jacks?

These are the ones in question
http://www.smallbearelec.com/Detail.bok?no=90
http://www.smallbearelec.com/Detail.bok?no=132


Thanks

[mdh]

The easiest way is to use the continuity tester (aka "beep mode") of your DMM (digital multi-meter, you do have one, right?) to find out which lug is ground -- touch one probe to the mounting flange of the jack, and the other to each of the solder contacts in succession.  When it beeps, you've found the ground lug.  The other one goes to the tip.

[kurtlives]

Continuity tester mode?

[the_random_hero]

Most multimeters have a diode testing fuction which doubles as a continuity tester.

[kurtlives]

What does mounting flange mean? Nut?

[R.G.]

(1) learn to use the resistance ranges of a meter to do continuity testing; you'll need this a lot later
(2) stick the end of a guitar cord into the jack; use your meter to test for continuity between the tip of the other end of the guitar cord and all of the lugs. The one which has continuity is the tip lug. Likewise, test for continuity between the far end of the cord's ground and any of the lugs. The one what show continuity is the ground.