XLR pinouts... Delta cart machines...

[SFM-Ptgal]

(Gnd) (-2) (+3)
http://www.johndyer.com/ITCDeltaB.jpg
Never noticed that on my cart machines...fortunately ;D

 

[Chuck]

(Gnd) (-2) (+3)
http://www.johndyer.com/ITCDeltaB.jpg
Never noticed that on my cart machines...fortunately ;D

Pin 3 hot was pretty common for a long time. As long as the circuit is balanced, and you are consistant, with everything wired exactly the same, it won't cause any problem.

 

[TomT]

The pin 3 or pin 2 hot issue reflects past European practices to create trade barriers to American imports--without ever officially creating trade barriers. Like the practice of making light bulbs with different threads before the advent of EU standardization. Or "SECAM"--known to the TV folks as System Exactly Contrary to the Americans. (Can't say this with PAL, which is a much better analog system, except for that screwy 50 hz. scan rate. Academic now in the digital era.)

Pin 3 has been the "hot" "Hi" or "+" input and output on most American recording equipment--going back to the early Ampex tape decks. Of course, didn't really matter since most of this equipment was transformer balanced in and out.

The change to "pin 2 hot" came with the vote of some audio standards body populated by mostly European and Japanese members a number of years ago. Absolutely no point to change except to be different.

Even with the Delta's, which use differential balanced op amps on the output, really does not make much difference as long as you connect both channels in the same way.

Only time this has been a problem is in some PA installations, where the mike inputs are unbalanced.