hey i have a 1982 12 channel mixer hunting for a 12 channel snake with a db25 pin on the end to connect to the back of the mixer. but.... where can i find one
If it's what I think it is, it is called a D-sub connector, you can buy them for quite a few audio places. However a D-sub usually only has 8 balanced connectors, if your mixer has 12 channels running through it there could be 12 unbalanced channels on the mixer so you will have to buy a plug and cable and make your own.
Here is a link to the tascam d-sub wiring which a lot of manufactures use. Link
I think what witzendoz is saying (and the diagram) he linked shows is..that, 1-D-sub connector, can only support 8 balanced jacks, with the 13th pin not used.
So for your application, you would need two D-subs. One with 8 connectors, and 1 with 4. Curious, What does the 25 pin connect to?
DB25 has 25 pins so it's possible: (12 channels x 2 conductors) + 1 ground = 25 pins. Tascam uses the DB25 for 8 channels but with individual shield connection for each channel.
DB25 is different from the D-sub which can have different pin counts and layouts. DE9 has 9 pins on two rows and DE15 (used for SVGA) has 15 pins in three rows.