hei, I'm creating a PSU for old Nagra reel-to-reel recorder model IS. I don't have schematics for my nagra so I'm trying to make sense of the universal binder connector on the side of machine.
https://photos.app.goo.gl/yGL3xEOsuvL6JosE2
I found some good advices from an older thread in this forum https://groupdiy.com/index.php?topic=47661.msg602273#msg602273 by user PRR but the wiring of IS looks somewhat different from 4.2. Based on what I see on box, I wold guess it uses negative Ground on pin 3. The binder connectors are labelled as:
1 SPEED CORRECTION
2 +6G
3 - (ground sign)
4 BATT. +
5 PILOT OUT
6 LINE INPUT
7
I'm not sure exactly about the positive pin but I would guess it's the pin 4 with BATT + sign. Can anybody confirm this? Battery uses 12V DC so I would assume the same for the PSU. Would this be correct assumption? Thanks for the help.
https://photos.app.goo.gl/yGL3xEOsuvL6JosE2
I found some good advices from an older thread in this forum https://groupdiy.com/index.php?topic=47661.msg602273#msg602273 by user PRR but the wiring of IS looks somewhat different from 4.2. Based on what I see on box, I wold guess it uses negative Ground on pin 3. The binder connectors are labelled as:
1 SPEED CORRECTION
2 +6G
3 - (ground sign)
4 BATT. +
5 PILOT OUT
6 LINE INPUT
7
I'm not sure exactly about the positive pin but I would guess it's the pin 4 with BATT + sign. Can anybody confirm this? Battery uses 12V DC so I would assume the same for the PSU. Would this be correct assumption? Thanks for the help.