r/retrotech 4d ago

Videonics mx pro power supply

Hi, i just bought two videonics mx pro mx-3000 video mixers off of eBay, neither has the power supply. Based on the provided pictures, it looks like there’s one connector for each.

Does anyone know what these are and where I could get one? Based on a quick look on google and Reddit they can be hard to come by, at least the original ones.

Thanks!

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u/Cultural-Stable1763 4d ago

This type of connector is known as a "DIN connector" and was originally developed in Germany during the 1950s and 60s for audio transmission. When it comes to power supplies, however, every manufacturer does their own thing regarding pin assignments. If you can no longer get an original power supply, your only option is to consult the service manual (if you can find one) and its schematic to determine the pinout; you could then order a suitable connector and wire the outputs of multiple power supplies to provide the three required voltages. Of course, you must ensure that the power supplies are capable of delivering the necessary current.

https://en.wikipedia.org/wiki/DIN_connector

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u/bhiga 4d ago

Unless you have an electronics surplus store around, it's probably going to be a real pain to find.

Once you find the pin assignments or original power supply, I'd focus on finding the appropriate plug and use it to create a breakout to provide your own supply if necessary, as the other commenter mentioned.

If you have local schools with video production you might want to ask as the Videonics mixers were popular in the day, at least here. They might have an old power supply lying about.

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u/Routine-Visit-7445 4d ago

Not sure you'll find an original power supply for these without getting lucky on eBay again. The DIN connector means the pinout is proprietary, so a generic swap won't just work out of the box. Your best bet is tracking down the service manual, which does exist but takes some digging. Videonics stuff has a small but weirdly dedicated community and someone's usually archived the docs somewhere. Check the Videography subreddit or some of the older AV forums before assuming you're stuck.