DerNannonono- What's this?

Here's a picture of three things that can be fitted to MZ motorcycles:






The thing in the middle is the standard ETZ rectifier like what I use.

It has three connections for the AC phase wires from the alternator (the 3 in the middle), a D- which is just a ground, a D+ which is the full rectified DC output, and a 61 which is a bit of a mystery to me but it puts out slightly less power than the D+ so I use it to charge the field coils in my alternator.

Using only two of the phase wires from the alternator this puts out around 11-15v DC straight from the D+ terminal so I just connect that to the battery and have no need for a voltage regulator. I just have a zener diode connected to the battery box if it happens to overcharge, which on this setup only happens at high revs so it is hardly ever needed.






I found THIS strange one in my lockup. I know it came off of a later model MZ, possibly one of those Kanuni ones, but I don't know anything about it.


I see the three connectors for the alternator wires, and it had the standard D- and D+ like the regular type, but it's also got the 61 connection and and an extra DF on the strange circuit board.

What does it do? Does the DF mean this has a built in regulator?

I've been looking for information about this and can't find anything at all. It's possible that it was only from the time they made the Kanuni MZ in Turkey or somewhere (fake MZ's), or possibly something designed for upgrading old Wartburg or Trabant charging systems or something.

On the back is has "Fahrzeug-Elektrik, Elektronik GmbH, Made in Germany"

Do you have any secret MZ knowledge as to what it is and what it does?

















I already know what this is and what it does.