I have the MFJ-564B iambic paddle which I need to wire to the MFJ-552 CW interface. The paddle is stereo (dits/dahs) and the interface is mono (when connected to paddle, only gives DITS). How can I make a connector for it without rewiring my paddle? The paddle works perfectly with my other radios.
As I read the MFJ-522 manual, it appears that you will need a keyer between your paddle and the 522.
Your paddle is essentially two switches, and a keyer is an electronic box (MFJ-401D, for example) that makes dots when you close one switch, and dashes when you close the other. The output of the keyer is a single switch contact that could be used to replace a manual key. If your other radios can use the paddle directly, they must have built-in keyers.
(This is a very strange use of mono/stereo terminology.)