bw it isn't "Old stuff" !

I bought my new Multiplex Profi Modul transmitter because the original encoder system of my earlier digital proportional system couldn't be extended with mixers.
Sinds I use the Multiplex, the transmitter is frequently updated with my own custom build mixers which I also needed to fly experimemtal airplanes,
These type of mixers still aren't available for "modern" computer radio's and one of these I use for rudder control instead of differential linking of the ailerons.

On the photograph the Robbe Mäxi, equiped with electrical retracts with screw spindle, 1970? , but...... separate battery for the electrical retracts.
in this plane a receiver battery of 500 mAh 4.8 VDC was enough to fly pattern.
The transmitter is the same as I showed in the other post, the retract switch is on the left side below the stick.

Taurus Flyer