The Ausbausystem 3 demonstration sized model was made during the Lectron-MW era as a prototype and was never productized.

The Ausbausystem 3 was originally introduced in about 1969 during the Braun Era (1967 – 1972). There was also an Ausbausytem 3 S version produced by Braun.

My research colleague Mr. Günther Stabe and I found these blocks in an unlabeled box located in the Lectron-RWO warehouse during my June 2014 trip. Most of them were made for the Ausbausystem 3 demo prototype but several demo blocks belonging to the Ausbausystem 2 model were also in the box. For example, the high voltage transformer and the zener diode. The relay was used in both Ausbausystem models.

This prototype model is unique primarily because in many block instances, normal size demonstration sized casings were glued together to make ‘super sized’ demonstration blocks. Some examples are shown below.

The pulse shaper block showing 4 demo size blocks glued together next to a normal size demo block which in turn is next to the original size block.

Another difference was that an integrated circuit was used for the normal size demo pulse shaper block instead of discrete analog components as featured in the original block.

The relay block – demo and original size:

The flip flop block – demo and original size:

The high voltage transformer – demo and original size:

The NOT functional block – demo and original size:

The zener diode – demo and original size:

The AND functional block – demo and original size:

The tuner block – demo and original size: