| Elektorskop, Teil 5 (Oszilloskop)
| Motorrad-Transistorzündung (mit BD 140)
| Optischer Schlüssel (Elektronisches Schloss mit 4528)
| Automatic Call Generator (Amateurfunk, QSO, Morsecode)
| This `TAP-power` circuit has been specially designed for the TAP preamp system. It includes touch-controlled switches for turning the...