01:47

Ruth Deutschmann

Benjamin Epp

Innsbruck

2008-08-21

1953

But the most important thing here with this device was really the idea, how do you make something wearable. And acceptable means, so you had to be independent from the mains. As there have been no electricity in the area. How do you get that done then? Yes. Yes, yes, that was been with batteries. With accumulators. - That we have made, but - - Motorcycle Batteries. Yes. There have been at that time that the anode voltage for the batteries - it took 90 volts. The one has got to buy. Have you had the separately here? Yes, this has all been sold separately. It has not made the 6 volts or 12 volts - not 90 can of course do. .. Yes, but you could make the heating of the tubes? .. They had batteries, which have so shone like lamps in tubes. And this one has used an anode voltage, which was 90 volts or 120 .. - .. Then four small tubes had been, that have been heated, even with the battery power. And what was the battery? Steel tubes were the .. at that time. That was the last development. Did the transportation endured? If you carry the can in the device? Yeah, because they were small, yes. But .. when the device has moved in the reception - so there must be a vibration for a grant. Has not made any disturbances? No. No? No. They are in the metal sleeve was inside. They were even magnetic. Yes, because even from the war, were these tubes, yes. Since I have not had any problems.