Broadcast Innovation

Radio Record, Volume II, Issue 32, 22 February 1929, Page 32

Broadcast Innovation

No Transmitting Valves A GERMAN firm, with their technical manager, and their engin eers, and using fundamental patents of numbers of eminent research workers, have now developed a transmitter solely employing generators instead of the expensive valves for broadcast wavelengths right down to 250 metres; and work is going ahead, I am told (states a writer in London "Popular

Wireless"), to adapt the new type Ot transmitter for the shortwave band down to 15 metres. The first of these transmitters has been installed in Munich, and will shortly take over full time work. The transmitter has had rather a bad time of it, and during one period the Munich listeners had the rather dubious honour of suffering from the new transmitter in its crudest experimental stages. This was as early as 1925 at the All German Traffic Dxhibition. Since then it has been completely redesigned and rebuilt, and is now even better than the existing type of valve transmitter quite apart from being much cheaper in operation, as there are no expensive valves to renew. I hear that a further transmitter of the same type will be erected in Leipzig during the coming year. When I viewed the new transmitter in Munich, the original inventors of all the more important improvements and alterations were there, and I got first-hand technical details, which I could not attempt to put down on paper-they were far too formidable. 4