Directive radio transmission on a wave-length of 10 metres
Book details
- Title
- Directive radio transmission on a wave-length of 10 metres
- Publication year listed
- 1923
- Format
- Public domain eBook
- Reading access
- Free online reader; no registration required
- Source record
- View on Archive.org
About this book
Directive radio transmission on a wave-length of 10 metres
Year: 1923
Reference is made to Marconi's recent work on short wave-length transmission and the advantages of short waves for directive work. The authors have experimented on a 10-m. wave-length using at the transmitting end a parabolic cylindrical reflector. The apparatus is described in great detail, with dimensions to enable other investigators to continue the experiments. The transmitter was a 50-watt tube of the coated filament type, inductively coupled to a balanced aerial and counterpoise. This was placed at the focus of a grid parabolic reflector (see diagram), each wire of which was tuned to 10 metres. The focal distance was 1/4 of the wave-length. The radiative properties of this reflector are discussed in detail. The receiving apparatus was a 3-valve instrument coup
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