On the advantages of high spark-frequency in wireless radio-telegraphy
Book details
- Title
- On the advantages of high spark-frequency in wireless radio-telegraphy
- Publication year listed
- 1908
- Format
- Public domain eBook
- Reading access
- Free online reader; no registration required
- Source record
- View on Archive.org
About this book
On the advantages of high spark-frequency in wireless radio-telegraphy
Year: 1908
Tissot has already pointed out the advantages of high spark-frequency when thermal detectors are employed. The author demonstrates that a high spark-frequency is also advantageous from the point of view of the telephone receiver. Rayleigh's and Wien's results are quoted as showing the rapid increase of sensitiveness with the frequency, and a curve of volt-sensitiveness is given for a pair of 800-ohm Schmidt-Wilckes head telephones of the type used for radio-telegraphic work. The change in sensitiveness is of the same general type, but there are indications of the diaphragm having a higher natural period than the old-type telephones referred to. The electrical data of the Schmidt-Wilckes receivers are as follows: Direct-current resistanc
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