Theory of determination of ultra-radio frequencies by standing waves on wires
Book details
- Title
- Theory of determination of ultra-radio frequencies by standing waves on wires
- Publication year listed
- 1924
- Format
- Public domain eBook
- Reading access
- Free online reader; no registration required
- Source record
- View on Archive.org
About this book
Theory of determination of ultra-radio frequencies by standing waves on wires
Year: 1924
In the parallel-wire system employed by the Bureau of Standards for frequency standardisation a valve generator is used for excitation, and a current-indicating instrument of low resistance is used as a bridge across the wires [see Abstract 1925B00309]. The present paper gives a complete mathematical treatment of the method; which is based on resonance conditions. The settings are therefore sharp, and it is possible to approach the theoretical accuracy in actual operation. The frequency /b f/ in kilocycles per second is calculated from a length /b l/ measured along the wires by means of the equation /b f/ = /b v/ /sub 0/ (1 - Delta )/2/b l/, where /b v/ /sub 0/ is the velocity of light and /b l/ is the distance in metres between