By Blackburn J. F.
The super study and improvement attempt that went into the improvement of radar and similar options in the course of international warfare II resulted not just in hundreds of thousands of radar units for army (and a few for attainable peacetime) use but in addition in a good physique of data and new innovations within the electronics and high-frequency fields. simply because thisbasic fabric could be of serious worth to technological know-how and engineering, it appeared most vital to put up it once defense accredited.
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Extra info for Components Handbook
Connector. 308 in. 25. Both the impedance and the delay could be improved by l/~ if the effective dielectric constant were reduced, for example by insertion of a helical spacer. The impedance and the delay, ascomputedfrom Eqs. 25, are plotted in Fig. 9 and Fig. lOasfunctions of thecorediameterc. Three curves are presented 1300/ 12001100 / gE 1000 c G ~ 900— gE X800 g / 500 ●31 F . 110in. —Cableimpedancevs. corediameter. 1 in each case. They are computed for coiled inner conductors close-wound with three different wire gauges.
3. 6. The Conductor. Stranded Copper. dtranded tinned copper wire is used for cable types RG-1 l/U and its modifications, RG-12/U and RG-13/U. Seven strands of No. 26 AWG with a nominal strand 1Joint &my-Navy SpecificationJAN-C-17A, July 25, 1946, Cables, Coaxial and Twin-Conductor, for Radio Frequency. (Army No. 71-4920A; Navy No. 16C8C,) See alsa the Shmdard CornponenLs Lint of the Army-Navy Electronics Standards Agency, Red Bank, N. J. 9ild cables ArmyNavy Wpe number Inner cmductor I INomi-1 ~ie,w.
5/U; (f) (d) RG-6/U; b) (e) RG-13/U; RG-12/u; (g) RG-9/u. attained an excellence and simplicity to be found in few, if any, other radio components. 1 The cables to be discussed consist of 1. 475 in. over-all diameter, with single and double shielding braids. 2. , with single and double shielding braids. 3. A high-impedance cable having a characteristic impedance of 950 ohms, intended for video applications. 11. A number of standard cables are illustrated in Fig. 3. 6. The Conductor. Stranded Copper.