![Éléments de la téléphonie radio . nber de fines coperfils isolés tressés ensemble, communément appelé htzendraht.ce type de fil a une résistance beaucoup plus faible à de hautes fré-quences que le Éléments de la téléphonie radio . nber de fines coperfils isolés tressés ensemble, communément appelé htzendraht.ce type de fil a une résistance beaucoup plus faible à de hautes fré-quences que le](https://c8.alamy.com/compfr/2crmxdm/elements-de-la-telephonie-radio-nber-de-fines-coperfils-isoles-tresses-ensemble-communement-appele-htzendraht-ce-type-de-fil-a-une-resistance-beaucoup-plus-faible-a-de-hautes-fre-quences-que-le-fil-solide-le-noyau-en-fer-est-en-fer-special-a-haute-frequence-et-isole-sans-souci-l-action-de-ce-type-de-modulateur-est-difficile-a-expliquer-sans-recours-a-des-mathematiques-plutot-avancees-brieflythe-l-action-depend-de-l-effet-que-la-variation-de-la-magneticsaturation-a-sur-le-modulateur-lorsque-le-courant-direct-du-microphone-est-grand-le-fer-se-rapproche-c-est-a-dire-qu-il-ne-restera-que-smghtly-2crmxdm.jpg)
Éléments de la téléphonie radio . nber de fines coperfils isolés tressés ensemble, communément appelé htzendraht.ce type de fil a une résistance beaucoup plus faible à de hautes fré-quences que le
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![The principles underlying radio communication . ps in short range work is shown in Fig. 293. Thegenerating system, to the right of the points marked 0+ and&—, may be described as The principles underlying radio communication . ps in short range work is shown in Fig. 293. Thegenerating system, to the right of the points marked 0+ and&—, may be described as](https://c8.alamy.com/comp/2CRM09P/the-principles-underlying-radio-communication-ps-in-short-range-work-is-shown-in-fig-293-thegenerating-system-to-the-right-of-the-points-marked-0-and-may-be-described-as-a-system-having-the-oscillating-circuitdirect-coupled-in-parallel-with-the-oscillator-tube-both-beingfed-through-the-radio-frequency-choke-coil-lu-the-feed-back5390422-34-528-kuctron-tubes-to-the-grid-of-the-oscillator-tube-is-by-capacity-coupling-acondenser-c-serves-to-transmit-the-ac-variation-of-voltageacross-c-to-the-grid-without-having-the-grid-metallicallyconnected-to-the-plate-the-radio-frequency-c-2CRM09P.jpg)
The principles underlying radio communication . ps in short range work is shown in Fig. 293. Thegenerating system, to the right of the points marked 0+ and&—, may be described as
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Radio Wave Propagation. VLF ( 3 – 30 KHz) and LF (30 – 300 KHz) Propagation Marc C. Tarplee, Ph.D. ARRL Technical Coordinator SC Section. - ppt download
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