Please read the description first. A small talk video about the Q factor of (radio) coils, it is only an approach and a demo (…).
When you want to study this issue/subject in a serious way (the Q of coils & resonant circuits on their peak rsonances): study at first the relevant radio technology books, and after that, go to Google and/or the www.
These reliable Radio Tech books of the 1950’s-1980’s-1990’s will surely show you reliable calculations in this regard. And (sometimes) also the “how to make it in practice” of High Q coils or cavities. The latter is a big bonus, of course.
They can show you how to calculate the quality factor of a coil named “X”, with X windings, with a core of X inductance, made with a X diameter of material X with X spacings, etc.
Thus, there are surely calculations to approach this specific subject and questions: the quality of coil “X” for frequency “Y”. Please don't get lost here, in many old radio books of the 1940's-1960's you can find very reliable info about how to make a good Q coil for frequency band "X". Espacially (in Europe) in old Philips books/magazines. Surely for America there will also be reliable books in this regard.
www.worldradiohistory.com/ind...
Many books there.
Thus : I did not show Quality factor calculations of (radio) coils, by purpose. It could be a personal study into a deep dive into this subject. They go from (say) 30 KC up to XXX MC or even in the Gigahertz range.
They all have their specific quality factors, their best resonance on LW/MW/SW/VHF/UHF/SHF/ up into the (say) radioactive wave frequencies = micrometer or smaller waves.
To receive an (e.m.) signal on such an extremely high frequency band (or not, in a lower band). But that, in a certain way, goes beyond the things that I wanted to tell via this video.
On the other hand: study e.g. the development of the Magnetron, since the 1940’s-1960’s, when talking about resonance and peak resonance in the GigaHertz range. Say getting an enourmous energy out, via cavities, made in a specific physical way. Got to radar, etc.
Resonance and peak resonance and trying to get a transmitter or receiver to a high Q are (say) the most proper factors to make a wavetrain functional, could go from 1 Hertz into the microHertz waves, say from 1 Hertz E.M. to wavepipes for Radar, in the GigaHertz range.
The schematic of the test oscillator showed here in this video is • Long Wave Radio test o...
Many other radio oscillators (with which you can do the same demo) are on my YT Channel
My You Tube channel trailer is here: • Radiofun232 on RU-vid...
Type there the keywords that you like (e.g. radio/audio/amplifiers/test/filter/) in the “looking glass” = search function” and give “enter”. Via that you can find specific video’s (under the say 1500 published).
When you search, search always “NEWEST FIRST” to get the right overview.
You can also search via the “looking glass” on my Channel trailer via keywords like ”audio”, “radio”, “amplifier”, “filter”, “Shortwave”, “transistor”, “FET”, “oscillator”, “generator”, “switch”, “schmitt trigger” etc; so the electronic subject you are interested in.
My books about electronics & analog radio technology are available via the website of "LULU”, search for author “Ko Tilman” there. www.lulu.com/search?adult_aud...
I keep all my YT videos constant actual, so the original video’s with the most recent information are always on RU-vid. Search there, and avoid my circuits that are republished, re-arranged, re-edited on other websites, giving not probable re-wiring, etc. Some persons try to find gold via my circuits. I take distance from all these fake claims. Upload 26 June 2024.
24 июн 2024
