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podcast:ddop:public:episode_201902 [2019/08/01 05:21] (current)
mikewills created
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 +====== Episode 2019-02 - Radio Signals and Waves ======
 +Hello and welcome to the next edition of the Mike Wills Podcast! This is the Dog Days of Podcasting edition for August 2, 2019. I am KE0VYC and my name is Mike Wills. This season, we are covering amateur (or ham) radio.
  
 +===== Notes =====
 +  * Radio waves are non-ionizing radiation meaning you won't become the hulk by using radios. Radios transmit electromagnetic light waves. ​
 +  * They talk about the difference between Frequency (time to do one phase) and Phase (a measure of time within the signal). ​
 +  * Radio Spectrum - You'll notice a pattern here for ranges.
 +    * VLF (Very low frequency) 3 kHz - 30 kHz.
 +    * LF (Low Frequency) 30 kHz - 300 kHz.
 +    * MF (Medium Frequency) 300 kHz - 3 MHz - AM Radio falls into this range
 +    * HF (High Frequency) 3 MHz - 30 MHz
 +    * VHF (Very High Frequency) 30 MHz - 300 MHz - VHF TV and FM Radio falls into this range
 +    * UHF (Ultra High Frequency) 300 MHz - 3 GHz - UHF TV and Mobile Phones falls into this range. Anything over 1 GHz is considered microwaves
 +    * SHF (Super High Frequency) 3 GHz - 30 GHz
 +    * EHF (Extremely High Frequency) 30 GHz - 300 GHz
 +  * Then they start talking about how to calculate wavelength. This brings us to the first formula.
 +    * The speed of light is very close to 300 million meters per second
 +    * Radio waves travel at a constant speed of light
 +    * Thus you can calculate radio wavelengths into meters by the formula 300/​frequency in MHz.
 +    * With this formula, I was able to pass both the Technician and the General license tests.
 +  * What is a Transceiver?​
 +    * There are three basic elements of any amateur station. A transmitter,​ receiver, and an antenna.
 +    * Normally, you join the transmitter and receiver into one unit called a transceiver which is then connected to an antenna.
 +    * A repeater works much the same way except that it receives on one frequency and transmits on another at the same time.
 +    * The purpose of a repeater is to give the hight needed to make longer-range communications.
 +
 +===== Wrap Up =====
 +Thank you for listening. 73 from KE0VYC
 +
 +===== Contact Information =====
 +  * Twitter: https://​twitter.com/​mikewills
 +  * Facebook: https://​www.facebook.com/​mikewills
 +  * Email: <​[email protected]>​
 +  * Website: https://​mikewills.me
podcast/ddop/public/episode_201902.txt · Last modified: 2019/08/01 05:21 by mikewills