Ham Radio:
1- Just in case you are interested; Ham radio will help you on your STEM, and the following MB’s: Radio, Electricity, Electronics, Astronomy, Space Exploration, Communication, and Engineering…
2- We talked about the speed of light in a vacuum C= 300 M Meters / Sec. I am going to use the term “RF” instead of Radio Frequency. (wrap your head around this) Light is a sub-set of RF. VERY, VERY high-frequency RF.
3- Everything in Ham Radio is METRIC – with 1 exception. Antenna Length is measured in English / Imperial units — i.e. Inches & feet & yards.
SI multiples
| Submultiples | Multiples | ||||
|---|---|---|---|---|---|
| Value | SI symbol | Name | Value | SI symbol | Name |
| 10−1 Hz | dHz | decihertz | 101 Hz | daHz | decahertz |
| 10−2 Hz | cHz | centihertz | 102 Hz | hHz | hectohertz |
| 10−3 Hz | mHz | millihertz | 103 Hz | kHz | kilohertz |
| 10−6 Hz | µHz | microhertz | 106 Hz | MHz | megahertz |
| 10−9 Hz | nHz | nanohertz | 109 Hz | GHz | gigahertz |
| 10−12 Hz | pHz | picohertz | 1012 Hz | THz | terahertz |
| 10−15 Hz | fHz | femtohertz | 1015 Hz | PHz | petahertz |
| 10−18 Hz | aHz | attohertz | 1018 Hz | EHz | exahertz |
| 10−21 Hz | zHz | zeptohertz | 1021 Hz | ZHz | zettahertz |
| 10−24 Hz | yHz | yoctohertz | 1024 Hz | YHz | yottahertz |
| Common prefixed units are in boldface. |
Don’t get to wrapped around this – Ham Radio uses kHz & Mhz and almost none of the rest. (Thanks to Wikipedia)
4- (big equation – useful equation) C= Frequency * Wavelength. C= 300 M Meters/sec This is always constant in Ham Radio. 300 M Meters / sec. = Frequency * Wave Length
5- The term HERTZ (Hz) means Cycles per Second. (named after Heinrich Rudolf Hertz who proved electromagnetic radiation existed between 1886 & 1889 – neat guy – read about his experiments)
Let us take FM Broadcast Radio example: The radio station on your FM Dial is 92.3. 92.3 means 92.3 Mega Hertz. or 92.3 MHz.
Conversely TV Ch 8 (FOX 8) broadcasts at 572 MHz. “Channel 8” has no relation to the frequency that it broadcasts on. The numbers on the AM dial stand for kHz. (FYI)
6- C= Frequency * Wavelength. Frequency measured in Hz. And Wavelength measured in Meters.
A- My grades are underwater.
B- Underwater – what do you mean?
A- Below C level.
More later,
Gaither
C- Where did the Chinese get the materials to build the Great Wall of China?
D- Wal-Mart of course.
Dare to Soar by Thomas Mercaldo