Military HF Radio - Episode 1 - RF Theory

A brief overview of RF Theory as it pertains to HF radio communications.

Agenda:
FCC Amateur Radio Licensure
Army Doctrine and Training Overview
Radio Communications
Wave Propagation
Propagation Paths
Solar Activity Effects on Communications

Hosted by: Matthew Sherburne, KF4WZB
Assistance by: David Fiedler, WB2CDG

[logicreason]

The little piece of paper got me out of the meet grinder in Vietnam. Spent 8 months in the MARS system.

[DSH]

A great series and a must for any military rad op to brush up on their skills after years of using only VHF and Satcom. Thanks!

[grinch]

There was a TTP from ALSA that started in 2002 called HF-ALE. I think the material they produced got integrated into the tactical radios. Anyways I wrote to ALSA in 2001 when the main radio of the last 20 plus years was debuting. They took up the idea and invited me to their working group and then the corporation would not let me attend the working group. I was a newbee at work but I had 23 years HF experience in HF to include guarding the Fort Jackson MARS station in 1976 and included finding my first HF-ALE radios in 1994 as immediately knowing this was the holy grail. This series is the best I've seen.

[russg]

Bro, I’m gonna teach this course to my 25Us. Thank you brotha

[robertjohnk]

I very much look forward to the remaining episodes of your lectures on military radio. Excellent lectures and very informative. Thanks for your good work!

[smash]

Excellent theory presentation and kudos for nailing down what the 300 is in the wavelength / frequency math. I never realized it was the speed of light represented.

[northbetrue]

Pro job! Thanks so much for your creativity, hard work and perseverance. You are a great professor indeed. 73 from KC1ANR

[yungerallenelectricalcontr]

This was well made and I'm a new subscriber due to the quality of this video .

[h.sapienstechnologicus]

In my experience wavelength formula is 𝛌 = 285 : FQ
-Don’t ask why, it just works- It counts in Cu wire velocity factor of 0.95.

[ryanragsdale]

Good video I was wondering how the weather would affect radio waves in the artic circle

[tyroncalta]

Matt, I am so excited for this series. I have watched another video with one of your mil/ham radio presentations many times. Also, it is great to see Dr. Fiedler named as well. He is the king of the resurgence of .mil HF (including tons of NVIS data). Have you worked any of the ham digital voice modes (like Codec2) or weak signal data modes (like JS8CALL)? Keep up the great work!

[ronalddaub]

Also have a 1950s weather balloon high frequency radiosonde Radio

[tomncj]

Typo, VG 38. "1 Year" should be "11"

[ronalddaub]

Have a military Crystal calibrator I'm assuming tube hybrid, coming that goes from 26 megahertz almost to 28 megahertz it looks like it's a little bit of shortwave and medium band that's HF trying to figure out how to use this thing

[ggNotSuree]

Not sure if you will respond to this. but I am slightly confused by one of your statements. When you talk about absporption fadiing.. you mention that during the morning, the D layer has increased absoprtion as it builds up it's ionization. Then you say solar flares can cause excess ionization in the D layer causing more absorption... But wouldn't this cause refraction and not absorption? I thought the greater the ionization, the greater it would be charged, and so would cause refraction? I am confused, and can't find anything online that helps me out