The D Layer and Ham Radio Propagation

Folks, in this video we discuss Ham Radio Propagation and specifically the D Layer's role in Skywave Propagation.

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[ferdinandwprjl]

Great coverage APE, clear and to the point. 73

[HOAHamRadio]

Ape, I love these videos. You take complex sciency stuff and explain it in a way that is not insulting to the “experts” or over the heads of the newbs. Fantastic video.

[pasjeihobby]

Holy cow. Easiest and most digestible way to pass ionosphere info I've seen. Thanks a lot!

[MarkPeeren]

Great video just one small thing, Penticton is pronounced pen tic ton. I've been to the radio observatory many times it's awesome. Penticton is also a great little vacation spot that has lakes with fantastic beaches on the north and south ends of town. In the winter there is access to some of the best skiing in the world. DE VA7DLC.

[mjw_geek]

I really enjoyed this video as a new general class amateur radio operator You really broke it down and made all the theory make a lot of sense so thank you very much!

[HamRadioDX]

Thanks for explaining all D layers for us Ape 👍 great art skills btw

[Ammed_KNSTX]

Great information, 73!!! Keep it coming!!!

[bill-kfcdk]

Enjoyed!! Even if I didn't understand it, I felt I did. 🎓 Thanks

[KBJJ]

Good video Ape I was just describing this stuff at work. Your video did a much better job explaining it. Great timing.

[nicthegr]

Thank you, good info on something I was having trouble with!!

[FEPLabsRadio]

I love ham radio potpourri. I'm ready for Jeopardy! Good job buddy!

[MickDownUnder]

Love the sarcasm. Hail hard rocking amigo 🤘

[darenmiller]

Awesome talk man. I appreciate not shitting on people like me that have no idea what any of this is. 👍

[rossjones]

Great content! Learned something today.

[MikeNMAK]

Was that a round Earth in the first slide? LOL. Thanks for another good video. Refreshers like these are always helpful. The videos are a good length that makes them easy to digest too.

[tittiger]

Yes with NVIS there is less D layer to go though BUT the MUF generally is also higher at lower transmission angles.
This is a confusing but real concept. Where you wish to go through the D layer but get refraction from the F layers.

The way I look at the D layer and the F layer have different MUFS for NVIS to work your frequency must be above the D layer MUF and lower than than the F layer MUF. Did i get it right? Does that make sense?

[Atomshamradio]

The darned layer i though the d layer absorbed the signals i rememberd it in my studies back then⚛

[tittiger]

The D layer forms in the day time because photons from the sun that are shorter and more energetic than the 100 nM photons that form the F layers are present. The D layer is formed from 10nM (approaching x-rays) that can make it that far though the atmosphere.

Technically the D layer does not have a MUF as it never refracts EMF.
Perhaps it would be more accurate to say that NVIS must be above the D layer LUF and below the F layers MUF.
You have given me a lot to chew on Ape. Thanks for the videos!

[tittiger]

Is not MUF the highest frequency returned at a verticle angle and that is goes up as you go from vertical to horizontal?

[scanner_]

How many watts does it take for this to work?