Amateur Extra Lesson 4.2 Part 2: Reactance




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Victor Mandala: When graphing sine or cosine waves in trig y axis is amplitude and x axis is degree/radian. so as with a unit circle sine and cosine vary. So if one found the angle of a wave at amplitude "a" and the angle of a similar wave at amplitude "a". If you were to find the difference (subtract) between the two angles, that difference would be the phase angle. WAIT.... Phase angle is equal to Phase shift. Right?

Ohmeko Ocampo: @24:45 That 2 amp source is an AC source correct so you are taking the maximum of the current sine wave when you multiply it by the 75 ohm resistor to get real power?

Ohmeko Ocampo: I wish I had you as my electrical engineering professor. :/

Rex Parker: good contact Mobil ant works great

Craig Szwed: I think you mean that reactance is not an inherent quality of inductors and capacitors: you used the word inherit instead of inherent.

SechoDB: Great content. And although I'm glad you used arrows to point out the waves, I wished you didn't use the Green/Red color scheme. Color blind people will not be able to tell the difference. (myself included) :) Thanks regardless.

Monte Holder: You are presenting exactly what I have been struggling with. I should have watched all these before I started taking the practice tests.  Thank you.
ke0btb

dale myers: i'm understanding the idea of the subject. something i hadn't before. but as for the process, i'm lost. i'm in need of an 1 on 1 elmer.

Kzummo: Is the electrical movement of the electricity here being shown in waves because the examples all are using alternating current, or is it because we are assuming that the movement is a wave, or even because it is a particle, and a wave?

Ken Kendall: I could be totally wrong here but I don't think anyone invented electricity :)
Thanks for the videos --KD7YCX

Michael Reiman: Excellent..!!    Thank you so much.    Michael Reiman, KC4SKL, Palm Beach, Florida.

JL Software: Dave, regarding RF chokes - every article says to install them. An inductor passes DC but attenuates AC, right? Why would you want to attenuate AC from your transmitter to your antenna? Isn't your RF signal AC? I've read on this but still don't get how this helps. Can you include in a later video or reply here? Thanks 

Worldwide Bushcraft & Survival: Took my Technician test today.  You have been a big help.  Thank you.

Jeff Robertson: Very good tutorials! Reminds me of Stan Livingston, a former TV Chief Engineer that taught for Panasonic's Industrial video line.

Craig Mullins: It would be cool to make a video on how to fix an antenna when one of those types of loads is not in balance. Post a picture of an antenna's analyzer numbers it's getting from an antenna and how to fix the antenna so it resonates at peak efficiency...

Shaun: Thank you for all your efforts Dave. I am so happy to have found your channel.  I am finally proceeding with my boyhood passion of radio and physics/electronics. Studying for my HAM license and you Sir are a guiding light. ty
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Victor Mandala: When graphing sine or cosine waves in trig y axis is amplitude and x axis is degree/radian. so as with a unit circle sine and cosine vary. So if one found the angle of a wave at amplitude "a" and the angle of a similar wave at amplitude "a". If you were to find the difference (subtract) between the two angles, that difference would be the phase angle. WAIT.... Phase angle is equal to Phase shift. Right?
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Tex Templeman: you could have used pistons with the translucent studs on top to make it look like the water was splashing
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Amateur Extra Lesson 4.2 Part 2: Reactance