Morning Rick we do appreciate all that you do to help us to become more knowledgeable in radio electronic Thanks very much
@saturn5tony
12 жыл бұрын
Any absolutely perfect explanation of an RF coil / resistor comparison I EVER HEARD!! In 6 minutes I got an example of something I knew, but to actually see, was an excellant way! Good job Rick. When I got my degree in electronics, I would have gradualted in a few months rather than years if YOU were teaching!!!!
@MrSuperheterodyne
12 жыл бұрын
Fantastic video. Very very nice teaching method you have, and nice clear explanations. I am grateful for these videos! Thanks!!!!
@skycarl
12 жыл бұрын
Another great look at the inside workings of a circuit. Chokes can be those mysterious components that work but can make you ask why. Thanks for another fun education video. 73
@bisbeejim
9 жыл бұрын
Thanks for the video. I've wondered all my life what a choke coil actually did.
@Pwaak
12 жыл бұрын
It's a real joy watching and learning from your video's! Thank You!
@kuizatz
Жыл бұрын
Excellent, thanks so much.
@AllAmericanFiveRadio
Жыл бұрын
Thank you, and your welcome.
@cyberlightbeing
12 жыл бұрын
The way you explain stuff is simply brilliant!
@GroverCricketDaisy
2 ай бұрын
Hi Rick my question is regarding the choke coil. Does the coil stop the FR passing through it due to the magnetic field that it sets up and only allowing DC through? Thanks Bill
@AllAmericanFiveRadio
2 ай бұрын
Hey Bill, it is the Moving magnetic field that produces impedance. Here are two videos that mat help. Impedance, Back EMF, AC Resistance kzitem.info/news/bejne/2mdnuZajkYKKZG0 Impedance Back EMF Practical Demonstration kzitem.info/news/bejne/q6h_nX1vbIqrjKA
@MyTube4Utoo
4 жыл бұрын
Interesting. Thank you for the video.
@AllAmericanFiveRadio
4 жыл бұрын
Thanks
@joernone
12 жыл бұрын
Rick, Fantastic. This info is vital to one of my own future vids. But you're about four years overdue. :-) Thanks, my friend. Regards, John
@billwilliams6338
4 жыл бұрын
ALLAMERICANFIVERADIO, Why is a CHOKE frequency dependant for what reasons? Is the Chokes storing current like a reservoir like the filter capacitors or is the Choke doing something else to the AC ripple, not sure if the Choke is regulating the current?
@AllAmericanFiveRadio
4 жыл бұрын
Yes the choke/coil does store energy. Here are some videos that may help. Oscillators, the Basic Tank Circuit 1 kzitem.info/news/bejne/x4dq34aMfqyJhHY LC Resonance Testing Demo kzitem.info/news/bejne/mWqN06KihJmFmJw LC Resonance Oscilloscope Demo kzitem.info/news/bejne/qJWIqa16naZjpYI PI filter, Resistor Choke Oscilloscope Demo kzitem.info/news/bejne/uLCtx3yFb4mBdqA Capacitors, DC and AC Current kzitem.info/news/bejne/r3-k2mWJrGWnhGk
@AllAmericanFiveRadio
12 жыл бұрын
On the trainer there will be no signal because it is ground, all though your right there is a small amount of RF being shorted out. There will be a little RF getting into the power supply of the transmitter and I would like to show it, but I gave the AM Transmitter to SpeakerFreak95. And most of the RF will be shorted out though the filter cap. Its interesting that 150pf cap across the filter cap works better to short out the RF.
@rothschadel
12 жыл бұрын
great vid. could you add a segment showing the oscilloscope hooked up on the other side of the coil also. It should show little RF, correct?
@Phenyl82
12 жыл бұрын
Thanks for this videos. Always learning from you. I appreciate it,
@ericalbert6954
4 жыл бұрын
Merci beaucoup !
@AllAmericanFiveRadio
4 жыл бұрын
Your Welcome!
@GroverCricketDaisy
2 ай бұрын
Thats amazing how that works
@AllAmericanFiveRadio
2 ай бұрын
It is still fascinating!
@vibra64
12 жыл бұрын
Another great video on electronics theory. Thanks!!!!
@multi-talented7986
4 жыл бұрын
What if I apply 1mega Ohm resistance instead of 50Ohm? Will the RF signal still short to ground?
@AllAmericanFiveRadio
4 жыл бұрын
This is a low impedance circuit to DC and a high impedance circuit to RF. If you substitute a 1M ohm resistor for L2 you now have a high impedance circuit to DC and RF. But there is no RF because the plate has insufficient VDC.
@eugenifibla4496
8 жыл бұрын
Great Video! Very Educational. Congratulations.
@AllAmericanFiveRadio
11 жыл бұрын
Impedance is AC resistance, and it increases with AC frequency. The 39 ohms is DC resistance. That's it.
@mitchellpurelife
8 жыл бұрын
Thank you! Great video! I agree with Don Lewis.
@rolandosalgado1552
4 жыл бұрын
Thanks for share , 👍
@AllAmericanFiveRadio
4 жыл бұрын
Thanks
@southernexposure123
11 жыл бұрын
Thanks for the good illustration. The choke you used was about 39 Ohms DC. The impedance of a coil changes with AC frequency, So let me see if I have this right - the importance of and effectiveness of using chokes rated in certain mH & uH is to choke AC from entering the power supply depending on the different frequencies of the RF amplifiers? And would there be any need for chokes in the IF? Thank you Thanks
@AllAmericanFiveRadio
12 жыл бұрын
Hey John, I've done this before 2-3 years ago, but this one is a little more polished, and it is a different example. Anyway I should have bought stock in a capacitor company before you started working on that TV. Regards, Rick
@Froggy19510
12 жыл бұрын
Another great video. That's why I am a subscriber.
@OIE82
2 жыл бұрын
Very cool video on chokes. So I guess a choke is (can be based on freq.) to AC what a capacitor is to DC. ?
@AllAmericanFiveRadio
2 жыл бұрын
A choke is frequency dependent.
@MrUbiquitousTech
7 жыл бұрын
Great demo Richard, thanks for sharing!
@AllAmericanFiveRadio
7 жыл бұрын
Thanks
@danielpincu7743
6 жыл бұрын
Excellent explaining!
@AllAmericanFiveRadio
8 ай бұрын
Thank you, and your welcome.
@billybonewhacker
12 жыл бұрын
once again im learnin damn it. btw im building some of homer davidsons stuff from his book radio projects you can build.now i undetstand why all the chokes are needed. maybe you could do one on that 455 khz ceramic filter.thanks
@AllAmericanFiveRadio
12 жыл бұрын
Thanks Mick Bradford
@tommee10533
12 жыл бұрын
Fascinating video sir, thanks for sharing it.
@gurtobe
12 жыл бұрын
Cool
@AllAmericanFiveRadio
12 жыл бұрын
Thanks MrSuperheterodyne
@AllAmericanFiveRadio
12 жыл бұрын
Thanks John
@danhassan2108
9 жыл бұрын
It is because the back emf that the AC cannot pass the inductor yet the dc can pass the inductor right? Thank you for another concise video! you are not one of those other youtubers who does not know how to explain circuits:D
@AllAmericanFiveRadio
9 жыл бұрын
AC current is changing constantly which causes the magnetic field to change constantly, and it's the changing magnetic field that is opposing, and are blocking AC current. DC current also produces a magnetic field and this magnetic field does oppose this current, but once the magnetic field is established and has stopped moving then there is no longer any opposition to the DC current.
@jstrunck
12 жыл бұрын
Nice choke vid! Thanks, John
@AllAmericanFiveRadio
12 жыл бұрын
Thanks vibra64
@st2nh
12 жыл бұрын
Many Thanks OM
@AllAmericanFiveRadio
12 жыл бұрын
Thanks skycarl
@ve2dzo
12 жыл бұрын
Hi Rick Do you have a email? Is there a way to check a slb-1 or slb-3 diode mixer for shorts or open
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