Finally I find a video made by someone that explains this that I can understand. Bless you Sir and many thanks!
@carminecampo2045 Жыл бұрын
I'm happy you found my video helpful!! Regards
@hpklw13 ай бұрын
Your clear and concise explanation has allowed me to get a useful start to understanding and using the Smith Chart.. I am also in need to build an L network for a remote tuner so this is priceless information you have presented. GOD bless your Sir!
@aerofart Жыл бұрын
I really like the way you demonstrated this. It is perfectly clear. Thank you.
@hellerx338 ай бұрын
Thanks . Now i understood smith chart thanks to you❤
@johnjames3782 жыл бұрын
Excellent, I would like to see more of these videos. I leaned a few things. Please more on how you match the LDMOS devices.
@arcanestudio2 жыл бұрын
I just viewed your video 3X. This is in reference to your final demo. When the shunt capacitive element is in parallel with a higher VNA source impedance, 50 ohms, your circuit will transform the impedance downward to the lower impedance load, 25 ohms. While your lab setup is correct for what it is intended to do, it does not faithfully reflect the drawing that you showed of Professor Long's network. Professor Long's network is drawn to transform a higher impedance load down to a lower impedance source. I suggest that you revise the notebook drawing that you present to reflect what you are demonstrating in the lab. It generates confusion for the viewer. If you would like to see it presented correctly, please watch W2AEW's lesson #276.
@hubercats2 жыл бұрын
Thanks for making and sharing this interesting video. If you make additional videos on this subject I think it would be helpful to demonstrate how matching circuits are used to interface to loads having a complex impedance (resistance plus capacitive or inductive reactance, or Z = R +/- jX). Antenna matching circuits would be a good example since they almost always have non-zero reactance that needs to be cancelled to effect maximum power transfer. Thanks again! - Jim (KK7CSC)
@DeltaSigma1610 ай бұрын
Very informative : Thank you
@danieljohnson84372 жыл бұрын
Thank you. Very helpful.
@tamilarasu6748 Жыл бұрын
Very useful video... thankyou sir 🙏
@carminecampo2045 Жыл бұрын
Thanks for your comments. RF Man
@jon29442 жыл бұрын
very cool, I'm an amateur trying to wrap my brain around all this stuff so I can build a qrp L-match tuner for 28Mhz
@andrzejpl98976 ай бұрын
Beautiful, thank you 👍.
@user-vi6lw8dx5f2 жыл бұрын
RF Man, I really appreciate you sharing this insight. RF Man I have seen some 1/4 wave antennas for cb radio using a L-Match Network for a 11 and 10 meter. Can you please share how this is accomplished? Thank you, excellent video.
@acestudioscouk-Ace-G0ACE Жыл бұрын
Really useful, thank-you. When would I use an L network compared to a Pi match... does the Pi match have any advantages?
@louisseaman84552 жыл бұрын
Another informative video RF Man! I'm curious, and maybe it requires a video to answer, but when would you use an L-network or T-network vs. a transformer? What I am driving at is, for a 1/2 wave end-fed antenna, we use a 49:1 unun, but why do you see 5/8 wave antennas using a T-network instead of a transformer? And is there a rule for when to use which method?
@rfmanchannel69152 жыл бұрын
There is no rule that I am aware of. Most antenna matchers will use either a Pi or T network. Both LC networks can be tuned to match a wide range of impedances. The combination of LC can be considered infinite. A transformer has a fixed impedance ratio limited by the number of turns in the primary and secondary. The ratio is a fixed or finite value and can not be tuned. This may be necessary if the antenna is not resonant at the high or low end of the band.
@louisseaman84552 жыл бұрын
@@rfmanchannel6915 Thanks RF Man; I thought that other than for small tuning adjustment, getting the impedance to match at 1.5:1 or more, using an LC arrangement of any kind was very lossy in some way, even when done at the antenna feed point. I had in my mind that a transformer would be more efficient and after that, just use minimal LC to get the match "perfect". Would you say that's true, or can an LC arrangement be just as efficient to match impedances for power transfer?
@rfmanchannel69152 жыл бұрын
@@louisseaman8455 I agree with your point. I have a video where I use a 9:1 Unun and an antenna tuner/matcher with a long wire antenna. This arrangement works best. Regards
@jasontwynn73562 жыл бұрын
Ok play back speed at 1.5 fast ahead , and he sounds like a normal person talking .