Energy transfer in Baluns

#205 In this video on the topic of baluns, I look at the 2 main principles on which the energy gets transferred between the windings - on the one hand you have magnetic coupling and on another you have transmission line coupling. Now, other than these 2 separate methods, there is a third intermediate one - both methods at the same time.
Balun series:
Ep1 - Communication lines and baluns • Communication lines an...
Ep2 - Voltage and Current baluns • Voltage and Current Ba...
Ep3 - Energy coupling • Energy transfer in Baluns
Ep4 - Transmission line baluns • Transmission-Line Baluns
Ep5 - Transmission line experiments: • Experiments with Trans...
Ep6 - The Ruthroff Transformer: • The Ruthroff Impedance...
Ep7 - The Guanella Transformers: • Analyzing Guanella Imp...
EP8 - LC baluns: • Building INDUCTOR-CAPA...
Datasheet:
fair-rite.com/...
Further reading:
eng.libretexts...
Transmission Line Transformers; Jerry Sevick; Noble Publishing 2001
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[@woodrowbeckford7610]

This is fantastic. I have learned more from Fesz on TLT's than reading Jerry Sevick's entire book on the subject.

[@paulp1204]

Hi FesZ, I couldn't resist checking out your latest video, and it was really great, I got a lot of of it. Thank you. Paul Pr

[@helmutzollner5496]

Great video! Always wondered how these black magic magnetic devices worked. Great explanation! Thank you!

[@BartKus]

Any chance of covering wideband binocular core coaxial TLTs? Particularly for impedance conversion, like in RF transistor input/output matching?

[@toruscore]

+1

[@krzysztofsoja5301]

Thank You. Now I understand UN-UN's or BALUN's for HAM radio antennas substantially better.

[@Chilangosta]

Nikola Tesla actually patented a design for an electromagnet using bifilar windings, “capable of neutralizing its self-induction”. It was a critical discovery at the time on the path to greater efficiency coils.

[@mr.cunamis]

Thank you these videos are really helpfull !

[@michaelbulley795]

Brilliant explanation!

[@johnfleming5797]

This is an excellent explanation, thank you! I often see baluns which appear to be constructed as common mode chokes (Guanella baluns). These baluns seem to have bandwidths that exceed the flat region of the real permeability - for instance in a material 61 Guanella balun that has a rated bandwidth of 1 - 55 MHz, while material 61's real permeability begins to decrease at about 2 MHz. How do Guanella baluns compare to the transmission line transformers discussed in the video? Do the work on the same operating principal?

[@MrHeatification]

I love your content

[@olivierconet7995]

It it the fisrt time I see a complete explanation of why we use a twisted pair (or trifilar) winding on a core transformer. Thank you so much ! One question now : If I look at my HF power amplifier, it seems to work also with a (low impedance) coaxial line winding. Correct ? I am still puzzled by the magnetic coupling between inner and outer core in that case.

[@milesprower6641]

Would you be interested in making a video on measuring real and complex permeability?

[@rjordans]

NanoVNA saver (the program used to show the transfer curve of the transformer) can help with that

[@SandeepKumar-jj7zi]

@@rjordans we only get r + jwl graphs vs freq, how can we get complex permeability graphs, we have to input no of turns, ferrite sizes for that?

[@rjordans]

Yes, in the latest version you have a plot for permeability. You can configure the core parameters by right clicking on the graph and setting them through the context menu

[@Mike-H_UK]

Another great video.

[@rjordans]

Great explanation, thanks!

[@R2AUK]

Brilliant ❤ 👍

[@ioannismanousakas3040]

Thanks for the nice videos! How could this type of windings could be used with other than 1:1 turns ratio?

[@FesZElectronics]

You can use 3 or more wires twisted together - to have multifilar coils; and then the ends are inter-soldered, depending on the transformer you need. I'm not sure though if more than 4 wires are ever used in parallel; at some point you will be using multiple transformers interconnected for other ratios.

[@yakovdavidovich7943]

@@FesZElectronics quadrifilar transformers are sometimes used. Practically, it gets annoying to wrap them, though.

[@chiraggupta225]

thanks, very informatics vedio!

[@andrzejpl9897]

👍👍👍 Thanks !

[@СавелСелютин]

спасибо друг! Твое видео было полезно!

[@layt01]

Genius.

[@Wtfinc]

I love baluns.

[@lambda7652]

Wait! is this how Baluns is pronounced?!

[@FesZElectronics]

No clue... I heard multiple ways of saying it...

[@yakovdavidovich7943]

IMO, in English, we should take the first syllable from "balanced", which is a soft 'a', and the first syllable of "unbalanced" (a soft 'u'), and put them together. It's kind of like a portmanteau, and normal practice is to keep the syllables intact. Hence, "balun" with a soft 'a' and a soft 'u'. The way @FesZElectronics is pronouncing it is less common, but not strictly UNcommon, per se :-). I've also heard people pronounce it with a long 'u', basically sounding like the word 'balloon'. But I think the portmanteau aspect is pretty compelling.