RF tutorials - Understanding and building a VARIOMETER

Рет қаралды 10,639

Күн бұрын

#106 In this video I look at a not so common variable inductor - the variometer. I look at how the device works and then I try to build one using a 3d printer and some wires. In the end it does work but it has limitations.
References and further reading:
g3ynh.info/comps/Vari_L.html
3Dfiles available on: www.thingiverse.com/thing:473...
Special Thanks to all my supporters on Patreon! Especially @afiskon and Ralf B.!
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Пікірлер: 40

@jonathanlister5644 7 ай бұрын

Absolutely brilliant! I thought I understood inductors 'till I watched this, thanks.

@cricket1043 Жыл бұрын

Excellent presentation, thanks!

@isaiahnelson3643 2 жыл бұрын

Subbed. This was a concise and cogent explanation for a topic in amateur radio I was recently reading about but didn't understand until this video. Keep the content coming!

@ScientistPrepper 2 жыл бұрын

Real helpful video. Great explaining of everything.

@manuellongo4365 3 жыл бұрын

Always interesting and informative videos - I am now well past tinkering with electronics but still interested.

@dhanujajayasinghe1336 3 жыл бұрын

Great video.

@alifeleparanj3688 3 жыл бұрын

Nice Video! I have been looking for such a thing to use in the matching box of an RF plasma generator

@FesZElectronics 3 жыл бұрын

If you try it, let me know how it works out!

@alifeleparanj3688 3 жыл бұрын

@@FesZElectronics For Sure. I have a suggestion for some videos. There is nothing beneficial video series on youtube about high voltages. I mean videos about high voltage generators and possible topologies, safety considerations, etc. Most of the material and videos about HV on youtube are just show-offs of the results rather than suitable learning material. And because high voltages are dangerous, one can not actually go through with trial and error. High voltages are extremely useful in academic labs, so I can imaging the high number of people looking for something relevant on youtube. So I am suggesting to make a video series on high voltages which can absorb so many viewers. High voltages are attractive to both scientists-researchers and hobbyists. HV video series with educational material can be super popular!

@rhp9797 3 жыл бұрын

Another great video!!

@MegaCadr 3 жыл бұрын

Very cool!

@paulp1204 3 жыл бұрын

I don't know how I missed this video. Is great, I had forgotten that two antiparallel inductors will cancel out their inductance, because it's all about the B field. Thanks Fesz. PS, maybe both your inner and outer coil formers could be shorter, and the relative diameters closer together...

@FesZElectronics 3 жыл бұрын

I haven't tried with short coils, mainly because I wanted to have large inductance values, to make it easier to measure. I think the best approach though to make this sort of device is spherical coils. Even though its very difficult to built, coil length will no longer be an issue, and very small air gaps can be achieved.

@M4CHINE69 Жыл бұрын

Im def printing this for my crystal radio

@M4CHINE69 Жыл бұрын

Oh yeah what gauge wire did you use in awg?

@aurthorthing7403 3 жыл бұрын

Sweet! Now I'm looking at everything in my house to see if I can make a round one. Only thing I can find are plastic Easter eggs.

@FesZElectronics 3 жыл бұрын

If by round, you mean spherical, I've seen those made with cutout circles - have two pieces of 2D circles inserted one into the other at 90 degrees. At least for the inner inductor this works quite nicely and can be made easily from cardboard or plywood - something that looks like this www.thingiverse.com/thing:3401282

@aurthorthing7403 3 жыл бұрын

@@FesZElectronics sweet! Yeah, something like that but I want to make the outer coil round as well. It's a good excuse to get a 3D printer.

@izzzzzz6 Жыл бұрын

I have a ball variometer. Very nice!

@tonychristoph1063 4 ай бұрын

👍

@priyanshukumawat4142 3 жыл бұрын

i recognised your channel from playlist of lt spice and discovered many more great content ,Greetings from INDIA!!

@shubhamnayak9369 3 жыл бұрын

Same bro

@FesZElectronics 3 жыл бұрын

Thank you! I'm happy you are enjoying my content! The LTspice tutorials seem to be my most viewed content, but I try to keep things more diverse and do other stuff also.

@priyanshukumawat4142 3 жыл бұрын

@@FesZElectronics here is a suggestion if you like you can make a playlist of end to end small electronics projects that can be done easily and are intuitive . this is I am sure you can even search on youtube there is no such playlist available may be this will help your channel growth .....

@domtom128 3 жыл бұрын

Great video as always! In what frequency range can it be used, did you maybe measure its self resonant frequency?

@domtom128 3 жыл бұрын

Also how is the coupling varying with frequency?

@FesZElectronics 3 жыл бұрын

I'm not sure if I have the right tools to make the measurement, but if I manage, I will let you know.

@m1geo 2 жыл бұрын

/me clicks the power switch on the 3D printer... Thanks, George M1GEO.

@peterbrowner4687 3 жыл бұрын

Nice movie!!!

@user-vpp 2 жыл бұрын

Can it be used to increase the frequency from 50Hz to kilohertz?

@_wave64_ 3 жыл бұрын

2:24 The SOKOL :)

@FesZElectronics 3 жыл бұрын

You have good eyes :D

@bertoid 2 жыл бұрын

I don't see why spherical coils would be so ideal. A sphere is symmetrical in 3 dimensions, but as it rotates about just one, you can do whatever you like with the other two. So what about rectangular coils? (Similar to compressing the cylinders along the shaft axis, making the coils elliptical) This would allow closer coupling (at the maximum, and lower coupling at right angles, giving greater range) Or maybe make the coils as flat spirals?

@AlienRelics Жыл бұрын

I am going to try exactly that, in a configuration like this: www.abschirmgehaeuse.de/media/images/va1f_01-large.jpg