About Capacitors ... Part 5 Non-Linear Capacitor by Andy Davies

[@intotheblue50]

A long time ago now Andy but right up to press with my learning needs, thank you very much Andy..

[@victoryfirst2878]

Thank you Andy for increasing my knowledge of linear and nonlinear capacitor values. I just did not know that. Good job fella.

[@medi40]

Great series of videos about capacitors. Hard to find in such way your describe in other sources. I liked and enjoyed them so far. Many thanks.

[@AllAmericanFiveRadio]

Hey Andy, Neat demo of linear and non-linear capacitors. And most important the why. I just looked at a few of my 1920s radios and of course they have linear tuning capacitors. I guess the non-linear tuning capacitors was developed when the frequency was put on the dial. The earliest radio I have that has the frequency on the dial, plus 0-100, is the 1929 Radiola 66. Regards Rick

[@leonhardeuler8457]

Thanks Andy it was useful

[@nlo114]

An excellent presentation. I learned this many years ago, but it would have sunk in a lot quicker if explained this way.

[@AndyDaviesByTheSea]

Thank you, it's an old trick but it still works. . . Andy

[@engineereuler1762]

Andy. The math was very interesting for the off centre rotation axis. The area inyegral was cool and i wish that there is a way to send you the curve of the resonant frequency versus the rotation angle and how to choose the distance between the circle centres and the axis of rotation to maximize frequency linearity. God bless and 73

[@AndyDaviesByTheSea]

Well thank you for the complements, you’re most generous. I enjoy radio and electronics and enjoy making the videos although it does take a lot of time to get thing half descent. I know some are really badly lit and others have poor sound but I’ll put the blinkers on and graciously accept the Oscar. As for being a teacher? ... I don’t think so, I’m just happy to help a few folks on KZbin. Kind Regards ... Andy

[@arthurharrison1345]

Great tutorial!

[@AndyDaviesByTheSea]

@AllAmericanFiveRadio Hi Rick, I’ve got two crystal sets and they both tune with a variable inductor, do you think when they introduced variable capacitors that the folk back then said, ‘This new technology with non-linear tuning capacitors ... it’s not all progress is it’ ? Thanks for the nice comments. Kind Regards ... Andy

[@MrTrangen1]

can you do video? or do you have video on where voltage goes, where is input? where is output? to change frequency of electricity? Thx

[@AndyDaviesByTheSea]

Hi there, I don’t have the time at the moment to make a more detailed video for you but have a look at the KZbin channel ‘AllAmericanFiveRadio’ I think you’ll find that Rick has made some videos about capacitors that may be of interest to you, I hope that helps you. Kind Regards ... Andy

[@danielpincu7743]

Very educative and interesting! DE YO8UFO, 73.

[@AndyDaviesByTheSea]

@medi40 Hello and thank you. I don’t know that I have a style of presenting but I try to tell it in a practical way and I a way that will be remembered. Did you see that I’ve made a series of 18 videos where I go through the circuit diagram of an old GEC valve (tube) radio and talk a little about each components and I connect the oscilloscope in some and show what’s going on. Thanks for the feedback as it’s the only way I know if it’s appreciated. Kind Regards ... Andy

[@Landrew0]

So, as I understand it, a non-linear range can be made linear by applying the reverse non-linear scale to it.

[@RssutharJaisalmer]

Strong Radio capacitor gang

[@AndyDaviesByTheSea]

@MickLBrad Hi there, I know what you mean; I wish that as a child that I had had access to the wealth of information that’s at our fingertips now. Hopeful what I have to say just might make a tiny contribution to someone’s understanding of things. By the way in the mid 50’s I wouldn’t have been much help, in the mid 50’s I cut through a cotton covered mains lead (240 Volt) with a razorblade, I expected the electricity to dribble out, don’t try this at home children! Kind Regards ... Andy