Hey Tam, the response to this video was more positive than I expected. I will do more on the Smith Chart 👍

Howdy Andy, glad you liked it bro!

Hey Tam. The response to this video has been better than what I expected. I will do more stuff on the Smith Chart in the future 👍

Glad to hear it Dell, thanks for watching 👍

When I found the smith chart on the NanoVNA it was everything I wanted / needed to know to get my antennas working I have SWR / Logmag, but it is the Smith chart I go to to work out how to fix issues. For example, a friend was putting up a fan dipole for 40 & 80. We could get a match on 40, but the match on 80 was pretty ordinary. Best SWR was 1.8:1 I had a look at the smith chart and it showed, what I expected, that the impedance was a little low at resonance because of its proximity to the ground. Simple fix. Increase the impedance at resonance by feeding the 80m dipole slightly off centre. Worked a treat….until the weather took it down a few months later. :-/

Thanks SF, glad it was helpful 👍

Awesome story MidLife, I agree. Once I got the Nano I started to understand antenna behavior much better 👍

@@TheSmokinApe I used to use a home made gate dip oscillator. Had a set of coils wound on wooden kite dowel shoved into a 3 pin DIN plug. Used that to find resonance and then add some sort of L match at the feed to get the SWR right. These days we are so spoilt for affordable tech to home brew, VNAs Spectrum analyzers. Storage Oscilloscopes and function generators. Even component testers for $20 Almost no excuse not to be making stuff. Antennas, match units, radio gear…you just have to get over the optional anxiety of which one project to start on 😊

Hey Doug, glad you liked it 👍

haha, thanks for checking it out Hollywood!

Glad you liked it!

Thanks for watching Scott 👍

lol, thanks for watching Brian 👍

I can do more more on Smith Charts, I do have a few on Impedance 👍

Thanks Don, glad you like them 👍

Haha, thanks for watching 👍

@@TheSmokinApe my pleasure you have good videos plus educational content

Gald you like them

That comment had me choking on my morning coffee. 😂

I was laughing, too. I can’t believe what a train wreck that freq is. It’s embarrassing, actually.

Thanks Rohn, glad you liked it 👍

Hey James, glad you liked it. Thanks for watching 👍

Glad you liked it, thank you for watching 👍

Hey Mike, it wasn't just you. There are a few flavors of Smith Charts, here is the one I used for the video: www.eeweb.com/wp-content/uploads/smith-chart.pdf

Hey GDL, this video had a better response than I expected, so I will do more. AND you are right, there are a few good online tools that are helpful, thanks for watching bro 👍

THanks Adam, glad you like the videos 👍

Thanks for watching Mark, glad you liked it 👍

Thanks for watching Janice 👍

Thank you very much!

Hey BA, glad you liked it 👍

Haha, thanks for watching Cliff

I have a lot of friends who use open wire feedline, I put comments in like that to joke with them. So, when it comes to antenna like EFHW that are harmonically "resonate" on multiple bands, that's not really the case. An antenna generally "that's the word I used in the video" is resonate on a single frequency and near resonate on harmonically related frequencies. I have bult, bought and tested a great number of them and I have never seen one that was truly resonate on any HF frequency much less multiples. Thanks for watching Curt 👍

you need to do a 1/4 wave. the matching network will make them resonate on single frequencies. try a simple 40 meter dipole you will be resonant on multiple frequencies. don't expect a 1:1 match every where, but you will be able to use a lot.@@TheSmokinApe

SideBoom!

@@TheSmokinApe you know us CB'ers can't read nothing but swinging needles

@@ubergeek318 well, I wasn’t gonna say anything…

Thanks awesome Ben, glad to hear it was helpful 👍

Thanks Dan 🍻

Thanks Allen 👍

Thanks for watching 👍

Glad you like the videos 👍 I'm going with south central USA!

Hey Bill, thanks for checking it out 👍

Right

In reality, resonant or near-resonant dipoles can be thought of electrically as loops. What comes around goes around. So if you have a dipole, somewhat near the center feedpoint you can add inductance or capacitance to counter what reactance you have measured. Lets say you have 100 ohms capacitive measured at the dipole feedpoint. you can add near the feedpoint a coil with an XL of 100 ohms. Remember I said it looks electrically like a loop, you can add 2-50 ohm coils on each side of the dipole instead of 1-100 ohm on one side. Which side doesn't matter. It's like a loop. That being said, the impedance of a halfwave changes so if you have a OCFD or an end-fed. do the correction near the center of the halfwave antenna and not at the feedpoint as the correction can be smaller. That's going to require some calculation as to what you will need to have, but it can be done. The length of the antenna determines the radiation resistance. The resistive losses will be fairly constant. I say this because we all know that the center fed dipole is around 72 ohms. You can shorten the antenna until it's 50 ohms and you can add the inductance to cancel the added capacitive reactance of the antenna. Then you can approach a perfect match at some point in the band. Not the whole band. Of course use good workmanship techniques and use strain relief and strong wires and coil forms. If you have an inductive antenna, be concerned with your capacitance voltage ratings and it needs to be a tough capacitor. You can look at a doorknob capacitor for some of the strongest components or build your own with a capacitance or NanoVNA meter to make adjustments. So you need capacitance to cancel too much inductance, an inductor to cancel too much capacitance and a transmission line transformer to correct to the center of the Smith Chart. Good luck. N9XR

Hey M7BXR, you are on the right track. I would appear my friend, at least I think we are friends, Mr. BDRFI nailed it as always.

@@TheSmokinApe I liked his last 2 letters on the callsign.

@@BusDriverRFI I knew it had to be something 👍

I'll work something out. The response to this video is more positive than I expected so I will do more.

There's no correlation between the Smith Chart and the radiation pattern. Whatsoever. The Smith Chart discussion is one topic. Radiation patterns is another topic. You can determine the Smith Chart data from an antenna design, but you can't determine an antenna design or radiation pattern from a Smith Chart set of data. de N9XR.

Hey HVACER, Mr. BDRFI is correct.

I can, I will put it on the long list. Short answer is fat, short with space between the coils is more efficient.

Haha, thanks Goober, I will let the boys know we have a new show idea...

I’ll get to it one of these days, kinda busy with cat videos at the moment

@@TheSmokinApe Oh my.

Right

Maybe, but I think the OMs say "pure resistance" 👍

Yeah I know, I was just desperate to squeeze in a cheap pun! I loved your explanation. These diagrams used to make me dizzy!@@TheSmokinApe

Hey Angel. Sometimes folks feel dumb, but that's because they are exposed to something new, over time the complex will become simple. We are all new at first and feel this way. Look at it like this, in order to interpret a Smith Chart at a glance you need to know the parts of the Smith Chart and what they mean, that's what I covered in the video along with some extra stuff. If you even only take that part away you have a stronger understanding than before AND the next time, it's less complex. Thanks for watching 👍

You are completely right my friend. Is just that sometimes we live a life so busy that the little bit of time we have to play radios is to take a tool and find “it works? No? Move one” you know. I hope one day (probably when retire) have the time and brain to learn all the ins and outs. Thanks for your honest and down to earth reply.

Thanks for watching Angel 👍

C'mon son!

@@TheSmokinApe 😄👍

That's a totally loaded question. 1. First of all, the signal doesn't bounce back and forth if you use a transmatch and it is set for 1:1 SWR. It only bounces back and forth if you have an unmatched transmatch or no transmatch with a reasonably high SWR. Of course it can only be matched at one frequency, yada yada yada. I'm talking about staying within your tolerance you set. 2. Second. Look at your smith chart. Where it's at is important. If it's RESONANT, then your transmatch should load to your antenna well. The transmatch will transform the voltage and set the voltage to optimize the power into the antenna. 3. Third. If it's inductive or capacitive, your antenna is setting up a power factor that will shift the current phase and common mode currents will then exist. Your feedline will radiate. Even if your SWR at the transmitter says 1:1, your transmission line is radiating. 4. Lastly, if the antenna is very close to 50+j0 you don't need a transmatch. Where you are along that circle you can draw in the middle is important to know beyond the fact that everywhere along the circle it's at the same SWR. Good Luck. de N9XR

Absorb what you can and re-run the video. Absorb more. This one is fairly good.

@BusDriverRFI I'll revisit it after I learn some other things that pertains to antenna propagation

@@deplorable-0ne Smith Charts has really little to do with propagation. It has little to do with radiation patterns. You can derive smith chart values from an antenna design but you can't derive an antenna design from a Smith Chart.

@BusDriverRFI so it's basically plotting the electrical values of an antenna on a chart after its built?

Thanks BDRFI

Everyone loves hot pockets 👍

@@TheSmokinApe mmmmmmm. Yes indeed.

Right

lol, thanks for watching bro 👍

Thanks for the info on the tube amps, I really don't have much experience with them.

Bitter much?