7:52 is where Ape really hits it out of the park. The concept of actually adding either capacitive reactance or inductive reactance by changing the overall length of a dipole is SPOT ON! I have never heard any lecture or any antenna book actually come out and say this, but it is an accurate statement. BRAVO APE for teaching this very valuable concept. 73
@TheSmokinApe2 жыл бұрын
Thanks for checking it out WEC 👍
@paulm0hpd319 Жыл бұрын
Yes I agree although reflections by Walt Maxwell does go into it also more should be mentioned of what happens to reflected power as its not all lost and certainly doesn't damage equipment as many think
@CL-ty6wp Жыл бұрын
@@paulm0hpd319 You might enjoy Eric Dollards presentations
@citicolina2 жыл бұрын
Your way of explaining these not so intuitive concepts is really clear and to the point. I’d would also appreciate some info regarding Smith charts like another person mentioned. Thank you for sharing your knowledge!
@TheSmokinApe2 жыл бұрын
Hey Jorge, glad you like the videos! I add Smith Charts to the list.
@davidquackenbush3957 Жыл бұрын
Unbelievably well done! Thank you! I’m a GMRS Guy that got talk into being a Ham guy as well! I have been working on building a GMRS repeater system in our area for the last year! Its doing well…I sure have learned a lot about antennas the hard way and the expensive way! Anyway this video of yours really helps simplify ( Clear up) what is really a complicated subject! Next to info like this NanoVNA is an awesome tool to own! Extremely useful antenna diagnostic tool… As with most complicated things information is everything… Thanks for all your videos I always learn something with everyone I watch.
@TheSmokinApe Жыл бұрын
That's awesome David. Welcome to Ham Radio 👍
@traceyhanley2877 ай бұрын
I’m halfway through getting my Ham license, and this topic is not an easy concept to understand… I’ll be watching more of your videos!
@TheSmokinApe7 ай бұрын
It’s confusing at first but you will get it, good luck on the test 👍
@RL-5215 ай бұрын
Man this helped out a ton, thanks!! Will be watching your smith chart vid later this evening. 73's
@TheSmokinApe5 ай бұрын
Thanks R L, glad you liked it 👍
@kiweekeith2 жыл бұрын
Thanks a Stack for a Wonderfully Informative, yet 'Simply' explained vidclip .... Best to You, Yours and All, ..... from New Zealand
@TheSmokinApe2 жыл бұрын
Thanks for watching Keith, glad you liked it 👍
@mikeZL3XD70298 ай бұрын
Yay!, Back in the day of me being a trainee electrician, we had to calculate all of this sort of stuff for electrical circuits in an exam situation, I'd already passed the written test for my Ham radio licence and I found it quite easy, lots of electricians failed this part of the exam. This sort of thing can be really intimidating, if you've never worked with AC theory that depends on frequency as a part of the equation. My advice is, if you have something like the ARRL book, read and know the sections on basic AC theory, yes it is REALLY dry and boring, but it will hold you in good stead for when you go to build and tune antennas! Awesome video, Ape.
@TheSmokinApe8 ай бұрын
Thanks Mike, and yes the ARRL handbook is a fantastic resource but that too can be intimidating at first. Thanks for watching bro 👍
@bill-kf4cdk4852 жыл бұрын
Enjoyed the video and it is coming, for me at the right time. If you count comments I'm with Scott, W9AVA, I would watch one of your basic/easy to understand video on smith charts.
@TheSmokinApe2 жыл бұрын
Hey Bill, I will do one on them in the future. Thanks for watching the video 👍
@bill-kf4cdk4852 жыл бұрын
@@TheSmokinApe looking forward to it.
@FEPLabsRadio2 жыл бұрын
Outstanding explainer. I use a RigExpert instead of a nanovna, but they both get the job done. I'd love to see an in-depth smith chart video!
@TheSmokinApe2 жыл бұрын
Thanks for watching FEP 👀👍
@karlmadsen31792 жыл бұрын
The Smith charts!? How soon is now?
@ShooterReadyStandBy2 жыл бұрын
A smif chart video would be helpful for those studying for their extra. There are questions in the pool on the chart.
@TheSmokinApe2 жыл бұрын
Hey Shooter, I’ll put the smif chart on the list 👍
@rlm97511 ай бұрын
Excellent explanation.
@TheSmokinApe11 ай бұрын
Thanks, glad you liked it 👍
@jamescstanley50182 жыл бұрын
Very informative video, thank you. I also use a Nano VNA, but until you explained it I had no idea what the heck the Smiths Chart was! In the UK, lower level license holders, like me, an M7, are restricted to only 10 watts. Some say this is a good thing, in that it teaches new Hams the importance of an efficient antenna system, we can't just turn up the juice to get out further! I actually agree with this, so any info on improving my antenna systems will be helpful, so I, for one would appreciate an in depth look at the Smiths Chart, and any other indicators of efficiency. I appreciate that this is a bit of a niche topic, so not a priority, given the likely number of views, but it would help. Failing a video, could you point me to another Tuber who has done a video on the topic. Keep up the great work Jim M7BXT
@TheSmokinApe2 жыл бұрын
Hey James, being limited to 10w does "encourage" antenna expertise. I added smith charts to the list, in the meantime these might help. kzbin.info/www/bejne/h4mbeWuLbMhqZ9k and kzbin.info/www/bejne/q3Kmfa1moa2gZ5I
@PARTner912 жыл бұрын
You’re teaching me all the things I memorized (but didn’t understand) to get past my Extra Class exam back in the 90s 😝 Seriously. Thanks man. Now I wanna see a System of a Down t-shirt in a future video 🤘🏻
@TheSmokinApe2 жыл бұрын
Glad to hear its helpful, thanks Max!
@trig6712 Жыл бұрын
You took me back a long way there Good Excellent demonstration . Cheers for Noo
@TheSmokinApe Жыл бұрын
Glad you liked it Trig 👍
@Caseytheradioguy4 ай бұрын
Great Video, Very well explained
@TheSmokinApe4 ай бұрын
Thanks Casey, glad you liked it 👍
@W9HJBill2 жыл бұрын
Excellent video! Spelled out in clear language that just about anyone can understand. Heck, I'm an Extra and I even learned something (what the capacitor on an EFHW is actually for).
@TheSmokinApe2 жыл бұрын
That's great feedback Grimace, thanks man! Glad it was helpful.
@GH0ST3694 ай бұрын
Another awsem video SA, thank you for all you do!
@TheSmokinApe4 ай бұрын
Hey Ghost, glad you liked it... 👍
@gbxx68122 жыл бұрын
Thanks for taking the time in creating this video. I learned a lot.
@TheSmokinApe2 жыл бұрын
Glad you liked it G, thanks for watching 👍
@elmoreglidingclub3030Ай бұрын
This is excellent. I’ll be watching your antenna and VNA playlists, for sure. I’m new to the ham world and antennas are very interesting. I have the MFJ analyzer and my NanoVNA just arrived. Hoping to learn more about Smith charts, but first, more about impedance, reactance, and resistance. I have just erected a 40 m dipole in a row of Crepe Myrtle trees. The feed point is only 18’ off the ground with the ends at 12 1/2’. Hoping to get the feed point up at least a few more feet. I think I’m in, or right at the top of, NVIS territory. Oddly, I’m trimming a lot of length and the best SWR is still around 6 MHz. Thanks again. Much appreciated!
@TheSmokinApeАй бұрын
Glad you liked the video, here’s one I did on Smith Charts you might like: Demystifying Smith Charts for Ham Radio Beginners kzbin.info/www/bejne/baS6gKealqyEndU 18’ is a little low for 40 but as you mentioned you are likely getting some contacts from steeper take off angles. Just have some fun experimenting with the antenna.
@elmoreglidingclub3030Ай бұрын
@@TheSmokinApe Thanks! And yeah, I’m using WebSDR and KiwiSDR to listen for my Morse fumblings. While I’ve heard myself as far away as Spain, Ireland, and the Canary Islands, and routinely up into North Carolina and down to Louisiana (I’m in Alabama), I cannot hear myself on a station that is a mere 20 miles from here. 🤷♂️
@TheSmokinApeАй бұрын
It’s gonna depend on the antennas and their relative take off angles, super close can be problematic at times 👍
@elmoreglidingclub303019 күн бұрын
@@TheSmokinApe Yep, there’s a guy running KiwiSDR about 18 miles as the crow flies and I hear nothing from his rig. Quick question: I have the small NanoVNA and am thinking of getting the larger one. Which one do you have, or recommend? Again, much appreciation for all the videos. Getting in to coax measurements and Smith charts now….
@radiotests2 жыл бұрын
Man you did it again with an excellent video. You really are an asset to us all. Thank you!
@TheSmokinApe2 жыл бұрын
I appreciate that!
@timdbl7804 Жыл бұрын
Wow! Congrats! A technical video, in ham radio-world, on antennas, which seems to be correct! (It's a rare find! 😄). I haven't watched this all, but the bits I dipped into seem good! 😀
@TheSmokinApe Жыл бұрын
LOL, thanks Tim 👍
@bak2bassix Жыл бұрын
This is a great video. Complex high tech information delivered in manageable bite size chunks. M7MDO
@TheSmokinApe Жыл бұрын
Thanks MDO, glad you liked it!
@slick8086 Жыл бұрын
I love the smell of impedance in the morning!
@TheSmokinApe Жыл бұрын
Lol., that’s a good one ☝️
@KM4ACK2 жыл бұрын
Great info as always. Would like to see the one on smith charts as well 👍
@TheSmokinApe2 жыл бұрын
Thanks Jason, glad you liked it. I put the charts on the list.
@phillyedhrj2 жыл бұрын
Great explanation, Ape! Thanks and 73!
@TheSmokinApe2 жыл бұрын
Thanks Ed, glad you liked it!
@stephen17112 жыл бұрын
Really enjoyed this video. Helped demystify some concepts for me. tnx
@TheSmokinApe2 жыл бұрын
Awesome, glad you liked it Stephen 👍
@stevet75222 жыл бұрын
Great video and you now have me worried about how bad my antenna is. I would also like to see a good video on the smith chart and what it all means. 73.
@TheSmokinApe2 жыл бұрын
LOL, the truth of the matter is the all antenna systems have a problem/issue/compromise somewhere. Just go out have some fun and make improvements as necessary over time. Thanks for watching Steve!
@karlmadsen31792 жыл бұрын
No impediment to impedence importance impression. Impression imparted. I'm pumped.
@TheSmokinApe2 жыл бұрын
Lol, thanks for watching Karl 👍
@derrick_builds2 жыл бұрын
Great video. Just got a VNA a month ago and like learning how to use them.
@TheSmokinApe2 жыл бұрын
Hey Derrick, that VNAs are pretty cool. Thanks for checking out the video 👍
@Intellistan Жыл бұрын
Go for that smith chart, please. That would be great
@TheSmokinApe Жыл бұрын
I’ve been using them more in my videos and have some more planned, thanks for the feedback 👍
@dark30welderwelding112 жыл бұрын
And this understanding has become a lost art. Years ago this was a common understanding … we all learned and understood this. Not a totally big deal but it becomes a big deal when your running really low power or really high power. Definitely helps you learn to MacGyver a solution on the fly when you need to. Most all the fancy analyzers will show you the sub components of Z. What I don’t see KZbinrs doing that would be nice is teach new hams how to read that wonderful info and what it means when your SWR is 1.2 but your reactance components total 40 and the ohmic is 10. Thanks for all you do. Good explanation Please consider going just a little deeper in another video.
@TheSmokinApe2 жыл бұрын
Hey D30W, I agree that this type of info can be a little hard to come by on YT. Thanks for the feedback! I do plan to continue exploring the topic in videos.
@bassangler73 Жыл бұрын
Very good video!
@TheSmokinApe Жыл бұрын
Glad you liked it BA!
@ryanjennings50502 жыл бұрын
Nice video with some good technical content.
@TheSmokinApe2 жыл бұрын
Thanks Ryan, glad you liked it!
@MikeN2MAK2 жыл бұрын
I enjoyed this. Add me to the list of those looking forward to the Smith Chart video.
@TheSmokinApe2 жыл бұрын
Wil do Mike, thanks for checking out the video 👍
@hamradiowithkevin2 жыл бұрын
Excellent presentation, thanks Ape
@TheSmokinApe2 жыл бұрын
Thanks Kevin 👍
@dillogroup8 күн бұрын
Would love a video about Smith Charts!
@TheSmokinApe7 күн бұрын
He is one I did a little while back: kzbin.info/www/bejne/baS6gKealqyEndU
@LevyCarneiro2 жыл бұрын
You have the best lectures in ham radio, I always understand 100% the topics you cover here. Thanks! Suggestion for a video: SWR vs actual power radiated. For example, does a 1:2 SWR mean I’m only radiating half of the power that arrives at the antenna after the coax? Thanks!
@TheSmokinApe2 жыл бұрын
Thanks Levy, glad to hear you like the videos. Here are two I did that should help with SWR, Return Loss and Transmissions lines: kzbin.info/www/bejne/h4mbeWuLbMhqZ9k and kzbin.info/www/bejne/d3aUfqmir85nnas
@LevyCarneiro2 жыл бұрын
@@TheSmokinApe thanks, man!
@HowToFixDevices3 ай бұрын
Thanks a lot
@TheSmokinApe3 ай бұрын
Thanks for watching HTFD 👍
@Tump20102 жыл бұрын
Nice informative video.
@TheSmokinApe2 жыл бұрын
Thanks for watching Thump 👍
@darylnd Жыл бұрын
Great video, Ape! Many thanks!! I'd watch a video on Smith charts. I have a NanoVNA, but I've never used it in the field. I thought about it last week, at the Don Edwards San Francisco Bay National Wildlife Refuge (K-0189). There is public access from San Jose, Santa Clara County, and from Fremont, Alameda County. I'd never been to Don Edwards before, for any reason, and I went to the San Jose side to check it out. With short trees and pedestrian trails, I couldn't find a suitable place to string my EFHW in any configuration. I finally decided to try an inverted-V from the rear deck of the (closed until further notice--Chicom Crud and all that) Environmental Education Center, using a protruding roof beam as the apex of the V. My inverted-V turned into an inverted-something-or-other, as I ran out of space before I ran out of wire. I thought it would be interesting to measure SWR in that configuration, but what I thought was clearing sky turned out to be just a space between storm fronts, and the downpour began quite abruptly at that point. I did get a few QSOs on 20m, FT8, from Utah, North Dakota, Kansas, and Iowa.
@TheSmokinApe Жыл бұрын
LOL @ inverted-something-or-other!
@idonthaveaname42 Жыл бұрын
He.. shed some light.. i see what u did there
@TheSmokinApe Жыл бұрын
Lol, thanks for watching 👍
@TheLjh737 ай бұрын
Hey sir. I really appreciate your videos. Always informative. I am curious about something though, when you have a Smith chart and it shows a bunch of circles really tightly wound together does that mean you're antenna is doing well?
@TheSmokinApe7 ай бұрын
The tighter around the center the better 👍
@don_n5skt2 жыл бұрын
Thanks for the video Ape. I don't think you covered the case of ladder line because as I understand it, the ladder line will not dissipate heat in the same way as Coax. On another note, I can really see what SWR does in a more dramatic way with the Amplifier because instead of a few watts coming back, it can be hundreds even with a lower SWR in the 1.7 range.
@TheSmokinApe2 жыл бұрын
Ladder line? Ain’t nobody got time for that!
@radiotests2 жыл бұрын
If you visualize Ladder line like train tracks with EMF rockin and rolling down the center you then understand how it was improved and used inside a metal tube to stop RFI from other lines "reacting and impeding" and then finally one conducter as a shield and the other line as the center conducter called coaxial cable. Using Maxwell and Lorentz's math to send the RF train down any 2 conducters or for really high frequency EMF down a square, round or triangular tube called a wave guide is mega fun. Get the math wrong and you enter into the world of melted antennas and swr induced magic smoke. 73 kd9uqe
@don_n5skt2 жыл бұрын
@@TheSmokinApe But . . . But . . . Chuck said . . .
@phildurall74662 жыл бұрын
I think I got it Son! ... If your "Impe" "dance" ain't right, then your antenna can't dance! Nice job covering the subject Ape! 73 - KF6IF
@TheSmokinApe2 жыл бұрын
Lol, glad you like it Phil 👍
@tomstrum6259 Жыл бұрын
Great info, Ape !! ...Making sure I have this correct.....Assuming the usual std 50 ohm radio, coax & antenna feed point at the freq of interest & making diy antenna (yagi) optimization adjustments......If NanoVNA shows antenna R= 50, X=0 & SWR = 1 : 1.00 the antenna system is Resonant & perfectly Z (impedance) matched to 50 ohms......However, any Significant X (how much Is significant ?...>1, >10, etc) the Driven element Length & Feed match Should be adjusted out to Minimum X reading (more Resonant) & Closest to 50 R, 50 Z & Lowest SWR ......X is Less desirable than R Deviations from 50 & should be corrected 1st .... ??
@TheSmokinApe Жыл бұрын
I believe that is correct!
@N7ECVQRPLIFE2 жыл бұрын
It's all voodoo until the Ape lays it on the table. Thanks OM
@TheSmokinApe2 жыл бұрын
Haha, thanks for checking out the video Shawn 👍
@watthairston1483Ай бұрын
Excellent treatise of a "complex" topic...😂
@TheSmokinApeАй бұрын
Thanks Watt 👍
@TheJkowi2 жыл бұрын
Nice and simple explanation 👍 Shouldn't "J" be lowercase (06:00) ?
@TheSmokinApe2 жыл бұрын
Well, your prolly right on that. Thanks man!
@tedmead4659 ай бұрын
The only use of a multimeter in antennas is as a continuity tester to check for open or shorts.
@TheSmokinApe9 ай бұрын
Agreed. You’d be surprised at how many time I’ve seen “experts” claim to be measuring impedance with a multi 👀
@AllenGrundmeier5 ай бұрын
Including the idea that impedance is the resistance to CHANGE vs merely the flow of electricity would help.
@TheSmokinApe5 ай бұрын
Thanks for the feedback Allen 👍
@BusDriverRFI Жыл бұрын
Just a quick point. There's no such thing as making an antenna electrically longer or electrically shorter without physically making it longer or shorter. If you look at that half wave 35ft 40m dipole, your "impedance" will read somewhere in the neighborhood of 73 +j0. Great. We may have a 1.5:1 SWR. No biggie, right? If we add inductors in series of the dipole elements, we will bring the resonance down but the radiation resistance stays the same because you can't electrically lengthen the antenna without physically lengthening the antenna. The R value changes with a physical element length change but the R value doesn't have much change with the additional series inductance. Therefore, you can take like a 58 foot flat top dipole and that R value is now pretty close to 50 ohms at 40m. See where I'm going with this? Yep. Now you can add a couple of inductors near the feed point to cancel the high capacitive reactance and voila, now have a ... 1. Short Dipole 2. SWR near 1:1. You talk about the R value, but I'm not really hearing you say that this is what our hobby is all about. That's where our antenna current does its magic and radiation takes place. Put some feeling into it. Yay!!!
@Frankh77 Жыл бұрын
At the end, you said 7.1 J of inductance. Was that a verbal typo? I misheard it while going down other mental roads with antennas?
@TheSmokinApe Жыл бұрын
It could have been, thanks Frank!
@victorb22622 Жыл бұрын
In short video , you cover lot.some lines are very important ,that "swr dip is in left ,it means antenaa length is longer and need to tream" actualy i was searching like this type of video that can actualy tune antenna using smith chart.most people make typical video in smith chart just like a college professor where student never understand 😀
@TheSmokinApe Жыл бұрын
Thanks Victor, glad to hear it was helpful.
@SMShannon557 ай бұрын
The subject of resonance in multi-band antennas would be a good topic for the Smoking Ape treatment. Using a RigExpert to analyze a friend’s ARRL EFHW, we found that impedance due to inductance and capacitance summed to zero at numerous frequencies. That’s generally considered as the definition of a resonant frequency. On the Smith Chart it would be seen as a crossing of the horizontal centerline. Is there an additional criterion for resonance that I should consider? How does your statement that resonance only occurs at a single frequency (which is what I believed also) align with the fact that there are numerous examples of frequencies where reactance is zero?
@TheSmokinApe7 ай бұрын
Hey Shannon, I am going to guess you were measuring through a transmission line. So what you are actually seeing is the impedance of the antenna system and not the isolated antenna, which is fine. The transmission line does effect the overall measurement. I'll be doing a video on the effect of transmission lines at some point. Thanks for watching the videos 👍
@SMShannon557 ай бұрын
@@TheSmokinApe - exactly right, probably about 38 feet of M&P UltraFlex 10. Is there any reason I couldn’t connect my RigExpert directly to the EFHW via an adapter or jumper cable with an N male on one end and pl259 on the other? Would it be necessary to calibrate the RigExpert with SO239 standards (short, open, load) first, or will the effects of the short (under a foot long) jumper be noticeable?
@digitaldreamer54812 жыл бұрын
I was doing fine until you got to the NanoVNA portion and then lost me. I trust everything you say Ape but I need to learn to make my own mistakes I guess, lol! Great video as ALWAYS! Todd WH6DWF 🇺🇸🇺🇸🇺🇸
@TheSmokinApe2 жыл бұрын
Everyone is like that around the VNA at first, thanks for watching Todd!
@tedmead4659 ай бұрын
The nanovna is easy to use and there are numerous good videos on them. They are not a bench quality vna but still a very accurate tool. You can do a heck of a lot more with them than you can with an ordinary antenna analyzer
@DominicMazoch2 жыл бұрын
I know Z can mean impedence. But most people use the cap Greek letter Omega for these equations. Plus the Italic for other letters. The equation is a one off, but keeping with what we see in the ARRL, textbooks, might keep confusion down Otherwise, great vid.
@TheSmokinApe2 жыл бұрын
Thanks for the comment Dominic. So what I have seen we use Z to represent the word "Impedance" in formulas and we use the Omega sign to mean Ohms or the unit of measurement. Similar to how folks use I to represent current but the unit is Amps. That said I have seen more than one naming convention. Glad you liked the video!
@Fireman9143Ай бұрын
Which came first: Feedline impedence or antenna impedence? I'm trying to figure out how long to make my feedline for a multiband vertical. So confusing
@TheSmokinApeАй бұрын
This might get me in hot water but I’d make it as long as it needs to be for the run and put a cmc choke on either end. Being a multibanded antenna you will never have the “perfect” length.
@Fireman9143Ай бұрын
@@TheSmokinApe Thanks! I've watched a bunch of your videos on chokes and baluns etc. Would you measure coax impedance from radio, then antenna impedance, then calculate impedance match? or just go 1:1 at both ends? Any specific video I should watch for this scenario?
@TheSmokinApeАй бұрын
When I am tuning an antenna I test from the coax that goes into my ATU or Radio. I’m not as concerned about what happens at the antenna feedpoint as my primary concern is what is presented to the ATU / Radio
@marvinradimak932210 ай бұрын
A lot of people become obsessed with trying to get a perfect tune on their antenna. Most antennas are a compromise. You can get close but never perfect. As soon as you change frequency things change. I always say horse shoes and hand grenades. Get it close and don't worry about it. Just have fun. Informative video.
@TheSmokinApe10 ай бұрын
Totally agree, thanks for watching Marvin 👍
@quaildogusa6 ай бұрын
Is SWR (without a tuner) an indication of resonance?
@TheSmokinApe6 ай бұрын
if you have a perfect 1:1. Resonance is when there is no reactance...
@keylanoslokj180610 ай бұрын
SWR measures characteristic impedance versus load impedance?
@TheSmokinApe10 ай бұрын
SWR measured the delta between forward and reflected power 👍
@keylanoslokj180610 ай бұрын
@@TheSmokinApe isn't the ideal zero difference?
@TheSmokinApe10 ай бұрын
Yes, they call that a 1:1 ratio
@OregonDX Жыл бұрын
So I’ve gone down this rabbit hole of antenna tuning. I mounted a Laird NMO27 10-11 meter base loaded whip antenna on my truck for CB. I borrowed an MFJ analyzer from a friend and tuned the SWR as low as I could on the center freq. Under 1.8 across the band.. But my Impedance scale was as low as 20 ohm.. But it’s a 50 ohm load, with a 50 ohm coax. (RG58/u). I assumed maybe the Velocity factor was causing the low impedance. So I tried adding a couple jumpers just for test readings to no avail. . I haven’t encountered this issue before. I even grounded the antenna bracket with 1” ground strap to the hood. No effect. Anyone have any hints? Thank you for your time.
@TheSmokinApe Жыл бұрын
With AC current antennas will react differently with varying frequency. Impedance is made up resistance AND reactance, reactance is inductive or capacitive in nature. Have to attempted to adjust the length of the antenna?
@OregonDX Жыл бұрын
@@TheSmokinApe Thanks for the reply. Much appreciated. The only tuning I have done to the whip was during the initial sweep with the analyzer. It is honestly kinda narrow banded. So I trimmed it to reach the lowest overall SWR on the 40 channel spectrum.
@turimaki29382 жыл бұрын
I bought a Bearcat 125AC hand radio, live in Orlando FL (Orange County). I need an antenna that will allow me to listen to FIRE/EMS in case of Emergency power outages. Can someone help me chose an appropriate antenna??
@TheSmokinApe2 жыл бұрын
I have been really happy with Comet and Diamond antennas, just make sure you get them from a reputable dealer.
@thomassecurename31528 ай бұрын
Given a 50 Ω transmission line matched to a resonant and radiating antenna; can the antenna be thought as acting as an impedance matching device to space impedance 377 Ω ?
@TheSmokinApe8 ай бұрын
You would need a trans match between the transmission line and the antenna 👍
@thomassecurename31528 ай бұрын
I find it both interesting and curious no one thinks of an antenna as an impedance matching (w/ transmatch).
@TheSmokinApe8 ай бұрын
@@thomassecurename3152 it’s because you will get the reflection at the feed-point, if you add the trans match it’s handles the reflection for you
@thomassecurename31528 ай бұрын
@@TheSmokinApe Thank you. fm W7TOM
@BLUESKYS4EVE2 жыл бұрын
I own a NanoVNA. I still have not mastered it.
@TheSmokinApe Жыл бұрын
Howdy Blue. Here is my playlist for NanoVNAs, it should help you out. The more you use it the better you will get with it. NanoVNA Playlist kzbin.info/aero/PLm8ROkpFeqornjIRLKS0RJqSrUl_lr5lv
@tobiasgertz78003 ай бұрын
None of those circles are concentric. None of them. None of them share a center. Not one.
@lomgshorts38 ай бұрын
SWR means nothing but an indication of power transfer from feedline to a dipole !!! Does other Hams hear you ??? Then the antenna WORKS ! Anything less than a 3:1 SWR is an efficient power transfer to the radiating elements. END DISCUSSION.
@TheSmokinApe8 ай бұрын
I admire your convictions...
@Siskiyous62 жыл бұрын
Ape splainin at its finest.
@TheSmokinApe2 жыл бұрын
Lol, thanks LC 👍🍻
@chrisfossan20892 жыл бұрын
Great explanation, would love to see one on smith charts!
@ejdiii3334 ай бұрын
To much yak, not enough facts....get to the point.
@TheSmokinApe4 ай бұрын
You'd still miss it...
@victorb22622 Жыл бұрын
I want to email you sending some screen shoto if vna smith chart of my SlimJim and need to ask some questions.if you didn't mind,can u have your email id please?