Good video, great explanation. Truly it was so dang simple and obvious. I am mortified I never even thought of that at all. Thanks Dude!

@HAMRADIODUDE

2 жыл бұрын

Thanks much!

Thanks for this, is a simple but effective test before deployment and very well explained.

Great explanation, very helpful. I could not get my 49:1 to work correctly. I will try the resistors tomorrow and test it

Very well explained and illustrated. Thank you.

@HAMRADIODUDE

2 жыл бұрын

Thank you!

Thank you for making in simple. Iam a hands on person and this really helps

Don't know how easy that pen will be to clean off after a few uses but it definitely gives an "ooooh, that looks nice" feel 😊 Oh, and not forgetting ... the content was good too! Useful 👍

@HAMRADIODUDE

2 жыл бұрын

I think I'm getting new mat soon. This is currently a mat for arts and crafts 😂

Thanks so much for this really helpful tip. Brilliant.

@HAMRADIODUDE

2 жыл бұрын

Thank You, Paddy. It's proven to be a good method for me and seems to work okay to get in the ballpark. Have a good one!

Thanks for the information it was very helpful.

Thanks for the video dude! Very helpful this noobie!

This was a really cool video, thanks Dude!

@HAMRADIODUDE

2 жыл бұрын

Glad it could help

Good stuff! Gunna test my Ape-inspired 49:1 EFHW unun with this technique. Thanks for sharing!!

@HAMRADIODUDE

2 жыл бұрын

Excellent! Best of luck! Ape has a more technical video on this same subject, he released it about a month ago (didn't know before I posted). If you're interested, he goes in a bit more theory

@HAMRADIODUDE

2 жыл бұрын

Also, I hope you're well

You're killin me with the paint pen, dude! .. HA ... my youngest loved using a paint pen... was always nervous she'd draw somewhere she shouldn't Love the video... Keep doing what you do!! 73

@vne5195

2 жыл бұрын

Reminds me of the time I used a dry-erase marker to label hundreds of vials for a sterilization experiment prior to putting them in the autoclave.

@HAMRADIODUDE

2 жыл бұрын

I think the visual representation worked well... But yes, there's marker all over my clothes 😂

Thanks for the video, I have a balun that needs testing, and I just needed confirmation that my wacky theory of a test rig was right.

Fantastic vid. Thanks.

Thanks! Quick question: can you use an unun instead of a balun on a folded dipole antenna?

Did you use ordinary or low inductance resistors? Those can be hard to find, but the ordinary wire wound ones can give some bad impedance readings.

Great video. Just a thought..... get a 2 or 4 position rotary switch get a couple of female banana plugs get a couple of leads with a banana plug on one end, and an alligator click on the other get a small enclosure solder the switch input to one of the female banana plugs solder the resistors from each pole of the switch to the other female banana plug mount the switch to the top of the enclosure mount the female plugs one to each side close the enclosure label everything now you have a test box to switch from one set of resistor values to check your ununs

@HAMRADIODUDE

2 жыл бұрын

That's awesome!

Excellent yet simple description. Thank you for posting this video!

@HAMRADIODUDE

11 ай бұрын

Glad it was helpful!

Very helpful

Explained nicely

@HAMRADIODUDE

2 жыл бұрын

Thank you!

Good afternoon. I want to measure a 49:1 unun, it comes to be 2450 Ohms. Should I build a 2450 Ohm resistor for the test bridge or is the 470 Ohm resistor enough? Thank you Julio OA4DXW 73

Thanks dude!

Thanks for the Video Ham Radio dude

Is that an unun or an unbal? 1st thing that popped into my head when i saw it was to transform to 450 ohm was ladder line converter.

Please make a Video on How to test a frequency trap , good to be used with 49 :1 multi band LEF wire antennas

Tha is for this info!

Just had to do this with a bought 49:1 (cheap import) which just wasn't matching. Examination showed one wind too many on the primary! Took out a turn so it was 2 turns to 14 (rather than 3 to 14) and of course everything was fine. I used some resistors in series I had on hand to make the test load as near 2400 ohm as possible and my microVNA. - sorted.

@HAMRADIODUDE

5 ай бұрын

Excellent

HRD I'm wondering how long before some person acknowledgers my post? You asked if any person has new material and trying find out more.

It would be about a 2.4k resistor for testing the 49:1 it seems.

Getting a different impedance at higher frequency is not just a matter of the connector. The inductor itself behaves different at different frequencies, a function of core type, wire size, winding proximity, etc. A 9:1 transformer is not evenly 9:1 across all frequencies; whoever built it decided on a toroid and type, hopefully with an eye towards what frequencies it'll be used for.

I would solder, heat shrink and add alligator clips to your resistors for quick connect 👍

@HAMRADIODUDE

2 жыл бұрын

Great idea. I will! Thanks!

Excellent Dude ! No Bogus Baluns....lol

Does it matter what side you’re counterpoise and radiating element connect to and if so, how would you tell if you have one that is sealed up with no labels?

@Locksnut

6 ай бұрын

Generally the counterpoise should be closer to the SO239

Ham Radio Dude- just found your video, all good except i dont have an analyzer, what can use to substitute

@HAMRADIODUDE

Жыл бұрын

You could just hook it up to a radio and check the SWR. It's going to be painful and if you're not resonate within the bands you can transmit on, it's going to be very difficult to tune/confirm functionality, but it could be done.

So how do you test for loss ie loss of power output and rates of power ie QRP vs QRO?

@HAMRADIODUDE

2 жыл бұрын

This is a great question. It may be an answer for the smoking ape. Let me ping him

@TheSmokinApe

2 жыл бұрын

I would think the best way would be to perform an insertion loss test on a VNA doing a S21 LOGMAG, that said I am not sure I found a way to do this where I am confident in the results. Power level shouldn't matter in this type of measurement provided that the antenna is designed to handle QRO.

Has anyone tried a 49:1 ( tapped at 2 turns the normal way) and tapped off also at 6 turns to make a 9:1 on the same toroid? vk2jcc

Tnxs, how to find some ohms

@HAMRADIODUDE

2 жыл бұрын

Thanks for watching, Paul

how many feet of wire is a 9:1 unun happy with?

@HAMRADIODUDE

2 жыл бұрын

Hello. There's a good chart in the description of my video. I have used 37 and 44 ft with okay results. I was constricted with space. Best of luck

Doesn’t work this way with a 49:1. The secondary on a 49:1 is part of the resonant circuit formed with the end fed half wave length of wire. I tried this with 4 different 49:1 ununs and was getting a weird dip at 2.5 mhz and high swr in the rest of the band but when I connected my half wave wire, all the dips were right where they’re supposed to be.

@HAMRADIODUDE

Жыл бұрын

You're right. I confirmed the 49:1 with the same results. Sorry for the misinformation

@VoiceOverTrailReviews

Жыл бұрын

@@HAMRADIODUDE Thanks for checking and replying! It seems a lot of folks are misunderstanding the 49:1. I’m glad to hear I’m not crazy.

@HAMRADIODUDE

Жыл бұрын

I'd be inclined to say that since you see the dip, that's a good indication. If there's no dip for anything that doesn't come relatively close, that's where you start to see an issue with your wrapping or something along those lines. I think the best experiment would probably be to wrap it once, check wrap it twice check and see and watch what it does on the spectrum

@VoiceOverTrailReviews

Жыл бұрын

@@HAMRADIODUDE Just out of curiosity, what kind of curve did you see in your analyzer with the dummy load? I always get a dip around 2 to 5 Mhz and then the SWR is off the graph by around 14 Mhz. I've tried 3 different type 43 core configurations and always get a similar result.

If everyone would quit using the powdered iron cores that are designed for use as inductors in tuned circuits such as antenna tuners and low pass filters in amplifiers and transmitters and use ferrite cores like a mix 43 or mix 61 that are made to be used in baluns and ununs, the test results would be a lot better!

@HAMRADIODUDE

Жыл бұрын

Thanks.> If you would like to contact Princeton Antennas, that's who made this Random Wire 9:1. 73

@rickmckee6698

Жыл бұрын

@@HAMRADIODUDE Learn to build your own ! FYI, a 9:1 UnUn is designed to feed a 450 ohm load and a random wire is only going to be 450 ohms on one frequency!

Nice test, but I’m not going to go out and buy a $300 antenna analyzer to do this test

@HAMRADIODUDE

29 күн бұрын

I understand. You can buy a 30 dollar one (Nano vna or whatever). Cheers.

When I was a kid, my dad made contacts in many parts of the world either by voice or cw. The general impression I am getting from watching ham radio videos is that this type of activity is all but dead. Am I just not watching the right videos ?

This Old Tony?

@HAMRADIODUDE

10 ай бұрын

This Young Dude?

49- 1 60 of wire would work 10-40 yes

@HAMRADIODUDE

2 жыл бұрын

Hi Paul. a 49:1 with a T140-43 torroid can be used within the 80-10 range, yes. If you have a 49:1 with an antenna length cut for 1/2 wavelength (65.6 feet, depending on the wire you use (Velocity factory could play an effect and technically make the antenna a little shorter)) of 40m, you will get: 40m, 20m, 15m, and 10m, all should be without the use of a tuner. I have not attempted, but with 1/2 wavelength worth of antenna wire for 80m, you should be able to get 80, 40, 30, 20, 15, 12, and 10 under 2:1 SWR, with 17m possibly being slightly above 2:1. Thanks!

@paulhastings3109

2 жыл бұрын

@@HAMRADIODUDE tnxs Dude. It's hard to said where you are. Must be on Permanent vacation. Lol How everything is ok on your end, can't say that. My mind is like racing engine and the brakes are not working. Free wheelin. Trying to put together a go bag. G 90 Looking at the POTA There's a whole bunch down here in Florida, And I won't have fun.

@paulhastings3109

2 жыл бұрын

@@HAMRADIODUDE how do you know what torrid to use and how do you measure the impedance of your wire. Yes I should know that.

I'm here first!

Unun is unbalanced to unbalanced. Balun in balanced to unbalanced. 450 ohm line is balanced and 50 ohm coax is unbalanced. You have tested a balun not an unun.

@HAMRADIODUDE

Жыл бұрын

Thanks. Do you have any documentation that is easy to follow? I ask, because I am referencing websites and then I think I understand it; Then I find out, that about 90 percent of the websites out there are calling a 9:1 an unun... So if I had some documentation and examples of Balun vs Unun, I think I could make a video after understanding it better and hopefully help clear the confusion. Thanks for any resources you may have

@Yosemite_Sam

Жыл бұрын

@@HAMRADIODUDE Good job. The unit you made can be used as a balun with balanced 450 ohm balanced twin lead to feed a G5RV for instance. It also can be used as an unun with an End Fed Half Wave by attaching the antenna wire to one side and a counterpoise earth to the other side. Your videos have good lighting, good audio and contain good details so well done. Google is your best friend preparing these videos. So are other KZread videos. Plenty there to research. Keep up the good work.

*JAMAS MOSTRASTE EL PLANO DE CONEXIONES DE TU BALUN!!!!* *INEPTO!!!!*

@HAMRADIODUDE

3 ай бұрын

I'M SORRY, I CAN'T READ CAPS LOCK.

@quebienestabamoscuandoesta6004

2 ай бұрын

@@HAMRADIODUDE *You can't read capital letters, BUT YOU CAN WRITE THEM?????*

*Several minutes of video, and you never show the plan of what you did????INEPT!*

@HAMRADIODUDE

2 ай бұрын

In the video I show 450ohms crossed between the antenna element and the counterpoise. I did not show a schematic but rather explained it. I can draw it out if you would like

@quebienestabamoscuandoesta6004

2 ай бұрын

@@HAMRADIODUDE *In a tutorial on a balun, the logical and default thing would be to show the connection of the balun that you are still showing,* *((basic behavior))*

Fine business I ordered parts today for a 49:1 everything but the enameled wire ? Can i get by with insulted 14 gauge from say Romex KE4TDG. 73

HRD just a thought with the resistors in line, and a AM carrier of 5 watts, and a piece RG 58 as a coax capacitor, connected earth & wire connected to Aerial inside the box. Now CUT your RG58 , cut off small pieces of cable and have look at your VSWR in line ....the SWR going down and slowly I get a 1: 1 in the cable. Leave RG58 in box as you have soldered it. Give it a go mate Dennis vk4oc.

@HAMRADIODUDE

2 жыл бұрын

Thanks. Very interesting I'm going to have to give it a shot. Sorry for the delay. I see all the messages but I'm having a difficult time keeping up at the moment .. I'd like to try this to see the happens, I appreciate it!