You made this so much more easy to understand than all the other "how tos" I've watched

@kentprepper6392

2 жыл бұрын

Thanks, just keeping it real, no nonsense, 👍

dipoles are great. i used a wire dipole tonight to talk 270 mile with 5 watts to some one in the Isle of Skye. it was on HF not PMR but radio is radio in my book and its all the same thing when you make antennas :D

Didn't need an antenna tuner? Unbelievable!!! I followed your steps, not sure if I just got lucky. The antenna is registering 1.2 SWR, you're a genius!!!

@kentprepper6392

Жыл бұрын

Your welcome, i only suggest what i know to be true, appreciate the kind comments 👍

@attilarivera

Жыл бұрын

well.. im gonna try it here. 🤔 💚🇧🇷

@user-em6vi6sj7p

10 ай бұрын

SWR means nothing, you can get a perfect 1:1 with a 50 ohm resistor

Absolutely amazing. I’m going to make it. Thank you.

Simple, easy to understand. Thank you!

@kentprepper6392

Жыл бұрын

Then my work here is done 👍 Appreciate the kind comments thank you.

Great vid thanks for making and posting 👍

Great video explanation, thanks man…!

@kentprepper6392

Жыл бұрын

Your welcome, appreciated the feedback thanks 👍

Great enclosures. But. Dipoles need 1:1 baluns. 5-6 turns of coax near antenna, and it will make greate difference.

@kentprepper6392

Жыл бұрын

Sound advice sir 👍

@user-em6vi6sj7p

10 ай бұрын

Forget trying to match a UHF dipole to Unbalanced coax, Baluns are for large HF aerials. make a 1/4 wave groundplane instead. a BNC flange mount panel socket makes a good base to solder 6 inch groundplanes onto. bent down 45degrees and it'll match 50ohm coax. instead of a dipoles 75ohm

@modellerdesign

10 ай бұрын

@@user-em6vi6sj7p you don't get a point.

hi, Rick here from brunsick ohio, i must say, your brilliant mate!

@kentprepper6392

Жыл бұрын

Thank you for the kind comments sir 👍

New to this hobby and new to this channel, a most excellent tutorial on creating this dipole! I wonder, being a total noob, would the reception/transmit be hampered if the 2 elements were completely enclosed with pvc pipe and pvc endcaps? I just thought it would be cool and mysterious to have it set up like that🙂 Gratitude for your work here, much appreciated. Subscribed!

@kentprepper6392

2 ай бұрын

Should work fine if inside plastic pipe 👍

P/s also you might want to concider RG-8X cable it has much loss

Can u post a link for the coax connections please? Thanks for the great idea and the video

I have some copper tube here that's designed for brake pipe. I made this today but even up on my roof I got nothing on my Baofeng. Is the copper pipe ok for this? Need to check if I got anything wrong but pretty confident it's built to spec

@kentprepper6392

5 ай бұрын

Ive not heard of copper/zinc (brakelines are copper/zinc) being used before, i would remake using steel rods.

I gave this a like, BUT the one problem I saw with it was how you skipped over how to connect the coax to the "CB connector"

@kentprepper6392

Жыл бұрын

It is connected exactly the same as a CB PL259 plug ie soldered in place, apologies for missing that bit.

@kentprepper6392

8 ай бұрын

My apologies, i was filming using a phone so was impractical to film that bit at the time, tho i do show what it should look like so people can figure for themselves, thanks for pointing this out tho 👍

Nice and smart idea! Did you check your diy dipole against a Nagoya NA771 or similar? Would be interesting to see if there is any big difference in operation? Also how would it behave on 2m Band?

@kentprepper6392

7 ай бұрын

Far superior to the 771, not used on the 2m im afraid.

@rilosvideos877

7 ай бұрын

@@kentprepper6392 Thanks - sounds great! Could you specify 'far superior' just a bit? 🙂

@kentprepper6392

7 ай бұрын

@@rilosvideos877 the 771 adds 5-8 miles radius, the dipole adds 40+ miles radius.

@rilosvideos877

7 ай бұрын

@@kentprepper6392 Thanks! Thats incredible! Have to try that 🙂

Hi I'm TB2SEF QTH Kocaeli, TURKEY. Thank you friend 73!

2 x quarterwaves making a halfwave 75 ohm dipole at 446MHz are each 6 inches long

New to radios. I was all good until the end. How do you connect the coaxial to the "T" connector?

@kentprepper6392

Жыл бұрын

The coax would be soldered onto the plug that connects to your radio, in this case the T connector was simply to demonstrate, sorry if i wasnt clear! 👍

@nagaviper1169

Жыл бұрын

@@kentprepper6392 Thank you

@nagaviper1169

Жыл бұрын

@@kentprepper6392 Thank you

Do you need to take it down when it rains? I'm a new ham but I thought water in coax is a problem and I live in a wet environment. Would it work ok if I taped the coax and filled the PVC with epoxy? Thanks forgive my ignorance Im about to take my technician test and want to build my own antenna for my uv5r to learn. God bless

@kentprepper6392

5 ай бұрын

If protected from rain then will be fine, Check periodically to see if any corrosion occurs.

@vtechead1

Ай бұрын

Leave a hole in the bottom of the antenna so any condensation can drip out. 👍

Really interesting and simple project but I was wondering why 70cm, I always saw about 49cm for 2m dipole

@kentprepper6392

8 ай бұрын

70cm was suggested for a PMR dipole, it works very well.

Sweet Antenna, But It Would Be Much Better If Everything Would Be Made Out From The Copper, I mean The Elements N Stuff

Good job looks very simple I know it will work because I am K1emw

It will be okay for rx but I believe that some kind of balun is necessary because coax is not balanced and doesn't match the impedance or something like that, I'm no expert. There's vids that explain better. Also the swr should be checked or you risk frying a 20 quid Chinese radio. 😄👍😎

@kentprepper6392

Жыл бұрын

Its all for emergency use only, i demonstrated how to make a usable antenna, it works out to 40 miles rx and tx, its worth risking a cheap radio (of which i have several) in order to experiment 👍

@techtinkerin

Жыл бұрын

Fair enough, find out during an emergency when swr cooks components.

@jamesvw769

Жыл бұрын

@@techtinkerin RELAX...

Show me how it works...how far will it go?

@kentprepper6392

9 ай бұрын

40 miles as a rule using a uv5r.

Can a dipole antenna be used or optimized for 915 mhz? If so how long would the rods be?

@Trump2PrisonOn34Counts

7 ай бұрын

If I have it right, it's as below. The fastest way to get the correct answer on the internet is to post an inaccurate one! :) 234 divided by the frequency in Mhz times 12 for length of each element in inches. 234/915=0.225 X 12 = 3.06 inches for each element. Or 6.12 inches total, tapped in the middle. I've seen people put a 1:1 blun in as well. Also try vertical and horizontal orientation and use a non-conductive support (Wood, fiberglas) to hold the dipole.

Nice.

Maniküre wäre nicht schlecht!

@kentprepper6392

27 күн бұрын

Im a Landscaper by trade, rough hands are a standard feature 😊

@hgolimart7512

27 күн бұрын

@@kentprepper6392dennoch kann man anständige Fingernägel haben…

What coax did u use and how do u put connector on the radio end of the cable

@kentprepper6392

Жыл бұрын

Hi there, first fit a SMA FEMALE to S0239RF UHF PL259 SOCKET in place of the original antenna (ebay about £5), on the coax end just an ordinary UHF PL259 MALE (ebay about £3) try to use at least RG213 LOW LOSS coaxial cable (ebay).

@AM-zt3xe

Жыл бұрын

@@kentprepper6392 thanks dont suppose u want to do a updated video and more in depth like showing fitting the connectors to cable ect 😂 thanks for the info

@MerkinSniffer69

Жыл бұрын

@@kentprepper6392 would Coax with Aluminum coating work or is copper coated the best option?

@user-em6vi6sj7p

10 ай бұрын

@@kentprepper6392 a PL259 might be called a UHF connector but its useless at UHF use a N type

👍

Buy a small camera stand chev, it’ll be much better for you

HI there, newb here. I have a UV-82 and use freq 477 how do I work out the length for that?

@kentprepper6392

7 ай бұрын

Each element should be 6.3 inches, there is an online calculator for dipole lengths.

@jeffcameron7853

7 ай бұрын

Cheers mate@@kentprepper6392 I'm off to buy some parts

Any grounding needed in case Lightning hits it?

@kentprepper6392

Жыл бұрын

Its designed for handheld use so the user would be the earth/ground, standard procedure is to unplug external antenna if lighting is forcast.

@IniguezFamily

Жыл бұрын

@@kentprepper6392 ok, got it!

Unrelated, which Bergen was that? 🤘

@kentprepper6392

2 ай бұрын

British army 120 litre bergen.

@OldNavajoTricks

2 ай бұрын

@@kentprepper6392 which particular I meant, top flap looks old and the glimpse is brief lol, mines a modified Longback and iirc the tag was '04 on it so newer than yours I think.👍 and thankyou for the reply.

F adapter connector, chunk of television coax, knife, go.

Can I use wire instead of metal elements as long as it's 70cm long either side? Would be used on the baofeng GT-3TP.

@kentprepper6392

2 жыл бұрын

I have heard of wire being used, its best you try both, it is a 'try and see' type of hobbie, do both andcsee what works best for you.

@davidhooper1767

2 жыл бұрын

@@kentprepper6392 ok thanks.

@wowsly

2 жыл бұрын

@@davidhooper1767 you van use wire. the thicker the better. gt3tp is a great hand held. had one for years and still love it. wire dipoles pack down smaller and work just as well :D i made a wire one like this for another band and works well with a washing line peg to clip it to stuff

@davidhooper1767

2 жыл бұрын

@@wowsly How long are each elements.Ive seen some that look quite small but others look longer.

Could/would this work with the GMRS version of the UV5R?

@kentprepper6392

2 ай бұрын

Yes no problem

Can I just use coat hangers?

@kentprepper6392

Жыл бұрын

Yes, bare wire coat hanger works well 👍

How about the 50 Ohm

Anyone know how long the Elements need to be for GMRS in USA ?

@bitemykrank1970

2 ай бұрын

For a centre frequency of 464Mhz, the middle of the GMRS band in the USA, each element would be 15.372 cm or 6.052 inches long. The length ISN'T hyper critical, if you made it 6 inches long, it would change your centre frequency to 468Mhz. You'd still get a usable SWR at 462Mhz, which is the bottom of the GMRS band. I wouldn't use steel rod though, as it's fairly poor in it's ability to radiate RF, use copper tubing or aluminium for the best results, but cheap welding rods work very well aswell. Make it, try it, remake it, until it works.

what connectors are you using,dont look like n

@kentprepper6392

2 ай бұрын

The plug is a PL259 that connects to the adaptor on the radio.

So, I screwed up on the math converting centimeters to inches and cut my wires exactly half of the 70 centimeters. What effect will that have on the radio?

@kentprepper6392

Жыл бұрын

The wavelength is bigger than the antenna length so the antenna won't 'hear' the signal sent on 446mhz the 70cm is half (or a quarter) the lenth of the of the signal wave.

@jacksjaunts8580

10 ай бұрын

On 446mHz a 70cm long antenna is 3cm longer than the full wavelength (speed of light/frequency, it’s about 67cm). A bit shorter or a bit longer takes your resonance up or down. Just make yours a half wave dipole, it will work just as well though you will need to wind the coax around the pipe tightly to choke off common mode current common on half waves. Either that or get bigger rods.

how is the impedance ??

@kentprepper6392

Жыл бұрын

Its a prep tool, just needs to work well, after thoughts like impedance and SWR are elementary, but on saying that its been connected to a uv5r for about 2 years and all is still well.

👋🏻👀👍🏻

Where can you get the wire and what gauge is it??

@kentprepper6392

2 ай бұрын

The coax used in the vid is RG23 but for UHF446 I recommend WESTFLEX 103

@GMAGPIE1960

2 ай бұрын

What length of coax do you need to make the antenna??

@kentprepper6392

2 ай бұрын

The length of the coax is determined by how far the radio is from the dipole/antenna

Not meaning to rain on someones parade but that qould only be good for an inside antenna only because if water gets inside the coax the coax becomes junk and if anything a dipole is fine as long as its vertical but making a ground plane id much better by 1db of gain over the dipole and more broadband

@kentprepper6392

Жыл бұрын

A rubber cap that slides over the top rod keeps all water out 👍

@archer1483

Жыл бұрын

Yeh! Seal it up then.....duh

Poderia nos passar as medidas

How many watts can it handle?

@kentprepper6392

7 ай бұрын

I use 15w max

@jziadj

7 ай бұрын

@@kentprepper6392 If you use 50 watts there will be swr right?

Its not top for tx and bottom for rx....the are both needed for both

@kentprepper6392

9 күн бұрын

Thats a negative sir, the top is transmit, The bottom is recieve, they are a separate function.

@nickaxe771

9 күн бұрын

@@kentprepper6392 Sorry Sir.....but that incorrect....but its no big deal.

Gtrat built can you use rg 6 coax

@kentprepper6392

8 ай бұрын

446 vhf has a high loss with thin coax, rg23 at a munimum but 000 lowloss is best.

@bobbygreen6670

5 ай бұрын

​@kentprepper6392 is if you was to use rg 6 coax what would happen still very next to all of this

@kentprepper6392

5 ай бұрын

Unfortunately rg6 and rg23 are high loss when operating in the 446.093mhz range, better off with 000 low loss coaxial cable, the best you can afford.

Hi . In fact i do not know how to explain my point of view from a scientific perspective. My name is Sasa and I work in electronic circuit maintenance and design. From my scientific point of view, all antennas have a certain resistance, and this resistance is measured on an Avo meter(Ω) . A is amper V is volt O is om (Ω) . see here just two metal skewers. The thing that caught my attention was why I connected the body of the device to a metal skewer and the signal output to another skewer? What is the relationship between the body of the device and the transmission and reception? It is scientifically known that any body or structure of any device belongs to the Earth. Grounding. While you relied on it here for the transmission power, this does not make sense at all. The correct antenna contains, for example, a certain number of copper coils and a lenticular capacitor to filter out stray electricity, in addition to the length of the antenna. The sum of these things that you mentioned is the task of dealing with specific frequencies that are transmitted. Or receive it. As for what I see here, it is just a mockery, and the device’s output IC may be burned after a short period.

@kentprepper6392

7 ай бұрын

A very indepth analysis, i too am from an electronics background and i have learned that not everything that is written is entirely true, the simple dipole here works great and these are made at home by radio hams and enthusiasts for 2 reasons, firstly its extremely cheap to make and secondly it works great too, although i appreciate technical jargon the case remains that simple works well too.

@sasa-qq9em

7 ай бұрын

@@kentprepper6392 Dipole antenna. you are right. I have also seen many people making this antenna on KZread, and it is a very successful method. Thank you for your interest