Видео

can't you just build a vertical collinear antenna with some solid core coaxial wire and the length you need?

My long VHF marine is a little simpler with the brass coax.

By the way, about the wider diameter metal tube, which is soldered at its top to the inner tube... I don't think it's only structural. That to me looks like a sleeve balun. The length should be around 1/4 of wavelength, but I haven't found good information in the traditional sources about the diameter. The antenna looks like one of those vertical dipoles, where the shield of the coax was loosened and folded back on itself, expect that in this situation, instead of folding the coax shield, they used the bronze tube. Issue with this type of antenna is that there's no clear differentiation between the point where the bottom half of the antenna ends, and the regular coax shield begins, so you can get common-mode currents on the outside of the coax shield. The sleeve balun there presents high impedance to those common-mode currents, and provides a point where the coax ends, and the antenna begins. The downside of that type of construction, is that the balun is only for one band, and the balun itself is hard to tune to lower frequencies, since you'd need to make it longer.

Hahahaha wonder who he's trying to mimic? 😏😂😂😂😂😂

This is the same as a coaxial half wave antenna with the added half wave section that's loaded . so it becomes coliner gain antenna

Beautiful antenna . Did you know you can soften epoxy resins with heat ? Yes you can actually heat up that fiberglass to aluminium base with a electric heat gun and easily remove it therefore you can repair the antenna without destroying the fiberglass pole . That pigtail hanging off the side is a tuning device , there made open or shorted to help the filtering

Dear colleague, first of all I want to introduce myself: I am Carlos Valero YY5CAV, I am writing to you from Venezuela, South America and I want to thank you immensely for publishing this video where you show the inside of a Marine VHF antenna, it should be noted that I am repairing a similar antenna for a good colleague and friend Rafael Rodríguez YY5RJR who has an apartment on the beach and belongs to a water rescue group, days ago they gave him a fiberglass antenna very similar to the one you show in your video. At first glance it looks like a J Pole, but it makes me doubt because there are two bronze alloy pipes, one shorter than the other and inside it the piping or center of the coaxial cable. Regarding the problem of your condominium, I would take advantage of the antenna cover that you took and inside it I would place a J Pole dual band VHF/UHF antenna manufactured by you with 300 Ω flat cable for the amateur range, colleague, I say goodbye thanking you again for posting that video. Success with your projects.

0:06 😂😂

Did they use an alupex pipe for the outer cover?

Had to bail because of the shaky camera.

I would love to reverse engineer this antenna. Did you ever take any precise measurements or make a parts list? Looks like the coils at the top are some kind of RFI choke. It would be really cool if you made a parts list with measurements for this antenna. Maybe count the coils awg wire (stranded or solid) and diameter of the core and material. Diameter and length of sleeves. If you still have this antenna I would really appreciate it if you could. Maybe put a parts and measurements list in the description of your video. I am reading about sleeve antennas to try and make one like this. If you made a parts list with details it would save me a lot of time :) ;) LIKED AND SUBSCRIBED! Thanks for the video.

It's a stacked collinear antenna (multiple wavelengths stacked on top of each other to produce omni-directional gain). The little braid section is probably a tuning stub. I have a similar marine antenna but the coax is damaged near the base of the antenna. I wonder if there's any way to get the metal bottom section loose (perhaps with heat?) to solder a new coax to the antenna?

Budgie Budgerigar Parakeet

thanks man !

At least he says excuse me.. My African Grey doesnt.

I tore apart another broken Shakespeare 6dB antenna and all I saw inside was coax running up until it was only 2-ish feet of center conductor with the dielectric at the top. This one obviously has way more to it.

For cryin’ out loud, it’s not THAT funny.

Knowing the youtube algorithm, this should be recommended to everyone soon

Is it actual bird flatulence, or the bird imitating a fart?

Try putting your phone on a tripod so you don't shake the phone while laughing next time.

He did not

😂 ❤️❤️❤️❤️❤️

my friend how check antena by multi meter value showing ohms kilo ohms mag ohms or not showing any value

I thought birds didnt fart

It's one of those funny moments that has this positive feedback loop of laughter. I love it.

The first step is to measure everything as accurately as you can and then see how the various lengths relate to the wavelength it was designed to operate on. How long is that piece of coax that doesn't have a jacket, only the braided shield? Also, before trying to convert to 2m, see if you can get it to work on 156.8 with a low SWR. Once you have it working on the high end of VHF high, in the marine band, then you will be in a better position to retune it. Each section of the antenna will need to be lengthened a bit. At 156.8, VHF Marine channel 16, a 1/2 wave is 2.98 feet. If the antenna were to have 3dBd of gain it should be a bit longer than 2 half waves, around 6.5 to 7 feet. For 6dBd of gain you'd be looking at twice that or about 13 to 14 feet or a bit shorter depending on how thick the conductors are and how much spacing between half wave elements they feel is necessary, if any. The ARRL antenna book describes dipole arrays used in VHF and UHF antennas and will give you some info on spacing. Catch you on 625. 73 and have a nice day, thanks for the video.

If you want better vision tske vitimin a its not going give you back your former vision but it will improve your vision

The bird imitates what he hears

Love it

The fart was funny, but your laughing got me laughing till tears fell. Good job...we all need to laugh. Thx

It wasn't the bird who farted but the owner.

0:05 *FART* excuse me

I hope he doesn't die from toxic gases, since he probably is just imitating sounds around him!!!

Her laugh is so contagious.

Ah did Stewie just say excuse me , mummy got me creased up she's making me laugh with her. Cutie pie Stewie more polite than humans. Love from UK 🇬🇧..

Her laugh is making me laugh

Love how he says "Excuse me" - a classy little gent! 😄

😂😂

2020 anyone

🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣💛💜💛💜💛💜💛💜💛💜💛💜💛💜💛💜💛💜

That sounded wet

Rofl hold the. Camera still!! I cant stop laughing! Thats a precious lil budgie

Nanti ikan langka punah loh

that bird just made her day

I’m going to like 1000 times 🤣🤣🤣🤣🤣🤣🤣🤣🤣😂😂😂

Regardless of what age one is... farts will always be funny, except for those silent death bombs.

Fart Excuse me

Shit

Someone must be farting next to Stewie a lot.

Ahahaha