A Nice 2 4 GHz Wifi Collinear Antenna Let Down By Poor Coax

[@belliduradespicio8009]

Wow. I got two of these, i knew the long spindly coax was going to be bad, but not nearly THIS bad. Guess i'll get to cutting and crimping! Amazing channel andrew, i've learned more on your channel in a few hours than days and days of googling for information.

[@BenjaminHari]

Doesn't surprise me. These coax cables were always shite. But also want to say it's nice that you're back uploading the videos, it's always nice seeing you doing these little experiments with Wi-Fi gear .D

[@jamesbennettmusic]

This answers the question I was asking myself yesterday, on the search for some thin shielded wire, when cheap antennas with a cable were £5 and the same length of coax on its own (with connectors) was £18!

[@alanb1935]

Shortening the coax made a vast improvement to the reception on my Huawei B525 Router No need for an SMA connector On the base of the antenna is a rubber washer, its impossible to see the join, so use a Stanley Knife (or Minature Hacksaw)to prise it off Then prize out the metal cover on which the 1 cm wide magnet is attached The coax inner core is "soldered" to the base of the antenna, the braid does nothing Cut back coax and re-solder I reduced the coax lenght to 6" enough for the SMA connector to screw in the rear of the Router Reducing both cable lenghts now instead of a 4 bar signal it gives me the max of 5 bar Cost = 15 mins of time

[@youpattube1]

At 7:30 he says the signal is boosted to just over 200 mw of power, then he says it's 2.622 mw. Just ignoring what he is saying, if the meter shows 6.4mw after a 3db attenuator, the the power TO the attenuator is twice that (a 3db attenuator reduces the power by half), or about 12.8 mw. The coax is lossy, but he seems to be completely lost in his units.

[@johnsitjar4521]

Good day sir,do you have a teardown for the bottom part of this one? I just need to see the setup. So that I'll know where to solder the wire that was removed.

[@freefilms10000]

yes, quite, wish Andrew would reply

[@flipcrash8537]

I have the same antenna I purchased to boost the range of my rc transmitter when I fly while sitting inside my truck. Even with the antenna on the roof outside of the cab the range was worse than when using the stock internal dipole antenna while sitting in the driver seat. Now I know why. Thanks!!!

[@Funibert-Fox]

Hi! Could you send me a link to a shop where I could buy the antenna, please?! thx and cheers!

[@flipcrash8537]

@@Funibert-Fox www.banggood.com/Wholesale-RP-SMA-2_4GHz-7-DBI-Wireless-Wifi-WLAN-5-X-Range-Booster-Antenna-Extender-+-Base-p-45488.html?p=GE28217089006201610B&custlinkid=17345

[@flipcrash8537]

@@Funibert-Fox also you can peel the black plastic sticker off the bottom and pry the mount apart so you can desolder the coax instead of cutting it. Message me if you have trouble.

[@Funibert-Fox]

@@flipcrash8537 Thank you so much.

[@vinncentmelquiadesleviatan4291]

hello Andrew ... already visit the link that you left, I am interested in the antenna of the video, according to 1.60 euros ... but it does not appear in the available 4 items. Thank you.

[@cees1910]

So the question is then what is a very. Good coax then? Good video. Learned a lot

[@gammaleader96]

Hi, for lower frequency stuff (below 8GHz or so) I recommend RG402 or maybe some rg316 for even lower frequency stuff. For even higher frequencies or if you need very low loss RG213 or even better RG393 works pretty good but nothing can beat some rigid coax cables. (The Aircell 5 or 10 series of cables is also pretty good if you need some decent cable for a good price.) Regards,

[@krystof68]

THANKS Andrew

[@dionisiojulaton4128]

Hi Andrew there is a new antenna by IB CRAZY it is called pepper boxes extreme , may you please make one or make a replicate it. It is like crosshair antenna but more efficient . Pls. Reply , I will wait your video making the pepper box extreme thank you and God bless.

[@erniestory7223]

It's a mag mount got to be ground planed no wonder it's not working had these on the taxis went for miles mate

[@freefilms10000]

Andrew I understand from CB aerials that the coils were just to shorten the vast length of the aerial and detracted from the signal a little. This surely does not matter on 2.4ghz. Why don't you try to uncoil the one you bought and make a straight rod of it, with your better coax?

[@MrCircuitMatt]

I have two questions on this: (1) When discussing your measurement setup, you say that you are getting roughly 200 mW out of the amplifier, then you say it's 2.662 mW. Then with the 3 dB pad you measure 6.37 mW, suggesting that you really have somewhere about 12.74 mW of power out of the amp... how do those figures fit together? (2) with the coax but no attenuator you measure 3.6 mW, suggesting that the cable has approx. 5.5 dB of loss. However, when you do the scan with the modified antenna, you see e.g. Wifi_Repeater at -54 dBm and VM1075635 at -82 dBm. The extra coax should knock Wifi_Repeater down by 5.5 dB to -59.5 dBm, still more than 100 times stronger than VM1075635. Yet Wifi_Repeater (or any of the similarly strong stations) is not there in the first scan with the unmodified antenna. Any idea why this is?

[@petechongy]

Rx isn't as effected as tx over any length of coax on any freq it's just the higher you go the worse it gets and at 2.4ghz there is no low loss coax at these freqs it's best to keep the coax length as short as poss as for the other signals he picked up there so weak that the reduction of signal through the coax was enough not to pick them up that's all.

[@thomass.knutsen2487]

@@petechongy if RX isn't affected the same as TX, then your coax violates the 3. law of thermodynamics!

[@MrCircuitMatt]

OK thanks for your response but you're not really addressing any of the questions I asked, which are about the actual power figures mentioned in the video. Of course there's less loss in the system when the coax is removed but that's not what I asked. Also, your statement about RX and TX being affected in different ways by the TL is very, very odd...

[@MrZerohour1967]

@@petechongy loss is loss.TX/RX both 100% affected equally.

[@MrZerohour1967]

@@MrCircuitMatt You're very polite, I wouldn't call it odd, I'll call is BS :)

[@RaffaelloKWOS]

I tested also the S11 of that antenna with and without the RF cable: it's not good at all! I tested also the dual band version. Mine home made is much better. The internal braid of the RF cable is not welded and is kept wedged in the metal that holds the magnet, this creates bad adhesion. I think black paint also generates some tuning problems. I have not tried to sand it. Obviously, this type of antenna needs a very good ground plane.

[@petechongy]

Con olier Lolol made me giggle that did.

[@THISLOVETHISHATE99]

yay more videos though i still want too know what are ur thoughts on using a bi-quad yagi on a $20 netgear usb wifi adaptor

[@sandeepnaik6818]

Can you make a _#dedicated__ video_ on *importance of grounding antenna*. Thank you

[@freefilms10000]

yes, quite

[@dhanjaylaudencia2691]

Hey can i use it on medems?

[@miteshdhanani]

As it is nice but what’s the gage of the wire

[@johnwilkinson5584]

Hi ive just watched your video and found it very interesting, i have a bit of a problem i am trying to find out what I need to pick up free wifi on the caravan site,can it be done if so what do I need hope that you can help me with this regards John

[@sainisarit]

so what we do to increase the length of cable for antenna??

[@ahmednegm4589]

My teacher, I see many devices from the search for gold depends on the wireless and the search for the frequency of gold Is it possible to explain the antenna used for thi

[@ВасянНирванов]

so what actual RF cable did you used?

[@WillBaker-pl2wv]

I have a passion for learning about unseen forces like the frequency band. Ive tried for years to get even a basic understanding as I require visual info. Can anyone help me? I need visual information.

[@jejeroy]

Hi i have a question for you i bought a package of 4 of theses antenna i modified my routeur to have some rp-sma femelle connector i have 2 connector for the 2,4ghz and 2 connector for the 5ghz but there is like 6 feet of cheap wire on those antenna do you think that i should try to modify those antenna or it would be better to simply get reimburse are those antenna are really capable of doing 9 dbi ?

[@mikey_t295]

Many thanks after seeing this informative video iv just cut my crap cable down to match yours .

[@Billy-rr7re]

any idea where to buy quality wifi and lte antennas?

[@Funibert-Fox]

I can't find these antenna. Any links from somebody?

[@seldrick6717]

what is the wire u use on this wifi

[@owenkilleen]

Thank you :)

[@gideonlarbi9119]

Hello sir, please make videos of modified antennae for smartphones. please please

[@charlieoscar09]

Hi do you have a link to some good quality coax suitable for 2.4ghz thankyou

[@NeuronalAxon]

Low loss microwave rated coax. It's not cheap.

[@octapc]

Great video. Have you or can you do a test of various priced/qualuty ciax please? Then recommend a couple

[@yepperbgolley8215]

Exactly What's the difference in loss between good coax and the coax it comes with?

[@NeuronalAxon]

@@yepperbgolley8215 - MASSIVE difference.

[@QTMagic]

Do you have a brand of coaxial cable that you would recommend? The last thing I want to do is to desolder the current rubbish coaxial cable, just to solder on more cable which is just as bad!

[@pasindubandara9164]

rg 316

[@OutbackOntario]

what type of cable do you use? can you share a link?

[@buzzsah]

Andrew what program are you using to check antenna ? and adpt antenna to computer USB?

[@buzzsah]

Thanks, I've been out of it for a few decades just started up again in 2016.

[@andrewp1489]

What type of connector is between the antenna and the base? It doesn't appear to be SMA, but smaller.

[@andrewmcneil]

it's just a thread m3 if I remember

[@andrewp1489]

@@andrewmcneil Ok, I'm trying to figure out how to adapt it to an RP-SMA. Thanks

[@Igr-ic8qp]

whn I was king, one speaker si louder than other, after some time, I use multimetter and found higher resistance than 4 ohm from speaker.. I will buy this antenna and cut cable, then connect to wifi router. Thanks for video

[@mabbs2757]

Great video Andrew .. iam getting into long range FPV with a frSky 868 system stock TX antennas are crap can you build one PLEASE... Ps power output is variable up to 1W ...

[@robrow]

Brian Mabbett Frsky already make much better 2.4 antennas, a folded dipole for the transmitter and a dipole for the receiver end.

[@mabbs2757]

@@robrow it not 2.4 its 868 Mhz

[@robrow]

Brian Mabbett Yes, sorry my typo, they are 868mhz.

[@SuperCanuck777]

Penny pinching is the problem at these freqencies ....

[@aldrinvargas2593]

So what coax would you recommend

[@memeconnect7891]

you need a Discord Server :D

[@lenglor3310]

That's what I thought, itsway better then yours