Over 20 portable antennas tested - one outperforms all - SWR graphs

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Over 20 portable antennas tested - one outperforms all - SWR graphs - thoughts

Рет қаралды 1,343

Күн бұрын

Form & function are one thing, but horrible SWR can hurt your radio!
Tested 20 antennas, some I had multiple to see consistency, SWR and also used them to do actual QSOs.
Is there a difference between the same antenna with SMA or RP-SMA? NO, not on my test.
Not exactly the RH660S I bought YEARS ago but should be the same:
male: amzn.to/3FN1jNv
female: amzn.to/3Zb5RE8
please double check that the links are correct and you buy the one you need!
If you wanna support what I´m doing, the best way is via Patreon: / dm4ds
The smallest amount makes a huge difference for me!
Enjoy watching
Sandor - DM4DS
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Timemarkers:
00:00 what have I done :)
00:46 there is one outperformer!
01:15 explain SWR graph
03:36 Abree teleskop
05:18 Anytone 878UV2+ antenna
06:30 Baofeng UV5R antenna
07:40 Diamond RH901S
11:40 Diamond SRH805S
14:00 Nagoya NA771
16:09 another Nagoya NA771
17:35 Nagoya NA773
18:39 Retevis RHD701
20:36 Retevis RHD771
22:42 RH660S
27:55 another RH660S
28:30 Diamond RH771
30:30 Comparison all 771s
31:25 Unknown - help - comment
33:20 Male RH660S
33:50 2nd Unknown - please comment
35:15 phone ringing . love you mum
35:22 the show goes on
35:45 what I use
38:20 they are asking
#hamradio #portable #antenna

Пікірлер: 15

@vk5ukkklaus386 Ай бұрын

Thanks for your review of the antennas 🇦🇺😎

@orni747 2 күн бұрын

Hi Sandor. By 13:02 you was mention about DMA hotspot. What you mean about DMA Hotspot? I don't know what is this. Thank you for your explanation.

@digitalchaos1980 Жыл бұрын

As to the one antenna early in the video that claimed 300 MHz, the only use I could think of for that frequency would be for SATCOM uplink. They are in the 292 - 317 MHz range. Although, I dont know if that antenna would work for it or not. 😎

@DonzLockz Жыл бұрын

Good to see the test results. Some were very surprising to see. I have not seen that RHD660 before. Thanks for the info. Don, de VK1DON

@murray_n Жыл бұрын

Excellent! I was surprised by how well the stock UV-5R antenna performed. I wonder if adding a counterpoise makes it even better. Opinions seem divided on the matter. Any chance you could test that?

@DM4DS Жыл бұрын

I try to remember it the next time I'm running some antennas. In the UV K5 Video I already started to measure "grounded" and not "grounded" , while it's often asked. Thanks for the comment! Vy73 Sandor DM4DS

@rilosvideos877 7 ай бұрын

The Nagoya NA771 and also the diamond are probably fake antenna from china. There are a lot of these fakes around on ebay or aliexpress etc. They look similar but often the bottom part is a little different. The real ones have a slightly different printing directly at the bottom part. About the RH660S: how do you know the correct length for the band you use? SWR would change depending on the length of the telescopic antenna? Or do you measure it exactly each time you use it?

@mylesl2890 Жыл бұрын

very nice. tests. thanks, can you share your test. fixture with us curious how you measured the antennas?

@DM4DS Жыл бұрын

@mylesl2890 not exactly sure what you mean by share my test? They were measured on the Siglent VNA, the shield on the (RP-)SMA was grounded. The screenshots from the VNA, in SWR mode, are the pictures you see in the video. Maybe I don´t understand the question correct or maybe I answered it :) vy73 Sandor - DM4DS

@reinholdu9909 Жыл бұрын

Hi Sandor - lot's of work . Your AmazonAL gives at least 3 different RH660S. Differences? Which one to buy?

@DM4DS Жыл бұрын

@reinholdu9909 updated the description with links to both SMA / RP-SMA style RH660S - Not exactly the one I bought years ago but it should be the same. vy73 Sandor - DM4DS

@johnwest7993 Жыл бұрын

There was no info provided on the test setup, and since the whip on an HT is only half of the antenna system, (the other half consisting of the inductance and capacitance of the body of the HT and the person holding it, (in other words the test setup,) I don't see the results you obtained as being that accurate or meaningful. I'd probably have someone stand in a large open area with an HT and transmit a few second carrier on each specified band, (so as not to affect battery capacity,) with each antenna as you monitored the signal strength at a distance using a sensitive signal strength meter. The received signal strength will be a function of the antenna's impedance match to the HT as well as its gain relative to all of the other antennas. That would be a real-world, meaningful, apples to apples antenna comparison test, at least for that particular HT and person.

@DM4DS Жыл бұрын

Thanks for your comment. I'm testing with an old radio but instead the electronics, the analyzer is connected, antenna mounted and holding it like you would hold it during a QSO, everything else makes no sense like maybe GND free measuring laying on the table or whatever. This is SWR measurement, this is no free field signal strength measurement, should be clear and I never claimed. If you do such great tests, you say, it would be nice to see your videos. I'm sure the community would enjoy them. Vy73 Sandor DM4DS

@13EL121 Жыл бұрын

Deine Nagoya NA-771 ist definitiv eine Fälschung. Die originalen sehen anders aus. Keine blaue Beschriftung, andere Form des Spulenkörpers. Nagoya hat auf seiner Seite die Möglichkeit beschrieben die Fälschungen zu erkennen. Ansonsten ein tolles informatives Video. Hast ein Abo mehr. 😀 73!

@DM4DS Жыл бұрын

Danke für den Hinweis. Kann auch sein dass ich beide hab und beim testen sie in die jeweils andere Verpackung gesteckt hab. Über die Jahre haben sich so viele Antennen hier angesammelt :) vy73 Sandor - DM4DS