SIGMA AM-PRO mobile monoband whip antennas (review)

Рет қаралды 13,038

4 жыл бұрын

Sigma AM-PRO is a series of the HF monoband mobile antennas for 80/60/45/40/30/20/17/15/12/11/10m bands. Maximum power handling is 250W and each antenna consists of 2 parts - resonator and radiator with total lenght approx. 2,4m (its 8ft), sorry for my mistake in the video. Uses 3/8in stud mount.
- link for this webshop(currently offline): sigmaeurocomm.co.uk/
- similar MFJ products here: www.moonraker.eu/mfj-1620t-20...
- also here: hamradiostore.co.uk/search/?q...
- and here: www.americanradiosupply.com/p...
My equippment:
- antenna analyzer: MINI1300 www.aliexpress.com/item/40004...
- transceiver: XIEGU X5105 www.sinotel.co.uk/index.php?m...
MUSIC in this video:
5:03 / 13:33 / 19:43 / 21:19
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13:33
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Track: Safari - Declan DP [Audio Library Release]
Music provided by Audio Library Plus
Watch: • Safari - Declan DP | F...
Free Download / Stream: alplus.io/safari
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#SigmaAMPRO #mobileantenna #review

Пікірлер: 69

@enigmarbs2886 4 жыл бұрын

Very nice presentation, Pavol. The monoband whips doing an good job. But it's not ideal, to operate 40 or 80m on an magnetic base, because you will have no good grounding to your car body, that's maybe the reason, your swr changing, when you touch the connector. Try to put an grounding cable to the ground of the base and connect a short cable to the screw of the passengerhandle. You can put an AndersonPowerpole on it to separate it, when you dont have your antenna on the car roof. I think, the second graph on the mini1300 is R, the real impedance and the third graph is Z the imaginary impedance part and the forth function is the smith chart. Have fun with your mobile configuration. 73 de Stefan DG4RBS

@sebastianwojdyla4735 4 жыл бұрын

Tatiana did a great job helping dad, great antenna test Paul... Greetings from Poland. 73

@OM0ET 4 жыл бұрын

Thank you! Yes she helps me a lot 😉👍Greetings and 73.

@markg6jvy135 4 жыл бұрын

I have the 40m version Paul (think they’re manufactured no too far from me) and overnight on roof of my car made several contacts to the USA on WSPR with just 200mW power. Great video, and even better camera work 👍

@OM0ET 4 жыл бұрын

Great! So I am happy that this antennas will do a good work for me to the future :) Nice, USA with 200nW :D gj! Thanks for the nice comment :) 73, Paul.

@studiobrill 4 жыл бұрын

XLNT and interesting vid. Quick deployment and will be great checking out some high places.

@W-733_KWX 3 жыл бұрын

Paul, these are great antennas, I made nice contacts on 40m and 20m, never had a 80m whip ; I was just thinking if you can park your car far enough from trees, you could take say your 20m antenna bottom, then screw an antenna wire to go in a sloping position to a tree and find out the right length to be resonant on 40 and 80m. Even more: you could take the 80m whip and make a wire extension to have 160m band ! 73 QRO from ha7wx chris

@berndb.5097 4 жыл бұрын

With this type of antenna I unfortunately always had problems with a good ground connection. The magnetic base is also just a bad compromise. I mount the antenna on my trailer hitch with an antenna base which also has a direct connection to the car chassis (shield). So far, that worked. Another improvement was the use of a shunt coil. With this I was able to set the base point resistance to match 50 Ohms at the resonant frequency.

@RonanCantwell 4 жыл бұрын

Some clip-on ferrite cores on the coax as it leaves the magmount will help a lot. Also, the other design of this antenna as sold by moonraker is MUCH less bother to assembe/disassemble - you only need to set those fiddly little allen grub-screws once. Have a look at how it differs from these.... Still loving the X5105 👍👍

@xszl 4 жыл бұрын

We used to put our mobile antenna's as far as possible to the back of the car. That way you get a more directional antenna and you can point the car to your favorite direction.

@OM0ET 4 жыл бұрын

Thank you! ;)

@W-733_KWX 3 жыл бұрын

You presumably were in the afternoon, so indeed only local NVIS is possible on 80m and it's better to use a dipole low over the ground (D-layer absorption will take all your vertical signals' energy); I had great success with a dipole at something like 6m high and 10W (transmitting all over Hungary no min distance and circa 250 km radius). You should try if you still did not, that's fun! With a vertical whip, on 40m you can reach up to 7-800 km during the day. Depends on propagation, can be challenging if not frustrating at voice QRP.

@daveschwarz5279 4 жыл бұрын

I think the other graphs are for capacitances ‘X’ inductances ‘L’, resistances ‘R’, and depending on your type of antenna there’s a mix of all these impedances measured in ‘Ze’. Think of RF radio waves of AC , X leads the wave form, L lags, and R would stay in parallel, in an idea world. Careful of transmitting high power when sitting under the antenna in your car.

@LouiseBrooksBob 3 жыл бұрын

I wonder about these Ampro antennas - they seem similar to an inductor with the whip part of the antenna acting a bit like a ferrite rod inside an inductor coil - notice how on the 80m antenna, after it had been shortened the Smith Chart plot fell a lot in the inductance side of the chart, below the line: lowering the whip inside the coil, increases the inductance.

@levkohut6035 4 жыл бұрын

Ahoj Pvle. No vypadá to velmi dobře a ten analyzátor je velmi dobrý - je to sice klon EU1KY,který jsem si stavěl, ale je výborný.

@OM0ET 4 жыл бұрын

Ahoj Leoš! Ano je to skvele male multifunkcne zariadenie. Uz len si musim poriadne nastudovat teoriu k meraniam a bude parada! 😉👍

@redjohn20001 2 жыл бұрын

Would it be possible to configure say a 40m AM Pro antenna as an EFHW on 20m using a 49 to 1 transformer and if so would that be more convenient for portable use?

@levkohut6035 4 жыл бұрын

Ahoj, no někde jsem k tomu viděl i manuál, zkusím se podívat. I když ovládání je docela jednoduché . Jinak tento analyzátor by měl spolupracovat i s tím ruským programem antskope, ale jen verze 1,s tím novým to nejde. Já jsem si k tomu vestavěl i bluetooth modul, takže k tomu nepotřebuji kabel. Ale jsem s tím spokojený

@tommycheshire5508 4 жыл бұрын

Paul, I had not considered a Mobil antenna. Looks like a well made setup, but because of conditions, I don’t think we can draw good conclusions. One thing I learned a long time ago is in a contest, your signal report is 59 even if you are using your big toe for an antenna|

@ol2tmx Жыл бұрын

I am wondering how to use this antenna as a balcony antenna. This type of antennas needs efficient size of counter-poise for getting good propagation. Usually people using their cars as very good counter-poise. Did anybody of you transmitting from balcony and do you have experiences with material and sizes ? Without feasible counter-poise the antenna will have just very bad SWR between 3 and 5. I just put a cable from the corpus of the central heating to the magnetic antenna holder. I got a bit better, but not perfectly.

@k2icc 3 жыл бұрын

It will be nice to experiment as follows: As the magnetic mount has some weight, then the antenna and some counterpoises to test right on the ground or mounted on some kind of tripod?

@OM0ET 3 жыл бұрын

Yeah it shouldn't be the big problem to try that 😊

@mabo4848 4 жыл бұрын

tnx.. great video

@PupoDD 4 жыл бұрын

Great video :D Thump up.

@OM0ET 4 жыл бұрын

Thanks bro! 😉👍

@fab0423 2 ай бұрын

Dommage que peut de personne parle du dipôle car les capacités sont remarquables ❤ je vous laisse faire les recherches je l'utilise et pour moi c'est le meilleur dipôle qu' il y a sur le marché... dipôle horizontal ou en V inversé..bref les capacités en couplage aussi sont surprenante... A vos recherches Sigma AMPro Number one .. bonjour de la France 🇫🇷 qui a découvert cette antenne il y a 6ans je les utilisé sous toutes ces formes... Ne vous contentez pas des acquis faites des testes et vous serez surpris du résultat sorte des champs battue je vous promets que cela en vos la peine 🤝 73 ''/51

@jurgen2596 4 жыл бұрын

Nice Video

@allsortsabouteverything 4 жыл бұрын

Just to note that 2.4m is 8foot not 4foot. One foot is approximately 0.3 of a meter

@OM0ET 4 жыл бұрын

Yes I know. It was mentioned in the video description already. Thanks :)

@om1aeg 4 жыл бұрын

Pouzivam 2 roky pre omff rychle aktivacie z miest, kde to je inak problematicke. PSV ta klame, lebo mas maly magnet a tak straty v malej kapacite medzi karoseriou a magnetkou "vylepsuju" hodnotu PSV. Kratka antena "dotiahnuta" seriovou indukcnostou ma vyrazne menej ako 50ohm, ale po zapocitani serioveho odporu malej kapacity magnetu voci karoserii sa to dostava v sumare na desiatky ohm :) Plus koax je sucastou anteny a vyzaruje, ved ho inou cestou a uvidis ako sa posuva frekvencia. Pripoj priamo tienenie na karoseriu, napriklad v mieste pre pripojenie stresneho drziaku a uvidis ako sa dvihne PSV. Anteny su to ale na svoj rozmer velmi dobre a aj cievka vinuta fo polky anteny co to vyziari na rozdiel od anten s cievkou len v pate anteny. Ja mam na magnete spraveny vyvod pre pripojenie zeme s karoseriou a zaroven 4 nacvakavacie ferity pri magnete na potlacenie plastovych prudov nech vyzaruje antena a nie koax, pomaha od 40m vratane, na 80m je karoseria auta velmi mala a tak ziari aj koax...

@ianharling9569 4 жыл бұрын

I use them on all of the HF bands including the Topband (160mtr) version and get excellent results.I got my antennas from Waters & Stanton here in the UK and honestly they work really well.I use a triple magmount at the moment but plan to use a permanent mount soon. 73.Ian.G7HFS/PA3IKH.

@OM0ET 4 жыл бұрын

Thank you for your comment. Please send me ths link and I will share it also in the video description 😉👍 73, Paul.

@ianharling9569 4 жыл бұрын

@@OM0ET I have emailed you the link as my smartphone won't let me send it on here?😱73.Ian.G7HFS

@ianharling9569 4 жыл бұрын

hamradiostore.co.uk.

@ianharling9569 4 жыл бұрын

Yes I can now send the link.😂

@OM0ET 4 жыл бұрын

@@ianharling9569 Thank you! I have added the link in the video description :)

@lektormaks2012 3 жыл бұрын

I wonder if is it possible to use built in ATU on this mobile antenna.

@willytee585 3 жыл бұрын

I use this antenna and use the internal tuner on my yaesu ft450 d no problems

@luismc75 3 жыл бұрын

@@willytee585 sorry my ignorance. But with a tuner can you tune and use this sticks to another bands? Thank you.

@willytee585 3 жыл бұрын

@@luismc75 no it won't tune ampros to other bands but because they tend to be quite narrow banded it will ebable you to use a much wider bandwidth on that particular band 👍

@om8js 4 жыл бұрын

Super TNX

@tommycheshire5508 4 жыл бұрын

Paul, who sells these antennas? I searched Google but was unable to find one. They do have good reviews on eHam.

@ianharling9569 4 жыл бұрын

I got mine from Waters & Stanton.They sell them under the Watson range.ie the 20 mtr one is called the WHF-20. I hope this helps. 73.Ian.G7HFS/PA3IKH

@OM0ET 4 жыл бұрын

I have also the link in the video description. But this time is this shop in UK temporarily closed.

@stevejones8665 4 жыл бұрын

@@OM0ET Hi Paul just for your Viewers Information as far as I know they are Open for postal delivery but I am guessing this will change as we start to come out of Lockdown. It's good to see how observant your Viewers are they spotted the size error at the beginning Hi Hi😊its crazy after 50 year's of going Metric and Decimal here in UK we still have some that still use feet,pounds and Gallons 🙄 Still i guess it could be worse we could have been using US Gallons and Measurements then we would all be even more Confused🤔. I wouldn't say No to there Petrol Prices tho😊. Well done to your young Daughter doing the Camera work.

@BarefootBeekeeper 3 жыл бұрын

Available on eBay UK

@fab0423 2 жыл бұрын

Very nice antenna... Very very good and rx/tx📶👌👍

@christineshustak Жыл бұрын

Are these folks still in business??

@peterlosangelos4108 4 жыл бұрын

In video description 2.4m is about 8ft

@OM0ET 4 жыл бұрын

Thank you for correction 😊 Has been corrected in description already, but in the video is still 4ft 😲

@prestonshute7243 4 жыл бұрын

Excellent portable antenna and another super video. Been doing something similar, places my Buddy Stick into my car mobile base to see how this works. Weather is not helping, each time I get ready to test the rain comes. But it should work ok, let you know. 73 wd4dda

@OM0ET 4 жыл бұрын

Hello Preston! Thank you very much! ;) 73

@Bojan_Slavkovic 4 жыл бұрын

Hmm, I need those, but not for /M, for my apartment...

@MrErsoyyilmaz 4 жыл бұрын

I had the same type antenna for 10 meters first on my balcony, moved it to the roof. With no much difference it worked very good. Made contacts thanks also nice propagation from TA to all Europe, central Asia and even to southern Africa. I think also to north and south America.