Modificated RANDOM WIRE ANTENNA with 9:1 UnUn (part 2)
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- Опубликовано: 13 сен 2018
- This is the following video of the Home made Random Wire Antenna with 9:1 UnUn. I did make a few modifications on it.
Used enclosure/box source link:
www.tme.eu/en/katalog/#id_cat...
Here is the link to PART 1: • RANDOM WIRE ANTENNA wi...
I will very appreciate if you will support my work and you became to my patron on Patreon ;-) / om0et
Thank you very much for watching my videos! 73 Paul OM0ET 
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That looks like a very neat unit. I'm going to watch the next video to see how it worked out.
Nice job!
thanks for the video!
Thanks for watching! ;-)
Paul , Great Video...great Info..73's WL7NP
Nice picture!
Paul, Nice job. 73's CE7MDB
Nice work as allways Paul - still need time to test the mag loop - but will do for sure
Thank you! Actually very poor propagations for QRP 🤔 i hope for QSO with you in the future. 😉👍 73
i was hoping to actually see the rest of the project!
I thought "20m" was an end fed half wave rather than a "random" wire. Nice setup.
Saw the previous video as well. With 20 mtrs of wire, it seems to me you've made a EFHW (End Fed Half Wave) antenna instead of a 'longwire' . Then the 1:4 or 1:5 UnUn, you have constructed in part 1, will work just fine. 73 de PD0PSX.
Great video. I am keen to get onto the HF bands at minimum cost and was very interested in your antenna. I have no garden and wish to build an antenna to fit into my yard. Will this work at half the length for say the 20m and 10m bands?
I would be worried that your antenna wire will break at the ring connector due to the strain of also supporting the box and ground rod connection. Better to add a strain relief there I think - it's what I do on mine at least :)
Looks nice. What sort of power handling do you anticipate that it can handle ?
Thanks. Hmm 🤔 i tryed it with my QRP rig and 5W. I don't know what max power it can handle at this moment. Depends on used core i suppose 10 or 20W. My opinion only. 😁
I want to build a similar antenna for DXing the AM broadcast band, 500 KHz-1600 KHz, any idea how I can determine the impedance of a 'long wire' (relative term on a 300 m band) antenna? I may need a 1:10 windings ratio on a 75 foot radiator.
Paul, enjoying your info , antenna appears to be working FB ! Does your Radio have a built in tuner ,i wonder if your good readings are being tuned by the internal matching ? Tks, 73,72 , Jerry K9UT
Hi Jerry. Yes it has the internal automatic tuner, but during this test it was turned off. 73 Paul 😉
Congratulations for the video!!! Neat and clean as usual. Very nice small box. And the clear lid a nice plus! With your call sign. Please when you test it can show the SWR response without the antenna tuner enabled? That way a real idea of the antenna will be displayed. Thanks for your excellence in videos!!! 73 de kk4nww
Thank you Eduardo! I will test it probably this weekend. I will try to made another video. I test SWR response only with disabled ATU. The SWR graphs in the previous video was by ATU disabled too. 😁👍
Does antenna need tuner? BTW another great vid with tones of info.
Yes
@@OM0ET Thanks for quick reply😉
Modified is the correct word, modificated does not exist, I like your video anyway
Thank you. Your antennas are so intricate and compact. Much admiration here for your skillful assembly. MikeinMinnesota N0WDM
Thank you Mike! 😊 have a nice day and 73 🙋♂️ Paul
😌👍
Under what circumstances would you need the Long ground wire ? If you do need it do you still ground it to Earth Ground with the alligator clip? It seems that by using the ground side you are making a Dipole antenna.. Right ?? 73's N5ZXZ
This kind of antenna needs a proper ground to have a better efficiency. But I work QSOs also without ground :)
Is the radiator wire solid or multistranded?
its multistranded
73 by..by....from yc7bla thanks
Chápem ze takto tvoje videa oslovia oveľa viac ludi ale škoda že si asi jediný Slovák čo robí videa s ham tematikou a niesu v slovenčine. V každom prípade zaujímavá tvorba ale raz z čas môžeš aj niečo po slovensky pridať 😉 nech sa darí. OM0AGP
Ahoj Peto :-) Vdaka ze si pozrel moje videa. Ano je to tak ako vravis, bohuzial v anglictine sa da oslovit omnoho viac ludi a ta snaha aspon takto vyjde viac na uzitok lebo tomu potom dokaze pochopit takmer kazdy na tejto planete kedze je to medzinarodny jazyk a tiez sa daju potom jednoduchsie pouzit titulky ktore vie Google nasledne jednoduchsie prelozit do kazdeho jazyka :-) Priznam sa ze vyuzivam kazdu moznost ked nieco vyrabam ci niekam idem vysielat aby som o tom spravil aspon nejake videjko. Preto si myslim ze vyroba takychto videi v dvoch jazykoch by bola pre mna asi dost narocna :-) Ale par videi aj v slovencine tu mam tiez :-) hoc ich sledovanost je dost nizka :-) Prajem ti 73 a snad aj dopocutia ved som z Vranova. Palo OM0ET
Question? Where can we source the case ?🤔
Here:
www.tme.eu/en/katalog/#id_category=100241¶meter_boxes=7&visible_params=2%2C316%2C325%2C324%2C323%2C68%2C69&used_params=2%3A373741%3B&page=9&s_field=artykul&s_order=DESC
Surely that yellow and white toroid is a very low frequency lossy dust-iron core, NOT a ferrite? Most well-respected ham websites recommend a much more efficient type 43 REAL ferrite for the 20-40-80 bands.
Sounds good advice, I was going to use a toroid from a switch mode power supply. I had my doubts about it, but I won't use that now. Where do I get a Type 43 ferrite, please? Found it. Amidon.
@@gortnewton4765 If you plan on going to 80mtrs you should use a type 31 ferrite. Type 43 is good for 40mtr and up. Karl
@@karlfell3768 Good, thank you Karl.
“Modified”
Thanks for correction 👍