ฝัง
- เผยแพร่เมื่อ 1 ต.ค. 2024
- Today I did a second test of my home made MINI 9:1 UnUn and 41m long Random Wire Antenna. I was finally successful and had in total 6 nice QSOs with 5W and small XIEGU X5105 transceiver.
The test took one hour, including installing and removing the antenna.
One QSO on 40M band was not recorded.
PART 2: • #1 TEST: mini 9:1 UnUn...
PART 1: • New Mini QRP 9:1 UnUn ...
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
Very good video again. Can we buy your MINI UNUN ? VA2SOB - Claude 73
Nice work Paul. Just a question, what firmware are you using on your x5105? I saw a little different menu on your rtx, on mine I've installed the 1.0.06 version downloaded from Sinotel.
Thank you :-) My FW is V1.0.04 Aug 6 2018 13:51:43 I like this version because has removed all main bugs I had before. I don't know which more features include yours .06 ver. I think there were repaired some CW issues only, right? I am working only phone and that was a reason why I didn't download latest FW yet :-) 73 Paul
@@OM0ET Exactly, they have enhanced some CW and audio features. Ok thank you and hope to hear you on air :-) 73 de in3ade
@@Robmarbz Thank you. Maybe I will look for latest firmware soon too :-) 73 and good week! Paul
Paul
Could you talk about the settings you are using in the X5105. Like the RF gain settings, etc.
About 48% seems to work best for me.
Also I have increased the CW delay to 800ms.
I’m building a new 9:1 that should handle 100 watts.
I always enjoy you build and field test videos.
73
Wd4dda
Hello :-) My current settings are:
RF Gain 100%,
CW delay 200ms,
CW rx Side tone 800Hz,
TX AF Gain 100%,
TX AF AM 60%,
NFM 100%,
RX AF gain SSB 60%,
AM 60%,
NFM 85%,
LCD Backlight currently 0% due to power saving during the day,
LCD contrast 20%,
REF Clock 26000000Hz,
NFM TX IF 10697000Hz,
Beep vol.1,
Aux AFIN 7,
Aux AFOUT 63,
S-meter cal. -34
I don't use CW features because I am PHONE only operator :-) That's great about your new 9:1 UnUn. Let me know when finish and how it works please ;-) Good luck with your project! 73 Paul
Very nice project. 7351 and good contacts. Using now another project instead 9:1, using 49:1 with very good results from 40 meters to 10 meters. 7351
I like your radio. It performed well with your random wire antenna. I understood some of your conversation. My parents are Greek but close to the Macedonian border and speak Greek and Macedonian but speak Macedonian at home. I can't speak it but understand maybe 50%. Your Slovakian language is very similar. Hello from Australia. 73 de VK1DON.
A very well made and informative video, thank you, I have now subscribed. Did you use the ATU on your radio to match the antenna? Please can you say what the resonant frequency of the antenna is?
Thank you! :) Yes I use ATU. but not everywhere. On some bands is it not required due to low SWR. This type of antenna is called "non resonant" therefore it should be not any resonant lenght of this wire. The "random" lenght of the wire can't be a halfwave of any HAM bands.
Thank you Paul I enjoy your video's and because of your excellent video's I have brought the Xiegu X5105 radio and I have made your 9:1 unun with the 20 meter wire...... it is a good antenna and an excellent QRP radio....... I am very happy with it . Many thanks to you ..... best regards from New Zealand (ZL1SEW) Steve
Hello Steve! Thanks for very nice comment! 😀 I am very happy that you like my videos. I am sure that you will be very happy with this rig. Don't forget to join in Xiegu X5105 facebook group. You can find there many useful informations and help from many users and xiegu tester as admin. Did you make QSOs with your antenna already? 73 and greetings from Slovakia 🙋♂️ Paul.
Ah another ZL ham woot! de ZL2BCI :) :)
That "Greeting from Ukraine!" made me cry.
Very nice paul,,,,. Great effort,. For demonstartion 9:1unun. It was better if you do caparative test of SWR AND TX with only random wire and with your 9:1 unun with grounding wire attached to unun
73
Hello Bob I was just watching your video now I have a lot of time right now I have covid-19 so I'm laid up in isolated away from everybody I found your video very very interesting really nice setup the wire antenna works great Happy New year to you and have a great day thank you for sharing this video
thanks again for sharing your experimentations
73 pierrot
Hello Paul. An interesting series of videos. The antenna would work much better if you used a long counterpoise on the ground side. This can just be layed out on the ground and it would give the antenna something to work against. Try it with a counterpois that is a quarter wave at least at the lowest frequency you wish to work at. Also, it would help to get the radiator wire s high as possible. For this you can use a telescopic fishing pole. You can buy cheap fibreglass fishing poles about seven meters long which are very light for carrying in the countryside. 73s de G0BZB.
hello paul, you have not shown the SWR. how was the SWR? best regards andi
I really like the way you put this video together. The effects were pleasant to watch and didn't get in the way. Very informative! Thanks for sharing. W0KNI
Thank you!! 😊
5W with SSB , very impressive.
Yes, thanks! 😊
In the 11m lane, someone managed to open the station. and how did you do it. Thanks 73!
Wow great content my friend, greetings from Indonesia
De
YG3FSL
Thank you very much! :-D I am happy that you like my video. 73 and greeting from Europe! Paul OM0ET
Your content is what I like most about antennas because you are made easy to imitate and understand to make, many thanks 73'
The gentleman that lowered his power at the 9:00 mark actually sounded better with five watts than with 100 watts. At 100 Watts it sounded a little blurred and was clearer at 5 watts. Very interesting. I have been keep up with your build and am very pleased it has turned out so well. 73!! DE KE5ES
Hello Bob, thanks for your comment 😉 This blurring may be caused by a small speaker used in X5105. Maybe I had volume turned too loud 😊. I tought that it will be barely hearable in camera, but later I realized that it was too loud 😲. Heh 😆 I have to fix it next time. This UnUn works great for me but it still needs proper lenght adjustments because is shorter than needed. Definitely this lenght 41m is better than 17.6m like it was in my previous video 😊
Have a nice day Bob and 73. Paul
Congrats on your antenna setup. I am just getting into QRP. I have a uBitx, a Bitx40 and finally a QCX40. I am looking at building a 9:1 unun and have watched all your videos on this adventure. I am curious as to why you only have 4 turns when the plan show 9 turns? I have a T106-2 torroid that I am going to use that came from a failed Chinese QRP antenna tuner kit. So I was curious as to why only the 4 turns. Really like that setup you have. DE WD8WV
Thank you for watching my videos! Here I paste one explanation comment from one user: To clear up some confusion in the comments...It is clear to see that you have 5 turns on the core. Each time the wire passes through the center of the core it is counted as one turn. Even though the drawing we see in the video has 10 turns the 5 turn toroid as built will work but more turns are preferred. The fact that it is a tri-filar winding, no matter how many turns, will result in a 1:3 turns ratio which also results in a 9:1 impedance ratio. This could be made with just 3 turns but, again, more turns are preferred. 10 turns would be much better. No matter how many turns it will always be 9:1 impedance ratio because of the 3 conductors in the windings and the way they are terminated. A ground or at least a length of counterpoise wire is important to achieve a satisfactory SWR.
OM0ET thanks for the explanation. I will have to try and build myself one of these.
Nice NVIS setup Paul, think your results closely parallel the what should be expected with an NVIS antenna arrangement, it's not that far above ground. That contact from the Ukraine is about the practical limit, maybe 1000km from your QTH with that antenna under normal conditions. Not surprised you didn't work the W7 on 20, it's not a DX antenna, most of your energy goes straight up. Can't think of a better setup for local contacts, remote net operation, a grab n go kit or for an emergency setup...you just throw the antenna over a 15 or 20' tree and away you go... so easy to deploy. A 9:1 balun is pretty easy to make if you have a proper ferrite core or an old toroid. Richard VA7AA
Yes Richard I fully agree with you :-) But I don't gave up hi hi :-D Of course I know that with this elevation is not possible working DX stations. i will try to made some verical next time ;-) 73, Paul
The configuration your antenna has been deployed for past year of videos is basically an NVIS antenna. Have you considered carrying a telescopic pole that when collapsed can be used as a walking stick. When expanded it would raise one end of your antenna giving a better takeoff angle for working DX. Mast length could be 10 meters up to 15 meters extended and 2 meters collapsed. 73 KB8AMZ
Usually I use a small telescopic vertical SPX100 or my home made magnetic loop 😉
I've been to Prague and tried to make call in VHF repeater, no one answered me. May be local hams don't speak English... Could you tell me what phonetic alphabet in use in Czeck and Slovak republics?
HAM activity in my country is low :-) but here you can find the table: sk.wikipedia.org/wiki/Slovensk%C3%A1_hl%C3%A1skovacia_tabu%C4%BEka
@@OM0ET Thank you! :)
I'd like to see a 1000watt version
Hello Paul,
I am glad that the antenna works so well. Do you have a stackpole? I have one with 10m length, this I often use for portable operation. Unfortunately the trees on my field do not have the right height ;-)
Thanks for the video
73 Bernd
Hello, no I don't have a stackpole yet. If I go to area with low trees I take the UltraLight Magnetic Loop Antenna with me. It doesn't need too much hight. It need just a small tripod and that's it :-) 73 Paul
Really like your videos and your experiments with various antenna as well as your simple antenna designs. I live in the USA in Ohio but have been to Slovakia - mostly Bratislava. Beautiful country!
Oh thanks! ;-) Thank you very much for the lovely comment! Have you been here for work or holidays?
@@OM0ET Holiday. Really impressed with Bratislava though I know it is much much west of your QTH.
Paul, just so you know; I saw a rooster pecking on your new antenna wire. After that, I saw him going after your radio. Watch your gear. ;-)
he he :-) I believe you mean this 1:15 ;-) 73 and thanks for watching! Paul.
@@OM0ET *lol*, yes, I do. Also, you're welcome. Your videos are great, and I love your craftsmanship and attention to detail. Thank you.
@@MyTube4Utoo Thank you very much! 😉👍 73 from Slovakia!
@@OM0ET You're welcome. 73
Random wire is 41 meters long
Yes, precisely 41.2m long ;-)
do you sell yout 9:1 balun?
Yes of course. I can made one for you. Contact me please on my email first. 73 Paul
Did you try running a ground wire from the ground side of your bnc connector, to bring down your swr?
Yes I did, there was slightly better SWR. I use about 8m long coax feedline like counterpoise.
I am working on a 9to1 and a 1to1 common mode chock connected in the same enclosure. I will let you know how it turns out. Thanks for the reply.
@@marybilbrey3442 Very well ;-) Thanks too. 73
nice job!!!
Thank you Damien ;-) 73 Paul
Nice ..!!
😉👍
nice work with the qrp station i have in my radio collection a army vhf radio RF10 from your country before the split i have all the paper work but not in English i think 2 watt on 6m band do you know this radio its very well built my one built in 1985 and its like new anyway Happy new year to you and yours keep up the good work love the videos
Yes Chris I used this transceiver when I served in Slovak Army 😃 but our radios were deaf, I don't know why 😃 Maybe there was some problem with antenna or electronics inside. Things made during the Communism era were made very well and with good quality, especially things made for Army. Even the components for Army electronics were specially sorted for theyr equipments, incl.radios 😉👍 Thanks for watching and Happy new year! 73, Paul.