Ham Radio: Simple HF Portable Multi-Band Antenna
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- Опубліковано 11 вер 2024
- Developing the Rybakov Multi-Band non-resonant antenna into an even more convenient way to deploy it. This time, no ground radials and using the car as a ground/earth.
Takes less than 5 minutes to deploy
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Always impressed how well the car's body works as a counterpoise just by capacitive coupling and without an actual electrical connection. Nice 👍 73 Leo
Thanks Leo!
Thanks mate, good show, from Stephen. FOO is currently in Unseo Incheon Sth Korea portable rooftop 14th floor FT-891 & same deal 4:1 - wire strapped to spiderpole and earthed to buildings rooftop earth piping. Air Quality Index 149 today :( got the mask on, cough cough Great job with the vids mate. Rocking a HL2/ prefix for now in the ROK.
Stay in and work the world! 👍👍
Thanks Tim for presenting this application of the Rybakov. I’ve been using it for some time even on 80 meters (L configuration with a 53’ radiator which the Rybakov inventor suggested to me). I look forward to trying your iteration.73 N4LWT
Hi Lawrence yes I’m going to try 53’ some day
Fantastic. Looks like the tuner did well with car for the ground too. It's been a couple weeks since I used the Rybakov--I need to take it out again. 73
Go for it Mike!
Got to admit... got my mind working overtime now... loving the idea of using the mag mount.. going to try my 9:1 unun and 33ft wire at the caravan using the mag on the car as ground.... cheers Tim.. 73 M6LBI
Surely a 33ft wire would be a half wave on 20m and thus would need a 49:1 transformer?
@paulsengupta971 after 40m... 1/4 wave is 33ft .. the one I use at home is that and works quite well... although for reasons I'm not sure of it tunes up on 80m too...!?!?! Ah well... suppose it works lol
@@IansAnglesey Ah. I'd have have thought a 1:1 would be the best bet for a quarter wave. Same as a dipole centre. But that wouldn't work for 80m, whereas the 9:1 probably will!
A 9:1 would probably still reduce the impedance down to matchable levels. Where a 9:1 can be an issue is with lengths of lower Z such as 1/4 or 3/4 wavelengths
I like all your antenna tests. It would be a lot more interesting to have a hamstick on a boot mount to compare to. We have no reference antenna to compare to. An antenna switch to do A/B comparisons would tell us all we need to know. Anytime I see an antenna test on a YT video I am usually let down. The reviewer rarely has a reference antenna. A dipole, inverted V, or even a vertical would be fine. In this case a hamstick would be a good comparison.
Hamsticks have high-Q, so low bandwidth. You can do it and it works, but you have to constantly tune multiple times per band to work stations. 👍.
You end up spending more time fussing with the antenna than making QSO's.
73
@@jamess1787 Sure a hamstick is not Ideal but I normally only operate in the bottom 50-75 kHz of each band (CW or a little FT8) . a hamstick will often beat out all the fancy screwdriver antennas and other expensive gear. For 25 USD it is hard to beat. Trying a hamstick on 80 meters is a joke, 40 meters sort of works. on 10,15,20 the hamsticks really shine.
Nice thinking
20m and up are pretty low Q and broad banded
@@xv9dl yeah if you're working CW on those bands, then you're probably OK. Im only SSB and it makes it a PITA to make contacts.
I love my "hamsticks" but it's really annoying every 20KHz to have to retune the antenna (or vswr of like 10+)
I prefer when you put the call signs on screen Tim.☘️👍
Noted 👍
Brilliant mate, haha I'm on the live steam Brilliant working 💪 great Tim :) 😃
Ha!! 👍
@@timg5tm941 Gosh haha speak soon I'm going try it in a few days :) finishes my DX Commander out to Tim it's just getting the time to sort it out.
“Is it a lemon?”………. “No”. 😂
Nice video Tim 😊.
Ha!! I don’t know why I said lemon 🍋 🤣🤣🤣🤣🤣🤣
Great idea! And great video as always. Cheers and 73 mate.
Thanks!!
Gotta love that great audio comment.😊
Yeah the good old 891!
Nice
We try this....I made your Rybakov last month....using 8x radials 16 ft long. This idea is easier when car Mobile. Those radials get all tangled up! Lol
Ah!!
Hi Tim, Do you find there is any directional preference with the sloping antenna? Your antenna tests are so interesting. 73, Pete 2E0IKX
Slightly directional, I’ll make a video on that soon
Thanks for the video, 73.
Thanks Brian! 73
What if use 5m telescopic whip and sort of coil at the bottom to compensate the length then in to 4:1 ? At least no need for a fishing rod?
No sense in adding an inductor AND an impedance transformer. If I had to alter this antenna I would feed the wire directly int a remote tuner. 73
What is actually the Diffference between the LDG RU 4:1 and the RBA 4:1 Balun ?
I believe one is an Unun and the other a Balun. The Rybakov should require an Unun (Coax to unbalanced antenna system). 73 Leo
Yep what Leo said
very similar to what i use .
Right 👍