DIY whip antenna for crossfire receivers (u.fl)
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- Опубліковано 4 жов 2024
- This antenna is what is commonly referred to as a "sleeved dipole" or sometimes a "bazooka dipole". It is a full range antenna. You can make the cable any length you want. Anything up to 48" will do just fine.
- Наука та технологія
You the man! The Mid Range Mountain Surfers and Long Range Hooligans groups thank you!
Toothpick/Whoop size CRSF u.fl Antenna please
Still above my comfort level I'd much rather pay a premium for one that properly built by you and checked like all of your top notch products... there's a reason I only fly iBcrazy antennas!!! They simply work harder!
🥃cheers🍻
What’s the best way to mount this? Should the air pocket section be mounted above the carbon and away from the frame or can you just have the rg142 section sticking up?
Can you please help me, what will be the length of antenna if my desired frequency is 629.143MHz and also the length of counter element RG142, it will help me a lot for my project thank you in advance.
I hope you notice me, thank you!
can a thin straw be used to ensure the air gap stays?
Yes, of course. THis is a good idea.
No fair taunting us with the network analyzer on the bench and then not using it.
I forgot my adapter for IPEX connectors or I would have ;)
Hey Alex great stuff thanks for all your hard work! You mentioned the mad mushroom style is the best for the taranis antenna upgrade. Would a truerc singularity work ok?
Cheers
No. THe singularity will not work as an antenna upgrade for your Taranis.
Is there anywhere common to most cities where a person could bring in an antenna or maybe 10 and have them tested for SWR, axial ratio, and other very basic attributes (for a fee)? I'm thinking maybe a few seconds per antenna like you've shown for the absolute basics. Or would a ham club have something similar (but probably much lower cost/quality) than the machine you used to test the antennas? Would VAS offer such a service for someone to drop off a few or mail in? One last question could an SDR be easily used to do any of these tests? Great job on the video.
Good question. SWR isn't too hard to measure and I have DIY SWR meter tutorial on FPVLAB. However, when it comes to emissions and axial ratio that requires some very expensive equipment.
I don't have your antenna testing equipment. Is there a way that I can test the antenna (short of flying the quad)? Side note: I use your ion antenna for my 6 mile LR quad and two immortal T's (and two black cannons on the rapid fire). I'm building a DJI LR quad and want to get the same 6 mile distance (or further). I was going to try 4 black cannons on the DJI goggle... do you think that will work? Or do you have something coming that will work?
Just get the new VAS antenna for the DJI HD system instead of rigging up all of the helicals. It will be much more compact that way.
As for the antenna, just be precise when you make it and you will be ok. There really isn't a way to test it without equipment.
@@CAGreve1231 Will do! Where and when can I buy those VAS DJI antenna's?
Any plans to make some antenna for the new DJI goggles?
Already in production ;)
@@CAGreve1231 Nice one. You're the man.
@@CAGreve1231 I was going to ask about this myself lol. I figured you had to be on top of it. I cant wait to see the improvement.
could you use RG58 instead of the RG142? Awesome tutorial as usual Alex
Possibly. I never tried. The RG142 shield is a convenient size, but RG58 would probably work.
@@CAGreve1231 Thanks Alex, I will try it, I only have a Anritsu site master to check it with.
Instead of an air gap, can you use more heat shrink shrunk down to take up the space? Does it actually need to be air?
No... well... you can, but the counter element would need to be shorter.
Shouldnt the 1/4 inch have gone first?
Internal heatshrink goes first. External second.
Hey Alex, I bought some 6 foot lengths of RG178 that already had the IPEX connectors installed, of course I don't need them that long, but I want to make more whip antennas from the excess that I cut off; for other quad builds. My problem is that I can't find anyone selling just the female u.fl connectors by themselves. I can find the male u.fl for PCB's or female u.fl with cable attached only. Can you tell me where I can purchase the female u.fl connectors without any cable attached ? I just don't want to waste that much leftover RG178. Thanks in advance for any info you can provide me with. Sincerely, Conrad
DigiKey usually has items like this. They come in a 10-pack. If they do not have it, check Newark.
@@CAGreve1231 I have checked DigiKey, but they only had the male ends. I actually bought my shrink wrap for the Whip antennas from them. I wanted purple, and DigiKey had it. I bought my RG178 and RG142 from Pasternack. I've checked so many places for the female u.fl, but nobody had them. I will check Newark right now. Thanks for the tip, and Thank You very much for sharing all of the antenna videos. I never thought antennas could be so interesting. Thanks again, and have a great rest of your evening.
I meant heat shrink lol
My drones receiver antennas length is about 3.1cm(2.4ghz))
Can I get more range by changing its length ? If yes whis is the better length of the reciver
No. That is the resonant length of the antenna.
@@CAGreve1231 thanks
Hello Alex. Not related to this video at all i was just hopeing i could reach you. I have bought a 16 turn 2.4 helical antenna because the 16 turn is all that was available in the uk. If i cut 6 turns off it so that it is a black cannon would it need to be re-balenced on an SWR Meter?? Thank you Alex and again sorry to ask an unrelated question. Nick.
It would throw off the SWR slightly, but likely not enough that you would notice.
@@CAGreve1231 Thank you. 😀
what other options do I have over the RG142 ? it is hard to find here.
You could possibly flare out the shield of an RG316 cable. It is a lot of work, but it will do well.
Can I place this antenna in a plastic tube, like a forevertube without affecting the tune of the antenna?
You will need to make it shorter in order to do so. How much shorter depends on the tube. If you can link me to the tube you want to use, I can take a guess.
@@CAGreve1231 It's just your average antenna tube
www.racedayquads.com/products/forever-antenna-tubes-choose-your-color-pair-of-2?_pos=1&_sid=aea183e04&_ss=r
@@taggerung890 - It looks like you'd need to shorten the antenna ~3/8" (trim off active element only) and that would do just fine.
@@CAGreve1231 is that based on density of the tube? Just curious.
Yes. The more dielectric you have, the shorter the antenna will be.