RADIO: The Coax Trap, A simple device that makes your Antenna, Multiband.
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- Опубликовано: 15 сен 2024
- RADIO: The Coax Trap, A simple device that makes your Antenna, Multiband.
A coax trap is a coil and capacitor in one, a L & C circuit that creates a high impedance circuit at any given frequency (depending on the number of turns and diameter).
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Cheers
Mike M0MSN
Much better instructions than just about anywhere else on how to actually connect the ends up. Many thanks from Ohio, 73 de KD8ZM
Brilliant work. Thanks for sharing. You must have a tolerant spouse tinkering on a breadboard with the sugarpot.
Lots of trap options all in one handy video 👍🏻
Thanks Mike.. after your 2m/70cm flower pot (which by the way works like a dream) I'll have to try this small project next.
Cheers Martin. :)
As always, your videos are very much informative. Thank you.
My pleasure!
Love the tools. Must get some of those.
Thanks for another great video Mike! LCARA Ham Radio
Thanks again!
This is great! I'm making traps for an antenna, and originally planned to use ordinary capacitors & wire inductors. But this looks SOOOO much easier. TNX
Great content. Inspiration to many i'm sure. Thank you (M0DSK)
My pleasure!
Great video, thanks for sharing 👍🏻
Thanks for watching!
Thanks for that.
Snap Mike.... I have made several of these over the years for various frequencies. The only "modifier" was to use glue lined heat shrink tubing instead of the insulation tape. That was because i had access to plenty of it at large diameters, otherwise it is quite expensive ....... cheers..
That was the next step, but the cost!!!!!!!!!
@@mike-M0MSN Yes the cost is significant for large diameter glue lined heat shrink. I could only buy it in 1mtr lengths. We used it extensively in Commercial Broadcasting to keep weathering out of large cable splices.
Just pray you never have to take the stuff off again !!!
Simples! Nice one Mike.
thank you
Thank you for the information. N0QFT
Brilliant stuff if you have a small ish garden might try this one :) 😃 Thanks 😊
👍
I love the units of measurements... Metric and British lol
But the most important thing is the measurement. For me it is usually not correct and you have to adjust it. This is sometimes quite frustrating
Parabéns amigo pela antena
obrigado meu amigo
Brilliant , so easy. Problem I have is I cannot get the coax trap software to run on my old windows laptop (win 8) which stops me from doing the calculations for the formers I have.
is it common used to rotary dipole antennas?
I am relatively new to HF and I love your build videos, and yes I read the description of the video, but it would be really helpful to have a brief introduction to the problem you are trying to solve.
Thanks for the idea!
Hi Mike,
Fine video. You made that look to easy. :-) Stay safe. 73 WJ3U
Thanks 👍
Great video. Great idea. How the hell did you suss this out. Damn clever 👊
👊
Superb Mike as usual, but got to say... listening with headphones on .... thats some fair sound effects around the 9.54 mins mark.... with another added in for good measure at the end.... lol.... made me laugh anyway.... cheers.... Yoki...
Yes never film when the kids are home.... Lol
@@mike-M0MSN - LOL...reminded me of my college rooming house. The quietest time of day was around 4 AM...just snoring.
Super useful video, though, and your build technique was thorough and efficient with a very clear visual of how things connect up.
Half the fun of building things for Ham radio is the joy of getting to use a hot glue gun.
to true... :)
You disserve a thumbs up for your handy work of course. I looked and listened carefully several times
to this video and the previous one, but I still don't see how your figured out where to put the trap and to change
the 20 meter antenna length.
Ok, this video covers a trap for 10m but it is the same principle. It is put on the 40M element, at the 1/4 wave point for 10M, that’s 8’2” or 2.5M from the feed point.
@@mike-M0MSN Thanks Mike, now I see why. I was confused, sorry for that.
I just LOVE all your super cool tools, like the conduit cutter and the cool thing you use to hold the coil in place to solder it. I think it is called a 13 Amp plug :-) Have you done anything on RF Chokes, preferably wide band? Cheers, Chris.
Thanks Chris, Chokes ! that's an Idea
You need a couple of carpet tiles for the bench ;-)
I need a workshop and not my kitchen lol
Neat work!
Thanks!
Nice......
Thanks
But does it work? Normally trap is built with a capacitor and inductor.
They work perfectly
It would be nice to check it with a nanoVNA.
or MiniVNA
May do that.. :)
Good video Mike. Did you happen to test the trap with a meter?
Yes I did.
First! Nice one Mike 73
Many thanks! Tim
How do you install that program in windows10
Ask PCworld
It would be nice to check it with a nanoVNA.
Yep will do.. :)
Humm where is the mecanical strength in the connection sorry if i souind offish but there is a distinct lack of thought into that side of things in most of the things i see these days also the soldering leaves a bit to be desired . just me but things that annoy the hell out of me i have been soldering radios ect since i was about 6 or 7 65 now think i have a grasp of how to solder things . I spose what i am saying is a bit more thought into the construction .
No worries Pete, the video is just to give the viewer the idea, a lot more soldering is done off camera, and for version used on dipoles s/steel nuts and bolts stands are used to connect the wires to. like you I have been soldering from a young age so understand your rant... :)
why why why
???