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coaxial jumpers

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coaxial jumpers

Post by 295 antenna » Wednesday, 02 May 2018, 18:32 PM

So Again i have been reading about jumper lengths and formulas. My question is there a formula for jumper length between transceiver and amp ? Now i have always used a three foot jumper but i understand there is a lot of discussion on this. Has anybody tried something different and had better results ?
I have tried shorter and it worked ok and i have tried a formula i read about so my jumper ended up at 9 feet no real change i could tell.
Thought ? experiences ? Formulas?


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Re: coaxial jumpers

Post by Grinder74 » Thursday, 03 May 2018, 13:09 PM

I use whatever length fits. Only reason I can see length matter is a co-phase antenna setup.

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Re: coaxial jumpers

Post by 295 antenna » Thursday, 03 May 2018, 16:17 PM

I agree Grinder its just i watched this you tube guy and he made a big deal out of it and i want to find out if anybody else had different ideas/


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Re: coaxial jumpers

Post by MDYoungblood » Tuesday, 08 May 2018, 8:12 AM

I make my jumpers long enough to reach from what it is connected to to what it needs to be connected to with maybe a couple inches of slack.

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Re: coaxial jumpers

Post by Wildrat » Monday, 23 July 2018, 12:21 PM

Same here, length is dictated by what I needed.


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Re: coaxial jumpers

Post by Beachbum24 » Monday, 23 July 2018, 15:15 PM

That's good to know, as i'll probably end up making my own as well. Maybe i'll even cut my 3 footers in half. Hmm... or not


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Re: coaxial jumpers

Post by Bobcat » Thursday, 26 July 2018, 14:59 PM

I agree with that "little bit of slack" in case you ever need to change a connector. But, if everything is 50 ohms.... whatever length it takes to do the job....



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Re: coaxial jumpers

Post by jessejamesdallas » Thursday, 26 July 2018, 17:34 PM

I have jumpers anywhere from 2" to 5 1/2", to 9', all work perfect...like said...whatever it takes to get from A to B plus a couple extra just for good measure...


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Re: coaxial jumpers

Post by Beachbum24 » Thursday, 26 July 2018, 19:11 PM

jessejamesdallas wrote:
Thursday, 26 July 2018, 17:34 PM
I have jumpers anywhere from 2" to 5 1/2", to 9', all work perfect...like said...whatever it takes to get from A to B plus a couple extra just for good measure...
Once again, thanks Jesse. Nice to know i can cut cable to any length i want. Will probably be doing that soon.


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Re: coaxial jumpers

Post by De_Wildfire » Monday, 30 July 2018, 15:42 PM

I use jumpers "just enough" with a little extra to do the job. I use LMR 400 Ultra FLEX. The other hard LMR 400 you have to be very careful about sharp bends.




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