I have an Inv L for 160, currently fed with a bulkhead SO-239 attached to a radial plate.....is there some sort of Balun/feedpoint choke that may work better? ________________________________________
Yes. I'm just finishing a major project to update my recommendations for chokes. Go with 18 turns of RG400 on a 2.4-in #31 core. That should provide around 10K ohms of resistive choking Z on 160M. It
I've never understood the value of a feedpoint choke for a typical ground mounted vertical antenna, Inverted-L or otherwise. Putting the choke at the base of the vertical section doesn't change the
It prevents the feedline from becoming part of the radial system/counterpoise, and thus part of the antenna. Without a choke, there is the potential for RF in the shack, and for noise coupling from t
I still don't understand. If you put a choke at the feedpoint you still have coax laying right next to radials for whatever the length of the radials are. There has to be coupling to the coax from
If the ground system is at or below grade, you don't need a choke. If you find you do need one then that means you don't have enough radials down. This is an example of ham antenna work where it is u
I agree, especially with the last sentence. Wes N7WS On 11/20/2018 4:10 AM, Rob Atkinson wrote: If the ground system is at or below grade, you don't need a choke. If you find you do need one then th
You DO if your radial system is limited, as you've stated below. If you find you do need one then that means you don't have enough radials down. This is an example of ham antenna work where it is use
Since I do not have the equipment or expertise to check if a choke is necessary, I simply wrapped 75 ohm Teflon coax around a few ferrites at my vertical feed points. This was inexpensive and necessa
Hams are ferrite choke choke and balun crazy Just the opposite is true. From past experience with club interference/noise issues here in northern CA I have found hams need more implementation of fer
I have too few (~20) insulated, 55 foot long on-the-ground radials under my 55' high inverted-L. In my desert conditions, running radials is quite literally a pain, but I will add more as time permi
<<<AND because they don't have to LISTEN on that antenna.>>> Well, no one should be using a vertical antenna for receiving, especially on 160 and 80 m. They are usually untenable in cities and suburb
On 11/21/2018 2:55 AM, Rob Atkinson wrote: My work has not shown this to be true. I am in a city on a 50 x 100 foot lot. I have had an enormous plasma TV about 25 feet from my antennas. You have not
<<<And in your situation, I'd strongly consider offering to buy your neighbor a new LED TV.>>> I tried that but it's a moot point. They moved to Texas last year. 73 Rob K5UJ _________________________