A short video about how to figure out the proper feedline length so you can tune all bands.
Жүктеу.....
Пікірлер: 9
@jonthebru10 ай бұрын
I have just put a doublet up. I'm trying to find more concise information on tuning the feedline but most information is very general in nature.
@nrfchannel8580 Жыл бұрын
Nice instalation
@acestudioscouk-Ace-G0ACE2 жыл бұрын
Thanks for the video, how did it work out in the end?
@user-qm5vs3ik3b3 ай бұрын
podczas deszczu masz wode w rurce.Leprzy 8mm poliamid walki.sa lekkie i wystarczy naciac z bokow.
@izzzzzz6 Жыл бұрын
Van I use a VNA with open wire? I want to test with a vna at the feedpoint of an inverted V and i was wondering about then using a vna to tune 300 ohm ribbon?
@joewilson22584 жыл бұрын
Your balun is wrong for matching the ladder line to fifty ohms for your radio station so you need a 12 to 1 balun or a unun to get the match you need .
@robertrumsey1609
4 жыл бұрын
Sorry but your statement regarding the balun is quite flawed. You are suggesting the balun ratio used should match the characteristic impedance of the feedline (600 ohms) instead of the actual impedance that exists on the feedline. Here is a good tech article that will explain why www.balundesigns.com/blog/baluns-for-multiband-antennas-fed-with-open-wire-or-ladder-line/. A good 1:1 or 4:1 balun is a much better choice and ununs should only be used for unbalanced antennas such as verticals, longwires and inverted L's.
@artc9114
2 жыл бұрын
@@robertrumsey1609 100% CORRECT.. We are not making the radio happy as they say.. We are keeping the tunable antenna system happy..
@robertvantichelt6448
3 ай бұрын
You can use a 1:1 balun if you use the correct length of ladder line. If you have the proper length, the end of the ladder line will have the same impedance as the dipole feed point. It will vary based on the frequency you are on.
Пікірлер: 9
I have just put a doublet up. I'm trying to find more concise information on tuning the feedline but most information is very general in nature.
Nice instalation
Thanks for the video, how did it work out in the end?
podczas deszczu masz wode w rurce.Leprzy 8mm poliamid walki.sa lekkie i wystarczy naciac z bokow.
Van I use a VNA with open wire? I want to test with a vna at the feedpoint of an inverted V and i was wondering about then using a vna to tune 300 ohm ribbon?
Your balun is wrong for matching the ladder line to fifty ohms for your radio station so you need a 12 to 1 balun or a unun to get the match you need .
@robertrumsey1609
4 жыл бұрын
Sorry but your statement regarding the balun is quite flawed. You are suggesting the balun ratio used should match the characteristic impedance of the feedline (600 ohms) instead of the actual impedance that exists on the feedline. Here is a good tech article that will explain why www.balundesigns.com/blog/baluns-for-multiband-antennas-fed-with-open-wire-or-ladder-line/. A good 1:1 or 4:1 balun is a much better choice and ununs should only be used for unbalanced antennas such as verticals, longwires and inverted L's.
@artc9114
2 жыл бұрын
@@robertrumsey1609 100% CORRECT.. We are not making the radio happy as they say.. We are keeping the tunable antenna system happy..
@robertvantichelt6448
3 ай бұрын
You can use a 1:1 balun if you use the correct length of ladder line. If you have the proper length, the end of the ladder line will have the same impedance as the dipole feed point. It will vary based on the frequency you are on.