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Antenne-aanpassingen - Baluns

Klik voor vergrotingBuild your own HF balun by EA4EOZ
A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cables. Many hams connect the center conductor of the coaxial cable to one side of the dipole, and the shield to the other. Wrong!
http://ea4eoz.blogspot.it/2012/09/build-your-own-hf-balun.html

Klik voor vergroting1:1 Current Balun by N5ESE
Here's another handy little Altoids QRP project. For Field Day 2002, I wanted to use my new Elecraft K1 (which has an automatic antenna tuner built-in) to feed a full-wave loop on 40 meters, to use on all bands 40 - 15. To preserve the feedline balance (I used 300-ohm ladder line), I needed a balun at the output of the K1's antenna tuner. This 1:1 balun did the trick quite nicely.
http://www.n5ese.com/balun_1-1.htm

Klik voor vergroting1:4 Current Balun by N5ESE
Here's yet another handy little Altoids QRP project. This makes a great travel companion to the 1:1 current balun (described -here-), and is intended to aid in tuning a balanced antenna or feedline that has a high impedance (100-600 ohms).
http://www.n5ese.com/balun_1-4.htm

Klik voor vergrotingHF 1:4 balun by PA3HCM
The first HF antenna I wanted to build was a Windom Antenna. This antenna required a 1:4 balun, so I made one.
http://www.pa3hcm.nl/?p=305#more-305

Klik voor vergrotingHomemade HF Antenna Balun by AA5TB
A balun is a device that is used at the feedpoint of a balanced antenna when an unbalanced feedline is desired to feed the antenna. Balun is a contraction for BALanced to UNbalanced.
http://www.aa5tb.com/balun.html

Klik voor vergrotingQRP Balun by AA5TB
I had a high permeability ferrite rod and an old B&W dipole center insulator in my junk box so I decided to construct a choke type balun for QRP use.
http://www.aa5tb.com/qrp_balun.html


Creatie datum : 15/09/2007 @ 21:24
Laatste wijziging : 28/10/2015 @ 12:34
Categorie : Antenne-aanpassingen
Pagina gelezen 31705 keren


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