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How to Make a Balun or Unun : 3 Steps - Instructables
https://www.instructables.com/How-to-Make-a-Balun-Or-Unun/
A Balun is used to match a balanced line to an unbalanced line. An Unun is used to match an unbalanced line to another unbalanced line. This is a 4:1 Current Balun.That means it can match a 200ohm antenna to a 50 feed line. If you plan on stringing up a dipole you use 2 equal lengths of wire with the Balun in the middle.
Building a 1:1 Balun - K4VRC
https://www.k4vrc.com/uploads/1/0/1/5/10156032/homebrew-1_to_1_balun.pdf
Punch or drill 2 holes near one end about an inch apart from each other. Insert a tie wrap or string thru one hole and out of the other hole. This will secure the coax. Prepare the end of the coax as shown., to be soldered. Locate 2 pieces of wire 16 to 14 …
BALUN BASICS PRIMER - Marki Microwave
https://www.markimicrowave.com/Assets/appnotes/balun_basics_primer.pdf
A balun is any three port device with a matched input and differential outputs. It is most succinctly described by the required (ideal) S-parameters: S 12 = - S 13 = S 21 = - S 31 S 11 = -∞ Note what is implied by this: • A balun is a three port power splitter, similar to a …
Baluns & Common Mode Chokes - na0tc.org
http://www.na0tc.org/lib/exe/fetch.php?media=technical:balun_p2_website.pdf
Circuit Models for Balun/Choke Ideal Balun Choke Z Choke = R Choke + jX Choke I I Z Choke I CM I Load = I - I CM I I CM Circuit model for Balun and Coax Shield Simplified circuit model for Balun I CM. Dipole With a Balun Shield I D1 = I I I I D2 = I I CM = 0 Inside Shield I D1 = I I I I D2 = I - I CM
DIY RCA - cat5 balun help | diyAudio
https://www.diyaudio.com/community/threads/diy-rca-cat5-balun-help.145247/
Victoria. 2009-07-27 10:39 pm. #6. 2009-07-27 10:39 pm. #6. Cat5 to video will require a balun at each end because video is 75 ohms and cat 5 is 100 ohms and the impedance matching will be important at video bandwidth (~4+ MHz). •••. More options.
VK5AJL - Why buy baluns - make your own.
http://vk5ajl.com/projects/baluns.php
VK5AJL - Why buy baluns - make your own. A quick word about this page. The definitions here are mostly consistent with the ARRL handbook although it's wording is a little confusing. The only problem I have with the handbook is the labelling of the current transformer. There is simply no difference between a current, voltage or impedance ...
Wideband Balun Design with Ferrite Cores
https://digitalcommons.calpoly.edu/cgi/viewcontent.cgi?article=1282&context=eesp
The balun device is used to balance inherently unbalanced systems by canceling or choking off unbalanced current flow. When an unbalanced line is connected to an ... Circuit Schematic Figure2.2:1:1TransformerBalun When current carrying wire is wrapped around a toroid of magnetic material, a
9:1 Magnetic Longwire Balun / Unun – M0UKD – Amateur Radio ...
https://m0ukd.com/homebrew/baluns-and-ununs/91-magnetic-longwire-balun-unun/
These are sometimes known as a Magnetic Longwire Balun. Its really an impedance transformer (9:1) to feed a high impedance, end fed (unbalanced) random wire which is likely to be a few hundred ohms, and transform it into something closer to a …
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Making your own toroidcore inductors and RF transformers ...
https://www.raynetrepair.us/circuit-design/making-your-own-toroidcore-inductors-and-rf-transformers.html
4-5 Tbroid winding styles: (A) distributed, (B) close wound gibîe), In general, close winding is used for inductors in narrowband-tuned circuits, and distributed winding is used for broadband situations, such as conventional and balun RF transformers. The method of winding has a small effect on the final inductance of the coil.
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