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91: Magnetic Longwire Balun / Unun M0UKD Amateur Radio Blog.
Again, with a good ground, no choke will be necessary and the antenna can perform at its best. Keep the coax between the UnUn and tuner as short as possible. Ideally put the tuner next to the UnUn, or better still, use the tuner instead of the UnUn, at the feedpoint of the inverted V!
Balun and Unun Configurations Palomar Engineers.
Balun and Unun Configurations. We often get the question Do I need a balun or an unun? The proper question is do I need a feed line choke or an impedance transformer whose output is configured as balanced balun or as unbalanced unun?
Unun 91.:
Photo 1 91: voltage unun assembled. The evaluation of the efficiency of the unun over the desired bandwidth 1.8 30MHz was carried out by testing the impedance that could be seen from transceiver side of the unun to a resistive load applied to the antenna side of the unun using an antenna analyser.
How to Build a 91: UnUn for Ham Radio Antenna YouTube.
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Construction of a 9-1 unun YouTube.
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How to Make a Balun or Unun.
if you want to make an unun connect the SO-239 center pin to the center tap of the toroid and connect the SO-239 ground to the bare binding post. I filled the center of the toroid with glue to hold it in place.
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antenna construction What is the purpose of a balun and a unun in a feed line? Amateur Radio Stack Exchange.
Amateur Radio beta. What is the purpose of a balun and a unun in a feed line? up vote 11 down vote favorite. I have never understood how a balun or a unun works and under which situation I need to use either of them in an antenna feed line.

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