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4:1 balun for 160 to 10 meters


stack two t-80-2 powdered iron toroid cores together. use super glue
post 16 Feb 2024
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Toroid & balun Links

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A simple broadband 4:1 Balun Transformer
10 bifilar turns are mount on an Amidon FT-240-61 ferrite core

Balun 4:1 Para varios tipos de antenas
The balun performs this function! that is, it overcomes this inequality and improves signal transfer

UN-UN for longwire antenna
The photo above shows the winding of about 70 turns and of 0.5 mm covered wire

The Dual-Ferrite-Bead 4:1 HF Balun
Ruthroff voltage balun design using a T200-2 Toroid core was selected

Binocular ferrite 9:1 balun RX Transformer
There are lots of good designs for matching transformers for receiving antennas. it's cheap and easy, and very high performance


The K9AY loop antenna for 160 and 80m bands

The K9AY loop antenna for 160 and 80m bands You don't have the space to put up a 4 beverage antenna's, an ewe or a 4-square and want 'good ears' on 160 and 80m? no problems try a k9ay loop antenna

Satellite Antenna Rotator Controller and TRACker

Satellite Antenna Rotator Controller and TRACker ARCTRAC is a portable integrated satellite tracking system

Duplexer 2m-70cm

Duplexer 2m-70cm- Usare un'antenna bibanda 2/70 con due radio separate V/UHF, usare due antenne separate V/UHF con una singola radio bibanda