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4:1 Current Balun using Ferrite rods
4:1 Current Balun using Ferrite T200-6 one or two toroids. For the range 1.8 MHz to 6 MHz
post 28 Jan 2024
![4:1 Current Balun using Ferrite rods](images/4.1-current-balun-using-ferrite-rods.jpg)
Toroid & balun Links →
1:1 Balun for HF wire
1:1 50 ohm balun for use on HF horizontal wire dipoles. It uses an AM radio ferrite rod, with 3x14 turns of wire. 10-14 turns should be good for 2-30MHz. 18SWG enammeled copper wire
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
1:9 Antenna balun
I had this feeling the 1:4 balun was not presenting the greatest match to the open feed line. After I built and tried this 1:9 balun the autotune antenna tuner was able to
1:9 Antenna Long Wire con Balun 9:1
Vi occorre un antenna semplice e di sicuro funzionamento, in pochi minuti potrete costruirvi una Long Wire (filo lungo) o corto, fate voi
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1:1 50 ohm balun for use on HF horizontal wire dipoles. It uses an AM radio ferrite rod, with 3x14 turns of wire. 10-14 turns should be good for 2-30MHz. 18SWG enammeled copper wire
There are lots of good designs for matching transformers for receiving antennas. it's cheap and easy, and very high performance
I had this feeling the 1:4 balun was not presenting the greatest match to the open feed line. After I built and tried this 1:9 balun the autotune antenna tuner was able to
Vi occorre un antenna semplice e di sicuro funzionamento, in pochi minuti potrete costruirvi una Long Wire (filo lungo) o corto, fate voi
![Antenna switch arduino for icom IC-7300](/../antype/ch45/images/antenna-switch-arduino-for-i-com-ic-7300.jpg)
Antenna switch arduino for icom IC-7300 A solution built around an arduino nano and one of the readily available four relay switching boards