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Simple but effective half wave dipole
I made a coil 19 turns of thick copper wire, or in my case a piece of semi-rigid coax with diameter of 50mm. Parallel I put a 100pF high voltage capacitor
post 07 Jun 2024
![Simple but effective half wave dipole](images/simple-but-effective-half-wave-dipole.jpg)
Antenna Transmatch tuner Links →
Build hf antenna tuner
This page details several T-match tuners. By comparing them, you should be able to construct a tuner to your own particular requirements
Realization of a coupling box by Patrice
The torus has 6 wires: 2 side CV, 2 side self and 2 to the outputs of the box, for the RX - TX.- For the six outputs of the torus, put "souplisso" recovered on the transformer of a micro insulation 2000 volts
Box agreement antenna with coil with caster and 4 CV isolated
From the left to the right we see the balun on the ferrite bar, the 4-cage CV and the roller coaster.
Box Antenna tuner 8 bandes
It covers amateur bands from 80 to 10 m in 7 ranges because the bands 14 and 18 MHz use the same position of the switch
Box Antenna tuner monobande 28/30 MHz
Like the 10 MHz mono-band box, this box operates in autotransfo. The permissible power is greater than 200 watts
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This page details several T-match tuners. By comparing them, you should be able to construct a tuner to your own particular requirements
The torus has 6 wires: 2 side CV, 2 side self and 2 to the outputs of the box, for the RX - TX.- For the six outputs of the torus, put "souplisso" recovered on the transformer of a micro insulation 2000 volts
From the left to the right we see the balun on the ferrite bar, the 4-cage CV and the roller coaster.
It covers amateur bands from 80 to 10 m in 7 ranges because the bands 14 and 18 MHz use the same position of the switch
Like the 10 MHz mono-band box, this box operates in autotransfo. The permissible power is greater than 200 watts
![The K9AY loop antenna for 160 and 80m bands](/../antype/ch9/images/the-k9ay-loop-antenna-for-160-and-80m-bands.jpg)
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