Costruire tappole per HF


Con questo articolo vorrei descrivere la sequenza delle operazioni che solitamente svolgo quando costruisco le trappole per le bande HF

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Coils Traps Antennas Links

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Trappole per dipoli
Io ho realizzato un programma chiamato Trap che, con metodo iterativo ma molto rapidamente, sintetizza il filtro, ne calcola il numero di spire e verifica la frequenza di risonanza

Tuning HF Coaxial Antenna Traps
Studiare un sistema accoppiato d'antenne mi sono imbattuto nell'arcinoto modo di tagliare un coassiale esattamente lambda/4

Quick Trapped 15/20m Dipole
The traps were tested using a coupling loop to the homebrew antenna sweeper and with a little squeezing, they tuned to 21.1 MHz

Variable Inductor Design
I have been looking at the typical roller inductor used in antenna tuners and some amplifiers and I have come up with what I think is a better design

10 m| 12 m| 15 m|
17 m 20 m| 2 m|
23 cm| 30 m| 40 m
6 m| 70 cm| 60 m| 80 m| 160 m| 136 khz| 630 m|
Bazooka
Beverage
Cb Antenna
Collinear
Cobweb
Delta Loop
Eh
End_fed antenna
EWE Antenna
Fan Dipole
Folded Dipole
G5RV
Halo
Helix
Hentenna
Hidden Antenna
Hf mobile
HexBeam
Isotron
Jpole
Loop
Log Periodic
Low Band Receiving
Moxon
Multiband
Morgain
Ocf Fed Dipole
Quad
Slot
Spiral antenna
Vertical
Vhf-Uhf-Shf
Wifi & Ghz
Windom
Wire
Yagi
Ant.Masts and mounts
Ant.Transmatch
Antenna_Analysis
Antenna Receiving
Antennas Shortwave
Antenna Switch
Balun Calculator Antenna
Contest Logging Software
Components-kit
Duplex
Dummy load
Feed Lines
Fiberglass tubing
Phased Array
Projects Homebrew
Software Antenna
Software Defined Radio
Swr Meter System of grounding
Theory Traps Tower
Sstv Software
Logging Software
Digital_Mode
HF_radio_modifications
Interface Radio
Memory_keyers
Microphone setting
PC sound Radio Interface
Pocket Pc Preaplifiers
Radio control
RF attenuator
Radio programming
Radio Transceivers
RF Filter
Spectrum_Analyzer
Tracking satellite
Voice Messages & Keyer