Helix Antennas for HF Mobile


20 meter helix antenna. The antenna is approximately 65 turns of #14 AWG THHN stranded wire wound on a 1 1/2'' cpvc coil form
post 26 Apr 2023



Antenna CB 27 MHz Links

83



Easy to build Deltaloop for 27.555MHz 11m, DL5DBM
In this setup you have a horizontal polarisation, the total length of the wire is 11,07 meters

Easy to build compact quad antenna
If you want to communicate with mobile units, with vertically polarized antennas then you must use vertival polariztion

Extended Double Zeppelin 27.500
Full wavelength: 300 / 27.555 = 10.887 x 0.94 = 10.234 m Top sections of antenna: 0.64 wavelength: 10.234 x 0.64 = 6.550 m for each leg

Hb9cw for 27 mhz
For 27.500 Mhz lambda=10.9091 m 1/2 lambda/100=5.5 cm

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|
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