Yagi Antenna GXP-7 (7 elements 5 bands)

 

Resonant frequency [Resonance frequency]: 28, 21, 14 MHz 
Frequency [Frequency]: 24, 18 MHz Logoperiodic 
Number of elements [Number of elements]: 
-28MHz 3 elements plus structure 
-21MHz 3 elements plus structure 
-14MHz 3 elements plus structure 
-24MHz: structure 
-18MHz: structure 
(Structure includes four elements: dipole 14MHz, 21MHz dipole, dipole Reflector + 28MHz) 
Maximum profit for [Max. Gain for] 
– 14MHz 8.6 dBd 
– 18MHz 6.8 dBd 
– 21MHz 9.0 dBd 
– 24MHz 6.8 dBd 
– 28MHz 9.3 dBd 
Damping Front – rear (front to back ratio) 
– 28MHz , 21MHz, 14MHz: 30dB 
– 24MHz: 15dB 
– 18MHz: 10dB 
bandwidth for SWR of 1.5: 1 (Bandwidth 1.5: 1) 
– 28MHz: 600 KHz 
– 21MHz 350 KHz 
– 14MHz: 350 kHz 
– 24 MHz nierezonansowe , increased SWR [non resonanse band, higher SWR] 
– 18 MHz nierezonansowe, increased SWR [non resonanse band, higher SWR] 
Boom length [Boom lenght]: 5,2 m 
Longest element [Longest element]: 11.33 m 
Radius [Turning radius]: 6.09 m 
minimum height of the mast for installation on the roof [Min. Antenna height over the building (roof)] 7 m 
minimum height of the mast for mounting on the ground [Min. Antenna height in (open space) over the ground]: 12 m 
diameter handle connecting the boom to the mast [The clamb 50 or 60mm diameter for boom – mast bracket]: 50mm or 60mm 
Weight [Weight]: 27 kg NOTE: You can add 1 element for which you need to do a separate power supply. It will then worked as a rotary dipole and here we choose the following frequencies: 10, 7, 3.5, 3.8 MHz. With version Dipol 10 and 7 MHz are your short and long, about which versions can be suspended decides mast height at which the base antenna is installed. (*) The GXP-7 antenna band 18 and 24 MHz is separated and can occur logoperiodyku SWR increased, which can compensate for the length of the power cord. NOTE: You can add one element for Which do you need it for a separate power supply. It will then worked as a rotary dipoles and here we choose the Help Us frequencies: 10, 7, 3.5, 3.8 MHz. When chose dipole version 10 and 7 MHz are your short and long, about Which versions can hang determines the height of the mast, he Which is the basic antenna installed. (*) Bands 18 and 24 MHz in the antenna GXP-7 are separated In this logoperiodic with Increased SWR, Which can be compensate for the length of the feeder.   – See More Link

 

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