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IBI-VR Positive V Antenna Vehicle Shortwave Radio Antenna 13.7-56MHz 10m 15m 20m Telescopic
Description:
The antenna frequency is 13.700-56.000MHz, which can resonate naturally according to the length of the rod. If used with an antenna, it can achieve 3-60MHz resonance.
Parameters:
Test antenna: IBI-VR third generation
Test height: horizontal +2m (up 4m+, standing wave must be much lower than this)
Test frequency: 14.270mHz+-100kHz/DIV swr and Z/R parameters 14.00mhz-56.00mhz SWR horizontal bandwidth 300khz-700khz.
Instructions:
The resonant length of the drawbar oscillator vibrator at 14.270Mhz is about: all the drawbar oscillators are fully pulled out, and one of the oscillators is only pulled out 2cm, that is, it can resonate at 14.270Mhz. If you have other frequencies to use, please refer to the following tutorial.
Calculation formula for length of 1/4 wavelength antenna: speed of light/frequency/4*95%=(single arm) length
Calculated length of 14.270MHz antenna is 299792/14.27/4*95%=4993mm
Calculated length of 21.400MHz antenna is 299792/21.4/4*95%=3330mm
Calculated length of 29.60MHz antenna is 299792/29.60/4*95%=2667mm
The specific use needs to be matched with the feeder system of the enthusiasts. After the first use, mark the specific frequency length on the vibrator, and the purpose of rapid installation can be achieved next time.
Package List:
-1 x Imported Epoxy Base+304+201 Screw Parts
-1 x Dedicated Balun for V Antenna
-2 x IBI-5.6m Stainless Steel Rod
Note:
-Do not use excessive force when pulling out and recycling, the pull rod is a refined product which is easy to damage!
-This antenna is a 1/4-wavelength V-type DP antenna, and the length of the single-sided transducer is 1/4 wavelength. Due to the influence of distributed capacitance, the length of the transducer needs to be increased or shortened during actual installation. It can be used when actually matching the radio refer to the vibrator length parameter for fine adjustment.
