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Main support

Matching box

NO:1

NO:2

NO:3

NO:4

NO:5

NO:6

NO:8

NO:9

20m capacitor cap

40m capacitor cap

NO:10

NO:7

Main counterpoise

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05

3.3 Commissioning Step

 Adjust main rod NO:1-NO:3, or may adjust the 

center frequency point of 10m band.

 Adjust main rod NO:5, or may adjust the center

frequency point of 15m.

 Adjust main rod NO:7, or may adjust the center

frequency point of 20m.

 Adjust main rod NO:8 - NO:9 length, or may

adjust the center frequency point of 40m.

 The rough center frequency point of each band is 

as follows:

40m

7.05MHZ

15m

21.3MHZ

20m

14.2MHZ

10m

28.5MHZ

 Due to the influence of installa�on environment, 

if there is any devia�on, please adjust it appropriately 

according to above parameters.

VG4 antenna can be adjusted to frequency band center frequency point that we need. During 

the  adjustment,  the  adjustment  of  the  high  frequency  band  shall  affect  the  low  frequency 

band, while the adjustment of the low frequency band shall not affect the high frequency band. 

Therefore, the adjustment sequence is: to adjust from 10m of high frequency band to 40m of 

low frequency band. Generally, only 40m frequency band needs appropriate adjustment.

 Twist in the main counterpoises

.

*Please make sure that each main rod is connected and fastened well; otherwise the 

overall strength of the antenna shall be affected.

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