antentopSince2 July

** PLEASE DESCRIBE THIS IMAGE **
** PLEASE DESCRIBE THIS IMAGE **
** PLEASE DESCRIBE THIS IMAGE **

 

 

 

 

Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an

Special page devoted to

Ground Plane for the 40,-30,-20 and 17- meter
Bands

 

Custom Search

 

ANTENTOP- 01- 2012, # 016

Ground Plane for the 40,-30,-20 and 17- meter Bands

 

Table 1 shows data for the matching unit. All inductors are coiled by wire in 2- mm diameter (12- AWG). Inductors are air- winding. Diameter of each inductor is 40- mm. Gap between coils is 3- 5-mm. The gap should be defined at the tuning of the antenna. High- voltage ex- USSR capacitors K15U-1 are used in the matching unit.

Vacuum ex- USSR relay V1V did switching on the matching circuit. All matching circuits were sitting in aluminum box by dimension 330x200x130- mm. Figure 3 shows the design of the box. (There are matching circuits for the 80/75- meter Band inside the matching box. However, the antenna could not provide satisfaction operation on the bands. So I did not use the antenna on the bands)

 

Ground Plane. General view

 

Table 1 Data for parts for the matching unit

 

Band, m

 

 

Inductor, turns

 

Capacitor, pF

 

40

 

3

 

300

 

(3X100- pF)

 

 

30

 

8

 

118

 

(100- pF + 18- pF)

 

 

20

 

8.5

 

22

 

 

17

 

5.3

 

112

 

(100- pF+ 18- pF)

 

www.antentop.org

Page-43

 

41 42 43 44 45

 

 


 

 

Just for Fun:

Map IP Address
Powered byIP2Location.com

Thanks for your time!

Last Updated:

May 3, 2016 23:04

** PLEASE DESCRIBE THIS IMAGE **

** PLEASE DESCRIBE THIS IMAGE **

2003entop