antentopSince2 July

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

 

 

 

 

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

Special page devoted to

Two Simple Low Pass Filters for 145 - MHz Band

Custom Search

 

ANTENTOP- 01- 2018 # 022

Two Simple Low Pass Filters for 145- MHz Band

 

Inductor 100 nano-H contains 3 turns. ID is 15 mm. Inductor is wound by wire in diameter of 2.5- mm (10 AWG), 10- mm gap between turns.

Inductor 67 nano-H contains 2 turns. ID is 15 mm. Inductor is wound by wire in diameter of 2.5- mm (10 AWG), 7- mm gap between turns.

Inductor 33 nano-H contains 1.2 turns. ID is 15 mm. Inductor is wound by wire in diameter of 2.5- mm (10 AWG), 15- mm gap between turns.

 

Filter has SWR 1.1:1 at the 2- meter band. Figure 5 shows SWR for the filter at the 2- meter Band. Figure 6 shows return loss of the Low Pass Filter for 145- MHz Band at frequencies 200- 500- MHz. Figure 7 shows attenuation for the Low Pass Filter for 145- MHz Band at the 2- meter Band.

 

 

Figure 4 Layout of the PCB capacitors

 

 

Figure 5 SWR for the Low Pass Filter for 145- MHz Band at the 2- meter Band

 

www.antentop.org

Page- 75

 

74 75 76 77 78 79


 

 

Just for Fun:

Map IP Address
Powered byIP2Location.com

Thanks for your time!

Last Updated:

January 3, 2020 21:04

** PLEASE DESCRIBE THIS IMAGE **

** PLEASE DESCRIBE THIS IMAGE **

2003entop