Calculation of series connected output Pi / Pi-L network inductors

 

 

 

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 OUTPUT FILTERS USING SERIES CONNECTED INDUCTORS
 Pi-network
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 Influences of metal chassis to inductor:   15%
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 160m-30m
 --------------------------------------------------
 FRQ,(MHz):                  1.85   3.6  7.05 10.12
                           ------------------------
 L1,(uH):                   32.49 15.86  5.11  1.63
                           ------------------------
 L1,(uH)+15%:               37.36 18.24  5.88  1.87
                           ------------------------
 Coil core diameter,(mm):      50    50    50    50
                           ------------------------
 Diameter of wire,(mm):       1.5   1.5   1.5   1.5
                           ------------------------
 Turn spacing,(mm):             3     3     3     3
                           ------------------------
 Number of turns:            49.1  26.8  11.3   5.3
                           ------------------------
 Wire length,(mm):           7944

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 20m-12m                                                        10m
 --------------------------------------------------           ------
 FRQ,(MHz):                 14.15  18.1  21.2  24.9             28.6
                           ------------------------           ------
 L1,(uH):                     1.3  0.63  0.34  0.13             0.43
                           ------------------------           ------
 L1,(uH)+15%:                 1.5  0.72  0.39  0.15             0.49
                           ------------------------           ------
 Coil core diameter,(mm):      40    40    40    40               40
                           ------------------------           ------
 Diameter of wire,(mm):         6     6     6     6                6
                           ------------------------           ------
 Turn spacing,(mm):             8     8     8     8                8
                           ------------------------           ------
 Number of turns:             7.7   4.4   2.9   1.6              3.4
                           ------------------------           ------
 Wire length,(mm):           1113                                491
 

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