40M3C DIMENSION SHEET
204.00”
148.00”
REFLECTOR ELEMENT
FINE TUNNING NOTES:
FOR FINE TUNING, 1 INCH OF ADJUSTMENT IN OR OUT ON
THE DRIVEN ELEMENT WILL CHANGE THE CENTER OF THE
PASS BAND BY ABOUT 30 KHz
ELEMENT TIP LENGTH CHART- EXSPOSED DIMENSIONS
7.0 TO 7.160
MHz
7.1TO 7.250
MHz
7.16 TO 7.300
MHz
RELECTOR 52.50” 47.50” 45.50”
DRIVEN ELE
39.50”
35.50”
33.00”
DIRECTOR 1
34.50”
30.50”
28.50”
HAIR PIN SHORT
BAR POSITION
55.00” 55.00” 55.00”
DRIVEN ELEMENT
DIRECTOR ELEMENT
SEE CHART
THE HAIR PIN SHORTING BAR IS MEASURED
FROM THE CENTER OF THE DRIVEN ELEMENT
TO THE OUTSIDE EDGE OF THE SHORTING BAR
WHEN PREPARING BALUN LEADS, IT IS ALWAYS
BEST PRACTICE TO KEEP BALUN LEADS AS
AS SHORT AS POSSIBLE.
1/2 TIP SEE CHART
1/2 TIP SEE CHART
1/2 TIP SEE CHART
APROXIMATE
BALANCE POINT
187”
21”
