[Elecraft] 75ohm Impedance question K3S and Antenna side.

[John K9UWA]

Cut the hardline to multiples of 1/2 wavelength and the swr will be 1 to 1 on both 
ends. 50 in 50 out. In this case the OP needs around 200 feet. Once your get the 
velocity factor for the 1/2" hardline... that is ballpark 80 to 83%.  for 3.540 mhz is 
265 feet x .8 = 212 feet.   If you don't have a piece of test gear to get it cut 
correctly then put a 50 ohm dummy load at the far end keep cutting until your 
wattmeter says 1 to 1 swr. 1/2 wave multiples will hit most of the ham bands. A 
little high in the 30m band. Close enough.
73
John k9uwa
John Goller, K9UWA & Jean Goller, N9PXF 
Antique Radio Restorations
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