Re: KAT500 update
Posted by
KEN-3 on
Dec 09, 2011; 1:14am
URL: http://elecraft.85.s1.nabble.com/KAT500-update-tp7072932p7076583.html
On Dec 8, 2011, at 6:47 PM, Jim Brown wrote:
> Virtually all the loss in transmission lines at HF (and even VHF) is due
> to copper (that is, I squared R). Open wire line (and window line) has
> much lower loss than coax because it has much higher impedance, so the
> current for the same transmit power is much less than for coax.
The impedance of the feedline does not change the impedance of the antenna. A half wave length dipole at the proper height is still a 50 ohm feed regardless of whether it's fed with 50ohm line or 600 ohm line.
Ken WA8JXM
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