[Elecraft] KAT500 update

[Ken]

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