On Tue,2/10/2015 12:14 PM, john@kk9a.com wrote:
3KW average power on 28Mhz and below. The PEP/CW rating is higher do to
less heating. This is well above the rating for RG-213 that I use for my
antenna lead.
There is dissipation in a ferrite core choke in the resistance coupled
from the ferrite core. It is the coax shield that gets hot, not the
ferrite (although the heat in the coax may be transferred to the ferrite
material). This is in addition to the usual dissipation inside the coax
associated with the differential transmitter power. The coax must be
rated to handle both.
I've never used any of those special high temperature, small diameter
coaxes, so I can't add anything more than that. :)
73, Jim K9YC
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