At 12:22 PM 10/20/2006, wa3afs@inav.net wrote:
>I have been running 600-700 watts into RG8X regularly for many
>years. 160M-10M. My coax runs now exceed 150
>feet to my phased 160M verticals and 40M 4-square. Never had a
>problem with the power handling in the RG8X.
>(It should be noted that I operate my antennas with low SWRs.)
And this would match with the mfrs data (which is probably a bit
conservative)... The loss will go down as the square root of
frequency, so at 2 MHz, it's less than half the dissipation for the
10MHz number, so the power rating would be roughly doubled.
not only that, but presumably you're not running RTTY or FM at 700 W
with 100% duty cycle. CW is probably around 50% Duty Factor,
doubling the rating again. Kind of depends on the thermal time
constants, but that's a much more complex calculation.
Jim
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