[Antennas] What is Max Power

[WA2BPE]

Uh, think there was a misstype done at the Times site - 2400 MHz, not
2.4 (nice, handy site, BTW).

Atten is 12.3 dB for the 100' run and the av. pwr is 160W.  Problem
(assuming a matched load) is simply dielectric loss and how soon
meltdown occurs.

Tom - WA2BPE

Jim Reid wrote:

> > How do you determine the maximum power a coax cable
> > can handle?   For example RG-214 has a dielectric breakdown
> > voltage of 2500 volts what kind of power can it handle?
>
> The voltage on the line will increase dramatically as the
> VSWR increases;  thus the power handling decreases
> as  vswr goes higher.  If the load,  source,  and cable
> are all 50 ohm,  the answer is 6.6 kW,  with about
> 0.3 dB attenuation in a 100 foot run at 2.4 GHz.
>
> See this site for answers:
>
> http://www.timesmicrowave.com/cgi-bin/calculate
>
> Select the cable type, input a frequency and run length.
>
> However,  as the vswr goes up,  the voltage peaks also
> rise,  and power handling drops quickly.  At amateur
> power levels,  you should have no problems; unless
> you are to have very poor Z matches,  hi.
>
> 73,  Jim  KH7M
>
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