[TowerTalk] Coax loss.

Bill Hider, N3RR n3rr@erols.com
Thu, 03 Sep 1998 01:51:54 +0100


>From the ARRL Chart, it's on 10 meters.  The "standard" for contesters is to keep
our feedline losses on the band of interest, at VSWR = 1:1, to no more than 1 dB
(from rig to antenna, including connectors).  3.5 dB is a HUGH loss to have to
contend with, unacceptable in a contest station and pretty dismal in a "casual"
operation.

I also wouldn't say that 0.2 dB/100 ft is "quite a bit better than the chart
shows".  The 0.2dB can easily be accounted for as measurement error in the test
setup and measurement accuracy of the  test equipment.

Bill, N3RR

K7LXC@aol.com wrote:

> In a message dated 98-09-02 14:51:01 EDT, w2vjn@rosenet.net writes:
>
> << The losses were determined and normalized to dB/100'
>
>  Cable                    Measured          From ARRL Chart
>
>  LMR600DB               0.52 dB                   0.4 dB (from spec.)
>  RG-213                    1.0                          1.2
>  RG8X                       1.9                          2.0
>
>  Note the 213 is quite a bit better than the chart shows. >>
>
>        Interesting. So you've got 3.5 dB loss in that run of RG-213? Hopefully
> it's a lowband feedline - hi.
>
> Cheers,  Steve  K7LXC
>
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