Thanks for posting your measurements Tony.
I converted your percentages to dB total and dB/100 ft
as shown in the following table. For your 220 ft runs,
it looks like there is little benefit to using 9913 over
RG213 and little benefit in using 7/8 inch hardline over
1/2 inch hardline. The 1/2 inch hardline offers 1 dB
less loss than 220 ft RG213. Very interesting result.
Tom N4KG
Cable (avg 220 ft) dB loss dB/100 ft at 10M
7/8" hardline - 88% 0.555 0.25
1/2" hardline - 82% 0.86 0.39
9913 - 68% 1.675 0.76
RG-213 - 65%. 1.87 0.85
On Thu, 20 Dec 2001 "N2TK" <t.kazmakites@verizon.net> writes:
>
> Just had tilted over the tower to replace some antennas. Checked the
> coax
> for loss. Measured the power going into the coax and measured the
> power at
> the end of the coax at 28.0 MHz with a dummy load on the coax. Used
> the same
> watt meter for both. The length of the coaxes is about 210 - 230'.
> Here is
> the loss as a percentage of power out/power in.
> By the way, I cut off the end of one of the 9913 runs at the house
> (lowest
> point of run) to see if any discoloration of the copper. There was
> none.
> This coax has been up for 8 years.
> 7/8" Prodelin hardline - 88%
> 1/2" Prodelin hardline - 82% - 2 runs measured the same
> 9913 - 68% - 2 runs measured the same
> RG-213 - 65%.
>
> The measurements are approximate and were done to just check to make
> sure
> the coax didn't have a problem.
>
> Tony
> -----Original Message-----
> From: owner-towertalk@contesting.com
> [mailto:owner-towertalk@contesting.com]On Behalf Of Paul Womble
> Sent: Wednesday, December 19, 2001 09:39
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] 9913 Reliability
>
>
> While I agree that 9913 is probably not the best choice out
> there...I
> have to say that I had 2 runs of 9913 up for about 3 years. When I
> replaced it with hardline, I cut open the cable in a couple of
> places
> and there was no water inside the cable.
>
> 9913 is not bad cable...you just have to be extra careful sealing
> connectors & making sure there are no nicks or cuts anywhere to let
> H2O
> in.
>
> 73
> Paul K4FB
> Lakeland, FL
>
>
>
>
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> foundation diagrams and charts, along with full details are now at
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> AN Wireless Web site: http://www.ANWireless.com
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>
>
> AN Wireless Self Supporting Towers are now available! Windloading
> tables,
> foundation diagrams and charts, along with full details are now at
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> AN Wireless Web site: http://www.ANWireless.com
>
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