Loss at 160 is determined by the thickness of the copper plating and even
the best will have a bit more loss than all copper. An additional 1dB/100'
of resistive loss in a 200-300' run means nothing and with a well
constructed Beverage wont even require a preamp. Its the loss from water
into the foam and aluminum that you dont want.
These days Im running 50-300' of RG-6 to the switch boxes and 700' of 1/2"
CATV hardline back to the house. The RG-6 is elevated thru bushes and low
branches as rodent prevention and the hardline has been on the ground about
22 years.
With good grounds and plenty of ferrite there is no detectable common mode
radiation.
Carl
KM1H
----- Original Message -----
From: "Doug Renwick" <ve5ra@sasktel.net>
To: <topband@contesting.com>
Sent: Tuesday, January 03, 2012 2:48 PM
Subject: Re: Topband: CONNECTORS AND CABLE
> Here we go again. One camp saying don't go cheap and another camp saying
> cheap is fine. I pay 5 cents a foot for flooded RG-6 from Shaw Cable.
> Copper coated steel center plus braid and foil. My receive 4 square run
> is
> about 700 feet. I can hear more than I can work. I don't need expensive
> RG-6 for rodents to chew on. The rodents enjoy the cheap cable. Cheap in
> price but just maybe not cheap in quality. YMMV.
>
> Doug
>
>>-----Original Message-----
>>
>>On 1/3/2012 7:06 AM, Andrey Fedorishchev wrote:
>>> Cheap RG6, the one with CCS center conductor, sometimes shows quiet high
>>> losses (few db per 300ft.) at 1-5 mhz and at the same time quiet low at
>>> higher frequencies;
>>>
>>> Not only the losses but signal leakage is important and not every brand
> of
>>> RG213 or RG6 is suitable at some instalations;
>>
>>Yes on both counts. I've written a Q&A style tutorial about coax that
>>addresses these issues, and a lot more.
>>http://audiosystemsgroup.com/Coax-Stubs.pdf
>>
>>Another point -- some of us DO have long runs to our antennas, so losses
>>can be significant. I have two runs to TX antennas that are 350 ft and
>>two for 160M that are 280 ft. My neighbor, K6XX, has some runs that are
>>nearly 1,000 ft, for which he's using parallel runs of hard line.
>>
>>73, Jim K9YC
>
> _______________________________________________
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