Topband: Beverage feedline

[Carl]

RG-6 with a CCS center conductor is all about the same as far as RF or DC 
loss is concerned. Figure on .35dB/100' at 2MHz.

When I used 750' of RG-6 to feed the RCS-4 Beverage switch 25 years ago I 
had no problem with the switching. I also used a small preamp at times.

That cable didnt last one winter before critters destroyed it and I ran 
.412" CATV hardline which was already pretty much obsolete. That is still in 
service and yearly tests show no additional loss which is .13dB/100'.

The 1/2" 75 Ohm CATV hardline comes in a hair less at .09dB/100'. I use the 
3/4" for transmitting on HF since it was the most used during the network 
construction and I was given huge amounts of partial to almost full reels 
when the installation contractors left for Indiana for their next 
job....real gypsies!

I use 7/8 and 1" for VHF and up.

Carl
KM1H



----- Original Message ----- 
From: "Bill Wichers" <billw at waveform.net>
To: "Timo Korhonen" <timo.korhonen at elisanet.fi>
Cc: <topband at contesting.com>
Sent: Thursday, June 26, 2014 5:27 PM
Subject: Re: Topband: Beverage feedline


> The copper clad steel center conductor won't make much difference in terms 
> of loss on 160m. It is an issue if you will be powering Anything through 
> the coax (like amps or antenna selection relays) since the dc resistance 
> is higher.
>
> If you need solid copper center conductor rg6 you can get that too - its 
> sold for satellite systems that run dc on the coax to power the LNB at the 
> dish. It will generally be more expensive. Solid copper center conductor 
> will be listed as type BC (bare copper) in the datasheets.
>
> Sent from my iPhone
>
> On Jun 26, 2014, at 11:12 AM, "Timo Korhonen" <timo.korhonen at elisanet.fi> 
> wrote:
>
>> Hi all,
>>
>> We are putting up new beverages for 160/80 at OH5Z.
>> I have a question regarding the feedline. We have to make
>> quite long runs like 1500 feet.
>> When looking for a low cost 75 ohm coaxial I found a Belden
>> RG6 type cable which is reasonably priced.
>>
>> Here is a link for technical data
>>
>> http://www.farnell.com/datasheets/1733139.pdf
>>
>> This cable has a copper covered steel inner conductor.
>> Is this an issue on low frequency like 1.8 MHz with long runs like 1500 
>> feet?
>>
>> Thanks for your help
>>
>> 73, Timo OG9X
>> oh5z.wordpress.com
>>
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