Topband: Measured RG-6 Loss: Solid Copper vs. Copper Clad center conductor

[Merv Schweigert]

I have been watching this thread with interest,  I am preparing to put up a
receive array and it will have to be some distance from the shack.
Is there a brand of RG-6 that someone has tried that is recommended?
Or some idea of a good name to look for.
Shipping to Molokai is more than 1000ft of coax costs, so need to make
the right choice the first time.
Not sure at this point of exact feedline length but will be more than 
1000 ft.
I see commscope RG-6 burial type orange on Ebay,  anyone tested that and
is commscope decent material?    I will have to bury it due to mongoose
chewing on most anything laying on the ground,  they chewed through teflon
coated wires for beverages that laid on the ground overnite before getting
erected.
Thanks  73 Merv K9FD/KH6


> Several topbanders asked if I would measure the DC resistance of the solid copper and copper clad steel center conductors of the RG-6 coax for which I published the RF loss measurements.  I also measured the quad-shield DC resistance, both cables measured the same.
>
> Here are my measurement results:
>
> Solid copper:       0.6 ohms per 100 feet
> Copper clad steel:  1.9 ohms per 100 feet
> Quad shield:        0.3 ohms per 100 feet
>
> It appears that copper clad steel RG-6 is a good choice for remote powered preamps and relays except for very long cable runs.
>
> When using a remotely powered device its extremely important to prevent even the slightest moisture entry.  RG-6 compression connectors are NOT waterproofed at the threaded end of the connector, additional waterproofing is absolutely essential.
>
> The Thomas & Betts NS500 Nut Seal costs only a few cents and it very effectively waterproofs the connector threads.
>
> http://www.ebay.com/itm/NEW-LRC-AUGAT-THOMAS-BETTS-NS-500-NUT-SEAL-50-LOT-/160703026841
>
> The inside of the connector should be stuffed with STUF Di-Electric Filler to prevent moisture accumulation from condensation.  The finished connection should first be wrapped with electrical tape, then a final layer of waterproofing should be applied such as Coax-Seal moldable tape.
>
> 73
> Frank
> W3LPL
>
>
> ---- Original message ----
>> Date: Wed, 23 Jan 2013 17:58:31 -0500 (EST)
>> From: <donovanf at starpower.net>
>> Subject: Measured RG-6 Loss: Solid Copper vs. Copper Clad center conductor
>> To: topband at contesting.com
>>
>> Today I measured the difference in loss (dB per 100 ft) between solid copper (SC) center conductor RG-6 vs. copper clad steel (CCS) Quad-Core RG-6 coaxial cable.  The difference is not significant until cable lengths exceed 350 feet.  You can see the affect of the steel core at 7 MHz and below in this table.
>>
>> The cables were manufactured by two different companies, but the relative measurements should be valid.
>>
>>        Solid   Copper  Cable length in
>> Freq   Copper  Clad    feet for a 1 dB
>> MHz    Loss    Loss    loss difference
>>
>> 1.8    0.3     0.6          350
>> 3.5    0.4     0.6          500
>> 7.0    0.6     0.8          500
>> 10     0.7     0.85         650
>> 14     0.75    0.9          650
>> 21     0.9     1.0         1000
>> 28     1.0     1.1         1000
>>
>> 73
>> Frank
>> W3LPL
> _________________
> Topband Reflector
>