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

["ZR" <zr@jeremy.mv.com>]

Commscope, Times and what ever else quality distributors such as Tessco 
carry are what I suggest.
Also see about buying from the local CATV installation contractors.

Carl
KM1H



> 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@starpower.net>
> > > Subject: Measured RG-6 Loss: Solid Copper vs. Copper Clad center 
> > > conductor
> > > To: topband@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
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