Topband: RG-6 Coaxial Cable...
w8ji at contesting.com
Thu Sep 14 07:39:12 EDT 2006
> RG6 that I have used is a double shielded (aluminum)
> flooded cable. The stuff is great. It's cheap, light
> weight, small form factor, and low loss. You don't
> indicate how you are using it, but remember that it has a
> fairly low voltage rating--I've seen 600v when it's
> rated--Lord only knows how low when it's not voltage rated
> by the manufacturer. Any SWR and you better be talking
> about receiving applications.
Typical RG6 coaxial cables, like all coaxial cables I have
tested, handles a lot more voltage than anyone would expect
by looking at ratings. I know this because I not only buy
and use it by the pallet load, I also measure cable samples
for a couple cable manufacturers.
The limit to my HV tester is 15kV peak. Other than RG6
batches with the center conductor way off center through a
dielectric defect (like poorly formed foam that is all
powdery) I can go right up to the limit of my tester on most
I don't know where the voltage ratings coaxial cable
manufacturers use comes from, but it has to be one of the
most useless ratings I have ever seen.
By the way on 160, 80, and 40 meters RG6 will easily handle
1500 watts in free air. I use it for dipole feedlines on
occasion to save weight.
> better off. I've also had to throw away more than one
> F-to-BNC adapter right out of the box (AC/DC open circuit
> and no clue why). I have no experience with a F-to-UHF as
> you describe (it would be an expensive mutant adapter if
> you can find one).
When I was in CATV/MATV plant design we used F to 259's, so
I expect they are still available. A search on Internet
pulled up a dozen sources in the price range of $3.00, like
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