Topband: RG-6 Coaxial Cable...

Tom Rauch w8ji at
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 
this source:

73 Tom 

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