[Amps] RG6 question

[Glen Zook via Amps]

I replaced the matching sections in my pair of 40-meter phased verticals with RG-6/U and, so far, haven't had any problems running 1400-watts with the array.  The particular RG-6/U that I used has a velocity factor of 0.81 (as measured by me).  From various specification sheets found on the Internet, depending on manufacturer, the velocity factor ranges from about 0.80 to 0.84.  These sections are just over 23-feet long.

Because of the different velocity factors, I definitely suggest actually measuring the velocity factor before using the cable in applications in which the velocity factor plays a role.
 
Glen, K9STH


Website:  http://k9sth.com


On Tuesday, June 17, 2014 2:11 PM, Jim Brown <jim at audiosystemsgroup.com> wrote:
 


On 6/17/2014 10:53 AM, Carl wrote:
> Do any list RF power and voltage specs? 

Some do, some don't. Like anything else, some mfrs publish better data 
sheets than others. For example, compare Fair-Rite's data sheets with 
any other mfr of ferrite parts.

Nearly all list the composition of the center conductor and the shield. 
Most commonly available RG6sare designed for CATV/MATV, with copper clad 
steel center, a thin Al foil shield, and maybe a thin braid. It doesn't 
take much more than common sense to figure out that a thin foil shield 
won't handle much power, and at MF and HF will be pretty lossy. There 
are others with a solid copper center and a more robust braid. Belden 
makes an RG6 with a double copper braid shield. I found a similar cable 
with Pasternak's name on it in a surplus house, and grabbed it at a very 
good price.


73, Jim K9YC
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