[TowerTalk] Fwd: F-connectors

[Jim]

Agreed Jim!

Thanks
73
Jim W7RY

On 3/14/2019 1:38 PM, Jim Brown wrote:
> On 3/14/2019 10:30 AM, Kirk Kleinschmidt via TowerTalk wrote:
>> The cable has loss figures equivalent or slightly better than generic 
>> RG-8
>
> Physics from an alternate universe! At least three reasons why this 
> cannot be true.
>
> First, the center of most CATV coax is CCS, which is equivalent to 
> solid copper at VHF/UHF, but not below 5 MHz, where most hams use it. 
> Second, the shield is Al and often flimsy, so shield resistance is 
> greater than coax with a decent copper braid. Third, because the 
> shield diameter of RG6 cables is much less than RG8, resistance is 
> greater due to conductor diameter.
>
>> , and if you want even better specs, use RG-11.
>
> Yes. But for the reasons noted above, I use RG11 cables like Belden 
> 8213 and a decent  equivalent mfd for Davis RF. I've measured loss of 
> the Davis cable and 8213 with a VNA, and found them equivalent.
>
> 73, Jim K9YC
>
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