There are too many variables to say for sure. You will likely need to run your cable and see what results you get.

Attenuation for RG-6 is approx. 10db/100ft.

Is there a specific reason for asking?

One thing to remember is this:

Engineering basics related to cable say use the 3 "S"s.
1. shielded -always use shielded cable
2. short - always use the shortest cable to do the job
3. single - and avoid using connectors to extend cable length

It will be a factor in your installation if you ignore these simple rules. It is especially important to avoid connections by using a single cable.

Rg Each F-81 barrel connector that you put in a run will attenuate (lessen) your signal by approx. 1 db. What is worse than that is that there is no shielding at connections allowing ingress of EMI that will also affect your signal quality. Avoid connectors.

Hope this helps.

Hi Jeff,

I like your 3 S's. Very good tip!

Your cable loss estimate is a bit too high. See: Antenna Basics

Typical loss for rg-6 cable ranges from 1.5 to 6 dB per 100 feet of run and varies with channel frequency.

Best,

Rick

Here in Houston, we have a different way to measure that.

It's in Feet Rising, not Inches Falling.

Have a good Day!
S.W.

Originally Posted by IDRick

Hi Jeff,

I like your 3 S's. Very good tip!

Your cable loss estimate is a bit too high. See: Antenna Basics

Typical loss for rg-6 cable ranges from 1.5 to 6 dB per 100 feet of run and varies with channel frequency.

Best,

Rick

But..Couldn't that figure be different among different manufacturers at different frequencies? I have a Belden cable catalog, and I will try to remember to look it up and see what they say it says for their brand of RG-6.

Is this it ?

Belden Spec Sheet
bottom of Page.

Have a good Day !
S.W.

Originally Posted by IDRick

Correct, it does vary by cable manufacturer, specific cable design/components, and frequency. Apologies for not stating that in my original comment... 6dB loss per 100 ft is a common number used for estimating distribution losses on the web. That number is too high for my specific cable and the available channels in the area but really didn't overestimate distributions losses too bad (< 2 dB).

I have a Belden cable catalog that states Belden RG-6U series number 8238 at 400 mHz. that the loss factor is 4.2 dB per 100 feet, and at 700 mHz, it is 5.8 db per 100 feet. This is 18 guage center conductor with 97% shielding.