Repeater Antenna RG-213 Power Loss

[WRZM243]

Would there be much power loss in connecting another 10 foot section of RG-213 to an existing 35 foot section of RG-213 already in place compared to one full section of 45 to 50 feet?

[tweiss3]

Each connector adds approximately 0.1db of loss. Other than the fact that at 50' you already have 4.4db of loss (64%) in power and sensitivity, the connector not a concern.

[WRZA485]

On 1/9/2024 at 5:12 PM, tweiss3 said:

Each connector adds approximately 0.1db of loss. Other than the fact that at 50' you already have 4.4db of loss (64%) in power and sensitivity, the connector not a concern.

RG-213 on the charts I have seen shows 5.2 dB loss per 100 feet. at 45 feet it should be a bit less than half that. https://www.w4rp.com/ref/coax.html

Additional connectors do have issues with the potential for water intrusion and corrosion. For a temporary installation it is not much of an issue, but for permanent installations the better practice is to have a single run.

[BoxCar]

6 hours ago, WRZA485 said:

RG-213 on the charts I have seen shows 5.2 dB loss per 100 feet. at 45 feet it should be a bit less than half that. https://www.w4rp.com/ref/coax.html

Additional connectors do have issues with the potential for water intrusion and corrosion. For a temporary installation it is not much of an issue, but for permanent installations the better practice is to have a single run.

And LMR400 has 1dB of loss for the same length.

[WRYZ926]

I run LMR400 or equivalent for all of my VHF and UHF base antennas.  You will definitely be better off using a single run of LMR400 for GMRS.