We have several repeaters and they all work fine with LMR400 cables. That said I am in the process of upgrading the cabling to hardline for the fixed repeaters that are not already using it. Our mobile repeaters get transported onsite and then setup in the field. So the cabling needs to be more flexible and more tolerant to weather. We do seal the connectors each time they are set up.
So I wanted to get input on the mobile repeater cabling. Some have duplexers so I am targeting those first. The longest cable currently is 40 feet. I am looking at Commscope FSJ2-50B 3/8 inch superflex but I don't know if my 40 foot run would work just as well with 1/4 inch Commscope FSJ1-50A? If I calculate the loss by using 40% of the loss per 100 foot I come up with 1.56 db for the 1/4 and 1.05 db for the the 3/8. With the repeater at 25 watts I calculate that to be about a 5 versus 6 watt loss. That is acceptable for the use the repeater will get.
I just basically want to know if there is any special reason to go with 3/8 over 1/4?
I would also like to update the jumpers in some of them as at least one repeater has LMR195 for the jumpers.
So I wanted to get input on the mobile repeater cabling. Some have duplexers so I am targeting those first. The longest cable currently is 40 feet. I am looking at Commscope FSJ2-50B 3/8 inch superflex but I don't know if my 40 foot run would work just as well with 1/4 inch Commscope FSJ1-50A? If I calculate the loss by using 40% of the loss per 100 foot I come up with 1.56 db for the 1/4 and 1.05 db for the the 3/8. With the repeater at 25 watts I calculate that to be about a 5 versus 6 watt loss. That is acceptable for the use the repeater will get.
I just basically want to know if there is any special reason to go with 3/8 over 1/4?
I would also like to update the jumpers in some of them as at least one repeater has LMR195 for the jumpers.
Replacing LMR400 for repeaters
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