This should raise some eyebrows

So adding a coax switch to run a different ant on a diff freq will decrease rec i assume??
Been thinkin on useing two ant with a switch and use one for cb and 2nd for a different band kinda thing,will that cause both ant to fight one another or help with directional tran/rec..

 

no.

remember that you are working with a frequency that isn't sensitive to losses as upper vhf/uhf systems. You will have more losses within the antenna/coax itself than the switch being in line.

What many don't seem to get is at the level of noise floor -135 or what ever achieved, it does not matter. Once you get into the issue of these designed, there are other problems with internal noises (no one seems to tackle that) and outside issues with band conditions, especially being mobile, that number goes up drastically. The front end is part of the entire system, there is a complete mixer/if string that has to be considered before making a huge deal over the front end - especially when they are broadly tuned.

If you want to actually achieve that low noise floor, put a pre-amp in front of the radio, that seems to work.

 

hhhmmmm..maybe thats something to look into..One ant tuned for cb and 2nd for side band stuff all on a switcher...Now i gotta find out if ill need a specific length of coax from radio to ant switch and then go with my 15'3" to each ant..
O well another project to start i spoze..

 

That was my thinking when i built my set up, no splitter just change coax.

 

-135 Is meaningless when you come to the truth that there is more to it within the radio. I don't see the need for the sales pitch as it is being told here without some real explaining on how the entire system works or where the other improvements need to be made to make the radio effective.

There is a lot more to feed lines than coax or no coax. No proof that one is always better than another, it comes down to how the antenna system is designed, balanaced or unbalanced.

However the critical issue isn't even with the length itself, because you are using less feedline/coax than most systems, under 100 ft, so when you guys describe that you need to keep it all rf tight, it is just plain laughable.