Much easier to set up a proper Pyramid mobile repeater.
And you can find them used for pretty cheap.
Issue with the Cheap Chinese Radios is that the filtering is poor to non-existent, and that will be a requirement for any sort of mobile repeater setup.
I understand wanting to save money and go cheap, but it gets to a point where you need to do it right if you want it to work. Cutting corners is going to lead to disappointment.
There are two ways of doing this:
In band and out of band.
Out of band is where the mobile repeater transmits on a separate band from the primary mobile radio. That's an ideal setup. Easier to install.
In band is where the mobile repeater transmits on the same frequency as the primary mobile radio. If you go this route, you have to have frequencies that are well separated and you still need to be looking at proper filters, or the radios can overload the front ends of the receivers and it's not going to work worth beans.
Using an out-of-band setup might be something you can handle if you've got some experience.
Don't attempt an in-band solution unless you've got some experience under your belt as well as a service monitor or tracking spectrum analyzer. Also, your mobile radio needs to allow for the interface.
Lots of Pyramid SVR-200's on e-Bay, some in the $20.00 range.
Looking at your post again, I might be off track. When I read "mobile repeater", I'm guessing you are talking about an extender from a mobile radio.
If you are talking about a portable repeater setup, you are still in the same boat. Trying to use CCR's with little to no filtering, lack of FCC certification, as well as not having the proper interfaces on the radios will be a headache.
You can do this with a couple of good mobile radios (not the cheap Chinese stuff), a mobile duplexer and a controller.
But again, unless you have the tools, experience and test equipment to set this up, you really are better finding a used repeater setup and getting it programmed/tuned to your needs. This won't be cheap, but you can find simple repeaters on e-Bay for reasonable prices. Getting a setup with a couple of Motorola CDM's would be a good start. Look at the Motorola CDR700's.
https://www.ebay.com/itm/Motorola-C...832881?hash=item2ccfdb8bb1:g:Z80AAOSweUFakeIz
Shop around for a better price, but getting a box with all you need and having it set up by a pro would be much easier, especially if you want it to work well.
