I'm trying to put a repeater up and cannot get any distance out of it. Does the length of coax from duplexer to radio have any influence on the system also not sure if I have a good grade antenna so any help will be greatly appreciated
I have a Ken wood vhf and a Chinese brand duplexer with a fiberglass antenna not sure the brand but it sounds like it may be way over my head since I know nothing about the in and outs of this
Feedline is about 60' of rg58
Antenna is about 30'
Kenwiod tkr 750
The jumpers are different lengths one is about 24" and one is 16"
Antenna is a fiberglass about 4' in length but model is unknown
And connectors are a assortment of types
And it is located in my home for a farm king operation
I know this is pretty vague so any info will be helpful
Agreed. He needs the help of a reputable two way radio vendor.I'm not going to offer any suggestions except for having someone familiar with setting up repeaters and with proper test equipment to diagnose your problem on site. Anything else is a complete wast of time.
EPCOM's VHF flat pack is rated at a 4.5 MHz split but will handle 4.4 MHz. Don't see flat packs manufactured in North America that can handle much narrower. I know the Chinese (Jensen) advertise a 3.5 MHz split flat pack but I've never ordered one.What is your frequency pair or the spacing between tx and rx? The small flatpack VHF duplexers around 6" X 8" X 1" are rated for a 5MHz minimum split which is wider than the 2m band. For a 1MHz split you usually need a large 4 cavity duplexer with minimum 4" dia cavities that's about 2ft tall and preferably a pass/notch type. For a 600KHz split you really need a 6 cavity model.
New they run at least $1k on up for a 4 cavity and upwards of twice that for a good 6 cavity. You can find used ones much cheaper but they are still hundreds of $$ if in good shape and tunable across the 2m amateur band.
Sorry - I thought you were just joking. I got the impression he was a novice installing something on the cheap, with bodge up bits and a small budget - rather than a commercial quality install? The bits and pieces he has would cost around £500 here, so I assumed a somewhat lower level of performance, but not zero performance which is what he's getting. One of mine manages between 5 and 8 miles on handhelds in this part of the UK, and the required range submitted to the authorities was 5 miles as a service area - and they put a limit of 5W on my 3dBd antenna, at 10m agl.