STL radio link

[radium98]

Hello i am trying to make a radio link between 130-180 mhz with thoses equipment and i need more help and ideas that i can do or anyoneone have experience in hand
i modified pira 1w vco to work on other frequency
i used universal pll that lock from 50-1300mhz
expected power max 5w need range 3-4 km
any more ideas are apreciated all must be homebrew or diy
thanks .

[Albert H]

Forget 130 - 180 MHz. In most of the world, that includes aircraft, marine, amateur and other radio services. Where in the world are you?

[radium98]

i am in lebanon beirut but any other frequency will work to me in vhf band i see that an answer is deleted

[Albert H]

If you don't have DAB Band III radio there, you could use 180MHz.

You need a selective and sensitive receiver, and your link frequency should be well away from two times your main transmitter frequency, to prevent the receiver seeing second harmonic, and becoming desensitised (or even completely jammed).