Pretty sure these first became available in the 1970s. They were based on a 10m rig and they revolutionised 2m.
I got one second hand and was amazed how far I could work on a very basic antenna. Prior to getting my Liner-2, I had only used QRP AM and FM rigs. Most nights I found I could contact stations hundreds of kilometres away.
Later many used the ICOM IC-202 with a 30W amplifier and Tonna 9 el antenna.
These days the bands at VHF are far quieter as people have other ways of chatting (the internet) and working DX (FT8).
See https://sites.google.com/view/g3xbm4/home/vhfuhfmicrowaves/vhfuhf-commercial-rigs/belcom-liner-2
























