Volvo Antenna

The reason for 8x was that they needed a high-power coax for commercial low freq VHF radio installs in newer cars. RG8 wasn't working for them and 75 ohm stuff was out of the design scope for solid state radios.

 

That's interesting, I didn't know that. To me the RG 8x is a good coax to use on the HF bands. Seems to work fine for base or mobile. I've seen it rated at 2kw or 3kw depending on which dealer you want to believe. Either way it will handle the amplifiers that most people use I'm sure.
They claim the RG8x isn't good for VHF, which seems to be true. I have an old Yaesu 2800 in my radio room at home, and I'm using around 25 feet of RG8x to reach a 1/4 wave attic antenna. On high power (65 watts) the SWR does climb up, but that's not a problem since most of my contacts have been 5 to 10 watts.

 

Yeah for 2m it isn't that good, below 6 it works ok, but it was 30-50mhz is what the target group was.