[Boatanchors] Old RG-8 cable antennuation at 430MHz

[HL1FB]

Hello;

 I experimented 430MHz atennuation with 3 different RG8 cables.

I connected a RG8 cable terminated with a 50 ohm dummy load and applied

30W 435MHz output from Icom IC2720. I connected a Bird wattmeter at the output

of the IC2720 and another one at the dummy load. So the difference of power

indication is the loss of the cable under test.

 

Old RG-8 5.3 meter long indicated 33% loss of power.

Another old RG-213 6.3 meter long indicated 19% loss of power.

New RG-8 cable 11.9 meter long (different brand) showed only 20% loss of power.


So it looks like new cable has much low antennuation.

Is this normal? Does someone has experience with this?