resistance

Hi, I'm relocating some of the antennas that I have and I came across the Gainmaster that I have on a 6m aluminium pole (on a 2m high extension roof) and I plugged it to my meter and it shows as having between 15 to 25 omhs across the 11m band. The coax used is 3m long RG213 cable and the...

-sorry, not sure if this is the right area- I have a Motorola CDM1550-LS+ transmitting at 48w on UHF. With a 5 foot cable, my SWR meter shows about 0.5. With my 25ft cable made out of some fairly cheap cable (RG58), I'm getting about 4 on the meter, just inside the red. I don't need the signal...