This might be the right place, I need some advice first off I was using a Centerfire antenna and a Pro-197 both are 50 ohm with 75 ohm rg-11and I got some 50 ohm lmr 400 and it was worse so I bought a Sirio GP6-E antenna with 3-5 gain and it did good for one day and it's not good again, I changed one connecter, should I go back to the rg-11 even though 50 and 75 ohm mismatch, What should I do any information is appreciated