I have a discone antenna with a vertical element extending off the top of the unit. Would adding a longer element to the top of the discone antenna affect the performance of the antenna? good or bad that is.
I have been dealing with analog simulcast issues for awhile. I had bought a Centerfire discone with a vertical element tuned to the MURS frequencies of 151 mhz. The analog simulcast channels that I monitor were creating TERRIBLE distortion and these departments recently changed frequencies to the 151 band on their simulcast systems. Today, I had the idea to "remove" the vertical element and it has all but eliminated the distortion. The discone radiation zone was coupling with the radiation zone of the top element causing the nasty distortion. Comms are normal now.
I don't want to hijack this thread, but would buying a discone antenna (designed without a top element), perform better than the centerfire?