Interference from cellphone towers

[far342]

Sorry if this isn't the right place to post this thread. There are about 3 spots in my city with cell towers that block the signal of a 700mhz trunked system I monitor. I get up to maybe 1200 feet away from any one of the towers and the control channel signal just drops completely. It happens on my 436 with my vhf antenna and my 700-900 mhz antenna. This also occurs with my friend's sds100 & 200. Is there any way to fix this? I have yet to play around with filters as I don't yet own an sds.

These are the sites we monitor that this occurs with: Site 1, Site 2