At 1/3/2009 10:32, you wrote: > I used to find several things creating noise problems. > One is a noise on 145.250 Mhz, caused by leakage from cable systems. > I could drive or walk around Hughson california and find so many spots >where it leaked from poor connections, and so on.
Back when cable was only used to deliver OTA stations to areas shadowed from the TV TX sites, I could receive a carrier on 145.25 from a cable system 3 miles away from me (closest point). As I drove toward it the signal got stronger & there were no other CATV systems in the area, so I knew it was from their system. Once "inside" the system there were full scale signals all over the place. It'd be interesting to calculate the total radiated ERP of that system given the signal strength, gain of the RX antenna I used & average distance from the system. Bob NO6B
