Interference across 6metre band in Frenchs Forest, NSW area
Over last couple months the interference has become worse across 6metre band, more noticeable, whilst scanning the 6metre FM repeater segment, I did a sweep from 46-60 Mhz and found there is wide band signal covering 52.500 to 57 MHz, the signal strength varies from s5 to s9 across that segment.
I suspect it radiating from Northern Beaches Hospital, possibly some piece of medical scanning equipment.
If scan across the band with a narrow band receiver, it just seems like white noise, but the signal strength meter shows there is something there.
This happened a few years ago and I tracked it to the hospital.and suddenly it went away.
UPDATE: 19 Feb 2026
I spent some time doing better sweep, due to hearing some sort of buzz sound opening the mute on a repeater output frequency. Superimposed on that buzz sound is a click at approximately 1 per second rate, noted in the morning, afternoon and night at times when I checked. I swept from 46 to 60 MHz, these are the frequencies I noted the buzz sound on.
these following frequencies were weak s0 but clearly audible :
50.030 50.060 51.280 51.870 52.140
these following frequencies were strong ie. s5 to s9 :
52.440 53.080 53.640 53.690 54.240 54.280 54.840 55.500 56.050 56.090
these following frequencies were weak s0 but clearly audible :
57.270 57.310 57.900 58.470 59.110 59.680 59.720
Overall, the raised S-meter was from 52.500 to 57 MHz, where as the narrow bandwidth buzz sound is heard from 50MHz to 60MHz
