Interference across 6metre band in Frenchs Forest area,

 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

6metre repeater status in and around Sydney and NSW , as of 29th August, 2025

 6metre repeater status in and around Sydney and NSW that I know of, as of 29th August, 2025,

53.625 VK2RSN, Mt.Sugarloaf, Newcastle, back on air July 2025, requires 91.5Hz tone

53.650  VK2RMP, Maddens Plain, Illawarra,  operational, requires 123Hz

53.675  VK2RMB, Terrey Hills, off-air

53.700  VK2RGN, Goulburn, off-air

53.725  VK2RAG, Somersby, Central Coast, operational, requires 91.5Hz tone, linked to 23cm rptr

53.800  VK2RCN, Port Macquarie operational

53.825  VK2RBE, Bethungra operational

53.850  VK2RWI, Dural, operational

53.875  VK2RBM, Blue Mtns, operational, requires 91.5Hz tone

52.525 FM Simplex - still plenty activity, particularly Sunday morning after ARNSW broadcast

New Zealand (ZL) Repeater Listing

 I stumbled onto this site whilst trying to check the status of the ZL 6metre repeaters.

The ZL's got a good set of repeaters spread across the two islands, including some 900Mhz,(33cm) and of course 23cm repeaters.

The only repeaters they don't have are 10metre repeaters (ie 29MHz)

Be nice if they tied some of their 23cm repeaters, or 900Mhz, etc, to their 6metre repeaters such as Klondike, Climie and Christchurch, that  would create some activity over in ZL when 6metres is open.

vhf.nz/maps/repeaters.html

6metre voice repeaters in and around Sydney as of July, 2023

  6metre Repeater status as of 26th July, 2023

VK2RAG, Somersby, 53.725 MHz  requires  91.5 Hz  CTCSS tone  - they run Sunday WIA b'cast and callbacks

VK2RWI, Dural, 53.850 MHz - working,  WIA Sunday b'casts supposedly will  move to here from 52.525MHz simplex

VK2RBM, Blue Mtns, 53.875 MHz - working,  requires 123Hz CTCSS

VK2RMP, Maddens Plains, 53.650 MHz  - working,  requires 123Hz CTCSS

VK2RSN, Mt Sugarloaf, Newcastle, 53.625 MHz    unknown status, nil response, I tested this in December 2022 when up that way.

VK2RGN, Goulburn, 53.700 MHz, off air according to the Goulburn ARC website.

VK2RMB, Terrey Hills, 53.675 MHz, still off air and still planned to return it to service.

VK2RCN, Telegraph Point, Port Macquarie, 53.800 MHz, working, requires 91.5Hz CTCSS tone

VK2RSM,  Adaminaby, Snowy Mtns, 53.575 MHz, requires 123Hz CTCSS tone

VK2RSC, Lismore, 53.550 MHz, working, now requires 123Hz CTCSS tone