4S6TMP.com — VHF repeater listing plus RSSL infrastructure and net schedule (SL Time / UTC)
Most analog VHF repeaters in Sri Lanka traditionally utilize Carrier Squelch (No Tone) or an old-school 1750 Hz audio tone burst for activation rather than continuous CTCSS sub-audible tones, though newer setups and digital bridges are adapting.
| Location | Output Freq (MHz) | Input Freq (MHz) | Shift | Access Tone / Mode | Status |
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RSSL hosts one of the Northern California DX Foundation (NCDXF) international HF beacons in Sri Lanka. The beacon operates under the callsign 4S7B and transmits automatically on a coordinated schedule across several HF bands, providing propagation reference data to amateur radio operators and researchers worldwide.
More information: 4S7B HF Beacon ↗
The RSSL operates an Echolink node (4S7RS-R) running 24 hours a day, 7 days a week, linked to the RSSL repeater network. This allows licensed amateur radio operators anywhere in the world to connect to the RSSL network via internet-linked radio.
To connect, search for 4S7RS-R in the Echolink directory.
All times converted to UTC using Sri Lanka Standard Time = UTC+5:30 (no daylight saving).