Grid RK66 Band Conditions
Localized HF conditions for Maidenhead locator RK66. Coordinating at 16.50°, 173.00°. Updated with real-time telemetry from NOAA and DX cluster reports.
RK66 conditions are FAIR. Best bands: 10m, 12m, 15m, 17m, 20m. SFI: 137.
From the RK66 operating area, work the 18:06 UTC and 07:04 UTC grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses RK66.
Night operation should keep 20m on watch and move to 40m as the path darkens.
This square sits in a mixed-region footprint and is best used as a planning center for portable, field-day, and home-station band decisions.
- Latitude zone
- tropical
- Local phase
- Darkness
- Aurora exposure
- low at this latitude
- Grayline
- 18:06 UTC / 07:04 UTC
- Best high band
- 10m
- Nearest city
- the RK66 operating area
● Local Band Quality Scorings
Use this local score for RK66, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.
● Best DX Windows from RK66 — the RK66 operating area
Great-circle distance, short-path beam heading, the bands most likely open right now from RK66 to each DX region at SFI 137 / Kp 3, and a current verdict. "Open now" means a suitable band is scoring well on that path; "Try ~HH:MM" points at the next far-end grayline. Band picks and status are a planning heuristic, not a measurement.
| Target | Distance | Beam | Bands to try | Status |
|---|---|---|---|---|
| East Asia / Japan | 2,532 mi | 309° | 40m, 20m, 80m | Open now |
| Oceania | 3,559 mi | 206° | 40m, 20m, 80m | Open now |
| North America | 5,455 mi | 52° | 40m, 20m, 80m | Open now |
| South Asia | 6,104 mi | 292° | 40m, 20m, 80m | Open now |
| Europe | 7,727 mi | 348° | 40m, 20m, 80m | Open now |
| South America | 9,053 mi | 96° | 40m, 20m, 80m | Open now |
| Southern Africa | 10,220 mi | 247° | 40m, 20m, 80m | Open now |
● Band-by-Time Plan for RK66
A planning heuristic for the local day at RK66, built from sunrise 18:06 UTC, sunset 07:04 UTC, SFI 137, and Kp 3. Not a measurement — a starting point for where to listen as the day turns.
Grayline enhancement — low bands reach long distances as the terminator passes.
High bands rising with the sun; check 10m for DX.
Peak high-band window — 10m and 15m open widest.
Second grayline peak — 20m holds, then hands off to 40m.
Low bands own the darkness — 40m for DX, 80m regional.
Recent local activity
Spots touching RK66 and the adjacent squares
These are the newest 10m, 15m, and 20m reports where one side of the path sits in RK66, RK67, RK65, RK76, RK56. This gives the page unique, local context instead of a generic solar snapshot.
Top DX targets
Where this grid is reaching right now
Contest preview
Next major contest outlook
No contest event is currently loaded. For planning from RK66, start with 10m POOR, 15m POOR, 20m FAIR and keep 20m available as the safest all-around fallback.
Open contest calendarNearby grids
Four adjacent squares for internal path checking
Regional hub links