YF3BBB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Indonesia Most frequent locator attributed to this token: OI61

Receiver-side FT8 activity involving YF3BBB, decoded by SO8OO in southeastern Poland. 66 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-06-18.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 66 FT8 messages attributed to YF3BBB as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (61%), followed by 20 m (39%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (89%); the estimated median was -19 dB.

Overview

66
Messages attributed
3
UTC dates decoded
10
Active 15-min windows
-19 dB
Estimated median S/N

Bands

20m · 26 10m · 40
First attributed message: 2026-06-09
Last attributed message: 2026-06-18 15:32 UTC

Observed FT8 message patterns

Attributed sample
66 messages
Active dates
3 UTC dates
Estimated median S/N
-19 dB
Estimated 10th-90th percentile
-23 to -15 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 59, moderate (-15 to -9 dB) 7, strong (≥ -8 dB) 0.

WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with YF3BBB in decoded directed-looking exchanges:

Most frequent locator attributed to YF3BBB

The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.

Attributed locator
OI61 · 22 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
10,816 km (approx.)
Last such locator decoded
2026-06-18 15:32 UTC

A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.

Observed FT8 exchanges

S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.

Time UTCBandYF3BBB S/NCounterpartCounterpart S/NMsgsCapture
08-27 17:16 20m - / -17 F5PBG -2 / - 2 ✓ Closing fragment
08-27 15:46 20m - / -16 MM0JTV 0 / - 3 ✓ Closing fragment
08-16 05:55 10m - / -4 UA6NT -24 / - 2 Partial capture
08-09 13:54 20m - / - ON6AA -12 / - 2 Partial capture
08-09 12:37 20m - / - DL6ZW/P -19 / - 2 Partial capture
08-06 14:36 20m - / - RD6OZ -24 / - 2 ✓ Closing fragment
07-29 15:20 20m - / - OK4SD -6 / - 2 Partial capture
07-26 16:11 20m - / - DK9ZQ -14 / - 2 Partial capture
07-26 16:09 20m - / -17 PD1B -12 / - 2 ✓ Closing fragment
07-26 16:01 20m - / -11 R4HJN -6 / - 2 Partial capture
07-26 15:55 20m - / +2 DC8SG -6 / - 2 ✓ Closing fragment
07-13 14:38 20m - / -15 GM4FDM -8 / - 2 ✓ Closing fragment
07-07 16:06 20m - / - OE9GWV 0 / - 5 Partial capture
07-07 15:42 20m - / - OK1DVN -14 / - 3 Partial capture
07-07 15:42 20m - / - ON8BB -12 / - 3 Partial capture
07-07 14:18 20m - / - PD7JLP -21 / - 4 Partial capture
07-06 16:51 20m - / -18 EA5KBG -15 / - 2 Partial capture
07-06 16:47 20m - / -13 UT5ZC -18 / - 2 ✓ Closing fragment
07-06 16:31 20m - / - DL1R -2 / - 7 Partial capture
07-06 16:28 20m - / - DL1RB -11 / - 3 Partial capture
07-06 16:23 20m - / - DL4JCP -8 / - 3 Partial capture
07-03 10:30 10m - / -16 EA3NE -11 / - 5 ✓ Closing fragment
07-02 16:53 20m - / -22 E77FN -16 / - 2 ✓ Closing fragment
07-02 16:53 20m - / - EB5AL -15 / - 7 Partial capture
07-02 16:43 20m - / - IV3GOW -18 / - 2 Partial capture
07-02 16:27 20m - / - EB3JT -14 / - 4 Partial capture
07-02 16:22 20m - / - MM8WXA -8 / - 2 Partial capture
07-02 16:21 20m - / - GW4RDW +3 / - 2 Partial capture
07-02 15:02 10m - / -17 R6FMF -18 / - 5 Partial capture
06-29 16:10 20m - / -8 DA0WWA +14 / - 2 Partial capture
06-25 16:56 20m - / -17 YO4NF -8 / - 2 Partial capture
06-25 16:34 20m - / -13 YO4DWD -18 / - 2 Partial capture
06-25 16:33 20m - / -14 UA4HBJ -15 / - 3 ✓ Closing fragment
06-25 16:30 20m - / -11 IU1CIW -7 / - 4 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

20m 
UTC    dB Audio  Message
143700 -15 1889  YF3BBB F1ODM -13
143800 -24 1888  YF3BBB RD6OZ 73
123700 -18 1764  YF3BBB DL6ZW/P JN37 (x2)
135415 -19 1578  YF3BBB ON6AA JO11 (x2)
140900 -19 2301  YF3BBB YT1MP -06
142545 -15  754  YF3BBB 9M2RSI R+12
154600  -3 1348  YF3BBB MM0JTV -16 (x3)
171200 -11  343  YF3BBB S57TW -10
171330 -17 1897  YF3BBB PD2PE JO21
171600  -3 1892  YF3BBB F5PBG R-17 (x2)
10m 
UTC    dB Audio  Message
150200 -18 1640  YF3BBB R6FMF -17 (x5)
101830  +0  604  YF3BBB EB3EAW -13
103045  -7 1873  YF3BBB EA3NE JN11 (x5)
055500 -24 1890  YF3BBB UA6NT R-04 (x2)
141100  +7 2890  YF3BBB 9A3YV JN86

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