DL9FB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO51

Receiver-side FT8 activity involving DL9FB, decoded by SO8OO in southeastern Poland. 132 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-28 and 2026-08-21.

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 132 FT8 messages attributed to DL9FB as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (71%), followed by 40 m (21%) and 10 m (8%). The busiest six-hour window was 11:00-17:00 UTC, containing 48% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

132
Messages attributed
10
UTC dates decoded
22
Active 15-min windows
-11 dB
Estimated median S/N

Bands

40m · 28 20m · 94 10m · 10
First attributed message: 2026-06-28
Last attributed message: 2026-08-21 14:56 UTC

Observed FT8 message patterns

Attributed sample
132 messages
Active dates
10 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-19 to -3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 30, moderate (-15 to -9 dB) 55, strong (≥ -8 dB) 47.

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 DL9FB in decoded directed-looking exchanges:

Attributed messages by UTC hour

Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.

Most frequent locator attributed to DL9FB

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
JO51 · 77 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
779 km (approx.)
Last such locator decoded
2026-08-21 14:53 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 UTCBandDL9FB S/NCounterpartCounterpart S/NMsgsCapture
08-21 14:55 10m -5 / - IU2EBR -10 / - 3 ✓ Closing observed
08-21 14:52 10m -10 / - DO2KMB - / - 2 Partial capture
08-21 14:50 10m -12 / - F5ADE -4 / -4 5 ✓ Full exchange observed
08-21 14:49 10m -8 / +10 HB10GBT -14 / -2 2 Partial capture
08-21 14:48 10m -2 / - G1OZO - / - 2 Partial capture
08-21 14:46 20m +2 / - CT7AUT - / - 2 Partial capture
08-21 14:44 20m -1 / -9 ON4AOI +4 / +10 5 ✓ Full exchange observed
08-21 14:38 20m 0 / - LB6BK - / - 4 Partial capture
07-30 20:16 40m -3 / -4 DJ2MS -18 / -1 2 Partial capture
07-30 20:13 20m - / -22 TA3F -10 / - 3 ✓ Closing fragment
07-30 20:06 20m -14 / - 9A6ZZ - / - 2 Partial capture
07-30 20:03 20m -6 / -8 OS9T -4 / 0 8 ✓ Full exchange observed
07-27 21:04 40m -11 / - SM2SCK - / -22 2 Partial capture
07-27 21:02 40m -14 / - ON4MAP - / -10 2 Partial capture
07-27 20:59 40m -14 / - DH7ULX - / - 2 Partial capture
07-27 20:56 40m -12 / - UN7PPV - / -20 6 Partial capture
07-27 20:43 40m -10 / - DK6WS - / +7 2 ✓ Closing fragment
07-27 20:32 20m - / -2 RN6MA +3 / - 2 ✓ Closing fragment
07-27 20:21 20m - / -12 EA8UP +1 / - 2 Partial capture
07-27 20:16 20m - / -11 TA2AI +3 / - 3 ✓ Closing fragment
07-23 12:43 20m - / -9 SV5AZK -18 / - 2 ✓ Closing fragment
07-23 12:38 20m -19 / -4 TK5K -7 / +6 2 Partial capture
07-05 18:45 20m - / - UA3ZQN -1 / - 3 Partial capture
07-05 18:16 20m - / - F4BYA -8 / - 2 Partial capture
07-05 18:11 20m - / - TM2WWA -20 / - 4 Partial capture
07-05 17:54 20m - / - E70SZ -8 / - 2 ✓ Closing fragment
07-05 17:51 20m - / -3 IU5LAD -10 / - 2 ✓ Closing fragment
07-05 11:44 20m - / -12 PE1NPS -17 / - 2 Partial capture
07-05 11:37 20m - / -11 SV2HTW -10 / - 2 ✓ Closing fragment
07-05 07:50 20m -13 / - IZ2ARJ - / +3 2 ✓ Closing fragment
07-05 07:48 20m -23 / - 9A4AA - / -3 3 ✓ Closing fragment
07-05 07:42 20m - / +10 DL1TJ -9 / - 2 Partial capture
07-05 07:29 20m -19 / - UR5FBD - / -11 3 Partial capture
07-05 07:22 20m - / - OE5FIL -9 / - 5 Partial capture
07-04 19:50 20m -18 / - M0DPK - / -24 4 ✓ Closing fragment
07-04 19:46 20m -8 / - DL9KM -9 / -10 5 ✓ Full exchange observed
07-04 19:43 20m -14 / - E70A - / +1 2 ✓ Closing fragment
07-02 11:34 20m -8 / - K2I - / - 3 Partial capture
07-02 11:28 20m -5 / - KF0YOB - / -10 5 Partial capture
07-02 11:23 20m -6 / - KF0YOB - / - 3 Partial capture
07-02 11:22 20m -8 / - CR2WWA - / - 2 ✓ Closing fragment
07-02 11:20 20m -11 / - II1WWA - / +2 2 ✓ Closing fragment
07-02 11:17 20m -10 / - IR0WWA - / - 2 Partial capture
07-01 21:04 80m - / -4 HA7TM -7 / - 2 ✓ Closing fragment
06-29 14:53 20m - / - GJ0KYZ -6 / - 3 Partial capture
06-28 16:39 20m +1 / - DL1MKJ - / - 2 ✓ Closing fragment
06-28 16:36 20m -3 / -7 EC5M -12 / +3 4 ✓ Full exchange observed
06-28 11:05 20m -24 / - IQ4JO 0 / - 2 ✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

10m 
UTC    dB Audio  Message
144815  -2  782  G1OZO DL9FB JO51 (x2)
144900 -14 2311  DL9FB HB10GBT +10
144915  -8 2304  HB10GBT DL9FB R-02
145015  -8 1422  YO9HP DL9FB JO51
145045 -10 1420  F5ADE DL9FB JO51
145100  -5 1007  DL9FB F5ADE +18
145115 -13 1418  F5ADE DL9FB R-04
145130  -2 1007  DL9FB F5ADE RRR
145145 -13 1417  F5ADE DL9FB 73
145215 -10 1762  DO2KMB DL9FB JO51 (x2)
145515 -10 1066  DL9FB IU2EBR +28 (x2)
145600  -5 2294  IU2EBR DL9FB 73
20m 
UTC    dB Audio  Message
201430  -9  656  DL9FB TA3F 73
143800  +5  916  LB6BK DL9FB JO51 (x4)
144300  -4 2207  R2FAQ DL9FB 73
144330  -3 1976  <...> DL9FB JO51
144430  +0 1972  ON4AOI DL9FB JO51
144445  +6  745  DL9FB ON4AOI -09
144500  -5 1970  ON4AOI DL9FB R+10
144515  +2  745  DL9FB ON4AOI RR73
144530  +2 1969  ON4AOI DL9FB 73
144600  +2 1490  CT7AUT DL9FB JO51 (x2)
144700  -1  458  IK4LZH DL9FB JO51
40m 
UTC    dB Audio  Message
210045 -12 1396  CQ DL9FB JO51 (x3)
210215 -12 1398  ON4MAP DL9FB -10 (x2)
210415 -12 1399  SM2SCK DL9FB -22 (x2)
210545 -10  918  CQ DL9FB JO51 (x2)
201600 -18 1066  DL9FB DJ2MS -04
201615  -3  767  DJ2MS DL9FB R-01
202000 -17 1165  DL9FB F6DKQ RR73
202400  -5 1245  DL9FB R5AV -07
202415 -10 1246  CQ DL9FB JO51
202445  -9 1246  R9FDM DL9FB -16
80m 
UTC    dB Audio  Message
205630 -20 1782  DL9FB SN4WWA +10
205700 -20 1782  DL9FB RR73; DO1TEM <...> -18
210400  -8 1449  DL9FB HA7TM -04 (x2)

Decoder S/N history by band

Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.

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