DF4BJ — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO42

Receiver-side FT8 activity involving DF4BJ, decoded by SO8OO in southeastern Poland. 308 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 14 UTC dates in the available aggregate history. Observed between 2026-08-09 and 2026-10-16.

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 308 FT8 messages attributed to DF4BJ as the transmitting token by decoded message structure across 14 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (97%), followed by 40 m (1%) and 80 m (1%). Most decodes (72%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

308
Messages attributed
14
UTC dates decoded
56
Active 15-min windows
-15 dB
Estimated median S/N

Bands

80m · 3 60m · 299 40m · 4 20m · 2
First attributed message: 2026-08-09
Last attributed message: 2026-10-16 21:37 UTC

Observed FT8 message patterns

Attributed sample
308 messages
Active dates
14 UTC dates
Estimated median S/N
-15 dB
Estimated 10th-90th percentile
-20 to -10 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 131, moderate (-15 to -9 dB) 163, strong (≥ -8 dB) 14.

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 DF4BJ 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 DF4BJ

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
JO42 · 237 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
934 km (approx.)
Last such locator decoded
2026-10-16 21:37 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 UTCBandDF4BJ S/NCounterpartCounterpart S/NMsgsCapture
10-16 21:33 60m -13 / - VE1YX - / - 9 Partial capture
10-16 21:07 60m -17 / - YO4BEW - / -7 4 Partial capture
10-16 21:03 60m -18 / -5 F5NHG -22 / - 2 Partial capture
10-16 21:01 60m -18 / +5 OE9RWH -3 / - 5 ✓ Full exchange observed
10-16 20:43 60m -10 / -11 G0OXO -11 / -6 8 ✓ Full exchange observed
10-16 20:37 60m -14 / - GM3CQD - / -10 4 ✓ Closing fragment
10-16 05:36 60m - / -15 IK1WGX -8 / - 3 ✓ Closing fragment
10-15 06:00 60m - / -13 DL5CK -10 / - 3 ✓ Closing fragment
10-15 05:57 60m - / -9 OT4N -14 / - 3 ✓ Closing fragment
10-15 05:34 60m - / -19 YT2ZE -6 / - 2 ✓ Closing fragment
10-15 05:08 80m - / - F1PSX -12 / - 2 ✓ Closing fragment
10-15 05:04 80m - / -21 SP1MGM +8 / - 4 Partial capture
10-15 04:50 60m -15 / - IZ0MQN -23 / +8 3 Partial capture
10-15 04:48 60m -17 / - KT4ZX - / - 3 Partial capture
10-15 04:42 60m -10 / - K8CXM - / - 2 Partial capture
10-14 20:21 60m -10 / -14 IT9VCE -18 / - 2 ✓ Closing observed
10-14 20:06 80m - / - DA6DNA -6 / - 4 Partial capture
10-14 19:23 80m - / - F6FEG -9 / - 4 Partial capture
10-14 18:52 60m - / -11 DJ1TU 0 / - 8 ✓ Closing fragment
10-14 18:52 60m -14 / - SP3JHZ -18 / +8 4 ✓ Closing observed
10-03 05:51 60m - / -3 DL8SBE -22 / - 2 ✓ Closing fragment
10-03 05:11 60m - / -5 SP6K -1 / - 3 ✓ Closing fragment
10-03 05:07 80m -5 / -23 DL1UDO -5 / +3 3 Partial capture
10-03 05:02 80m - / - DL1UDO 0 / - 3 Partial capture
10-03 05:02 80m - / -10 DO1OAS -1 / - 4 ✓ Closing fragment
10-03 04:58 60m -19 / - HC5F - / - 2 Partial capture
10-03 04:56 60m -18 / -13 OM3ZAS -8 / - 3 ✓ Closing observed
10-03 04:47 60m - / -16 IZ4JMA -18 / - 4 ✓ Closing fragment
09-26 19:05 60m - / -16 IK2VFR/P -8 / - 2 ✓ Closing fragment
09-26 18:58 60m - / +3 DK9PH +1 / - 6 ✓ Closing fragment
09-26 18:43 60m -13 / -5 DH5KLI 0 / - 5 ✓ Full exchange observed
09-26 17:43 60m -8 / +1 DK5IR -8 / - 2 Partial capture
09-26 17:36 60m - / - DK5IR -9 / - 3 Partial capture
09-26 17:36 60m - / -3 DL1IP -10 / - 2 Partial capture
09-23 07:44 60m - / -1 DK2CC -16 / - 2 ✓ Closing fragment
09-23 06:32 60m - / -19 OH1LA -20 / - 3 ✓ Closing fragment
09-23 06:30 60m - / -3 F4AGZ -19 / - 2 ✓ Closing fragment
09-20 20:14 60m -16 / +4 DL1RAZ -10 / - 6 ✓ Closing observed
09-12 22:40 60m -14 / - ON8FAB - / - 2 Partial capture
09-12 22:26 60m - / - DH0GSU -3 / - 4 Partial capture
09-12 22:21 60m -10 / - F5DBT - / -15 3 ✓ Closing fragment
09-12 22:11 60m -14 / - EA4QE -13 / -11 4 ✓ Closing observed
09-12 22:03 60m -12 / -9 ER1CW -11 / -15 9 ✓ Full exchange observed
09-12 21:52 60m -12 / -16 HF5A -8 / +3 5 ✓ Full exchange observed
09-12 21:46 60m -12 / -11 HB9HRR -22 / -4 5 ✓ Full exchange observed
09-12 21:31 60m -15 / -8 DK1CE -3 / -1 5 ✓ Full exchange observed
09-12 21:27 60m - / -15 SP2TQQ -16 / - 3 ✓ Closing fragment
09-12 21:25 60m -13 / +2 LB5WB 0 / - 3 ✓ Closing observed
09-12 20:58 60m -12 / -1 DL4YDR -12 / +1 5 ✓ Full exchange observed
09-12 20:58 60m -13 / -11 G8OO -10 / - 6 ✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

60m 
UTC    dB Audio  Message
211000 -17 2126  YO4BEW DF4BJ R-07
211130 -14 2126  CQ DF4BJ JO42 (x4)
211415  -7 1049  DF4BJ YO4BEW RR73
213345  -8 1074  VE1YX DF4BJ JO42 (x9)
80m 
UTC    dB Audio  Message
192515 -13  619  DF4BJ F6FEG IN96
195730 -24 2225  M9DNC DF4BJ JO42
200415  -4 1229  DF4BJ OK1AYM JO70
200645  -7 2060  DF4BJ DA6DNA JO62 (x4)
050400 -24 2011  CQ DF4BJ JO42
050415  +3 2011  DF4BJ SP1MGM JO73
050415  +7 2433  DF4BJ IQ4JO JN63
050445  +7 2011  DF4BJ SP1MGM R-21 (x3)
050815 -14 2106  DF4BJ F1PSX JN08 (x2)
40m 
UTC    dB Audio  Message
064815  -9 1376  DF4BJ UR5VPR R-24
064815  +5 1070  DF4BJ DL3MIB JN57
064845  -8 1375  DF4BJ UR5VPR R-24
064845  +3 1070  DF4BJ DL3MIB JN57 (x7)
065515 -14 1132  DF4BJ GJ0KYZ R-08
070745  -6 2217  DF4BJ F1HFP JN28 (x2)
190830 -17 2353  CQ DF4BJ JO42
201745  -7 2981  DF4BJ F4BYA JN19
20m 
UTC    dB Audio  Message
102945  -4 2429  DF4BJ F1PBZ -13
095915  +0  564  DF4BJ IU2THY JN45 (x2)
201130 -18 1130  CQ DF4BJ JO42 (x2)
10m 
UTC    dB Audio  Message
125715 -13  729  DF4BJ LZ3CB KN32 (x4)

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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