TF5B — 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: Iceland Most frequent locator attributed to this token: IP05

Receiver-side FT8 activity involving TF5B, decoded by SO8OO in southeastern Poland. 2,122 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 61 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-23.

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 2,122 FT8 messages attributed to TF5B as the transmitting token by decoded message structure across 61 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (81%), followed by 40 m (15%) and 10 m (4%). Most decodes (98%) fell within the six-hour window 06:00-12:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -17 dB.

Overview

2,122
Messages attributed
61
UTC dates decoded
309
Active 15-min windows
-17 dB
Estimated median S/N

Bands

40m · 322 20m · 1,721 10m · 79
First attributed message: 2026-06-07
Last attributed message: 2026-10-23 07:54 UTC

Observed FT8 message patterns

Attributed sample
2,122 messages
Active dates
61 UTC dates
Estimated median S/N
-17 dB
Estimated 10th-90th percentile
-24 to -4.3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,154, moderate (-15 to -9 dB) 532, strong (≥ -8 dB) 436.

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 TF5B 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 TF5B

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
IP05 · 1,243 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
2,895 km (approx.)
Last such locator decoded
2026-10-23 07:54 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 UTCBandTF5B S/NCounterpartCounterpart S/NMsgsCapture
10-23 08:49 40m - / - DG7JG -9 / - 4 Partial capture
10-23 08:24 40m - / - DG3AWF -17 / - 3 Partial capture
10-23 08:21 40m - / - DL3ND -5 / - 15 Partial capture
10-23 08:10 40m - / - DJ2MS -16 / - 2 Partial capture
10-23 08:10 40m - / -12 IK1MJK -20 / - 2 Partial capture
10-23 08:08 40m - / - DL1RMY -18 / - 3 Partial capture
10-23 08:07 40m - / - DJ2MS -16 / - 2 Partial capture
10-23 08:06 40m - / -4 OK2CNI +3 / - 3 ✓ Closing fragment
10-23 07:58 40m - / -8 YO4FZV -9 / - 34 ✓ Closing fragment
10-23 07:53 40m - / -15 SQ9LDE +6 / - 2 ✓ Closing fragment
10-23 07:53 40m - / - YO2UKG +4 / - 4 Partial capture
10-23 07:45 40m -22 / - OK1BID -14 / -8 4 ✓ Full exchange observed
10-23 07:44 40m - / - DG3HAN -16 / - 2 Partial capture
10-23 07:33 40m - / - F4NJT -21 / - 3 Partial capture
10-23 07:29 40m -24 / -13 F5LPL -19 / - 3 ✓ Closing observed
10-23 07:26 40m - / -10 OM2ZZ +16 / - 4 ✓ Closing fragment
10-23 07:20 40m - / -16 HA4UC -7 / - 5 ✓ Closing fragment
10-23 07:16 40m - / - PA5PR +3 / - 2 ✓ Closing fragment
10-23 07:14 40m - / -14 YO9IBC -3 / - 3 ✓ Closing fragment
10-23 06:55 40m - / +10 SP9SC -10 / - 3 ✓ Closing fragment
10-23 06:54 40m - / - IW2NEF -11 / - 2 Partial capture
10-23 06:44 40m - / - IW2NEF -8 / - 2 Partial capture
10-21 09:19 40m - / - DM2PE -12 / - 2 Partial capture
10-21 09:17 40m - / - SP9DPI -17 / - 5 ✓ Closing fragment
10-21 09:07 40m - / -10 I4VOL -15 / - 3 ✓ Closing fragment
10-21 08:52 40m - / - DH3TK -6 / - 5 Partial capture
10-21 08:40 40m - / - YU7BW -6 / - 4 Partial capture
10-21 08:25 40m - / - DB1RLP -1 / - 3 Partial capture
10-21 08:10 40m - / -6 SP7JMJ -15 / - 3 ✓ Closing fragment
10-21 08:08 40m - / -11 YT2TW -4 / - 2 ✓ Closing fragment
10-21 07:55 40m - / -10 DF1IH 0 / - 5 ✓ Closing fragment
10-21 07:49 40m -24 / -8 RY3K -15 / -19 7 ✓ Full exchange observed
10-21 07:36 40m - / -16 ON6YH -6 / - 3 ✓ Closing fragment
10-20 13:06 10m -21 / - RA4NCX - / -22 4 ✓ Closing fragment
10-20 12:55 10m - / -21 TF4M -9 / - 4 Partial capture
10-20 11:27 10m -20 / - UT8SQ - / -8 2 ✓ Closing fragment
10-20 11:23 10m -22 / - SQ2MMX - / - 2 ✓ Closing fragment
10-20 11:17 10m -22 / - UR7HNR - / -18 2 ✓ Closing fragment
10-20 11:14 10m -12 / - E70SZ - / -13 2 ✓ Closing fragment
10-20 11:12 10m -18 / - R3PLN - / -17 2 ✓ Closing fragment
10-20 11:09 10m -15 / 0 CR7BUW -10 / -17 6 ✓ Full exchange observed
10-20 11:08 10m -13 / - EA5GRU - / -11 2 ✓ Closing fragment
10-20 11:03 10m -18 / - LY1DY - / -20 2 ✓ Closing fragment
10-20 11:02 10m -19 / - IK1SOW - / - 2 ✓ Closing fragment
10-20 11:00 10m -19 / - EU1KI - / +7 2 Partial capture
10-20 10:50 10m -20 / - OK7BB - / +5 2 ✓ Closing fragment
10-20 10:47 10m -22 / - EA5BCO - / -8 2 ✓ Closing fragment
10-20 10:45 10m -22 / - EB3DKE - / -9 2 ✓ Closing fragment
10-20 10:44 10m -22 / - UR4UAK - / -24 2 ✓ Closing fragment
10-20 10:38 10m -23 / - EA3ZR - / -2 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
082500  -1  356  TF5B DL3ND JN57
082500 -19 2164  TF5B DG3AWF JO50
082530 -16 1698  TF5B DL3ND JN57 (x2)
082600 -19 2164  TF5B DG3AWF JO50
082630 -15 1698  TF5B DL3ND JN57 (x4)
083000 -19 2164  TF5B DG3AWF JO50
083300 -19 1645  TF5B F4FVW JN29
084930  -9 1092  TF5B DG7JG JO31 (x4)
10m 
UTC    dB Audio  Message
112945 -19 1626  RC9WC TF5B R-25
125500 -10 2560  TF5B TF4M HP85 (x4)
130315 -24 1882  CQ TF5B IP05 (x2)
130445 -24 1882  <...> TF5B -06
130545 -19 1882  CQ TF5B IP05
130615 -20 1882  RA4NCX TF5B R-22 (x4)
130845 -24 1882  RA3QM TF5B +05
130945 -24 1882  CQ TF5B IP05
20m 
UTC    dB Audio  Message
084415  -1 1902  TF5B G5TAO IO92 (x2)
084715  -9 1531  TF5B PA1APW JO22 (x2)
084800  -6 1902  UT7EM TF5B -11
084815  -5 1544  TF5B PA1APW JO22
084830 -11 1902  UT7EM TF5B -11
084845  -7 1544  TF5B PA1APW JO22
085000 -16 1902  UT7EM TF5B -11
085100 -15 1902  CQ TF5B IP05
085215 -23 1896  TF5B YO/OE9RRI -09 (x3)
085500  -9 1902  CQ TF5B IP05 (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.

CW

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

Explore CW reception at SO8OO

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