GB4NFN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: England Most frequent locator attributed to this token: JO02

Receiver-side FT8 activity involving GB4NFN, decoded by SO8OO in southeastern Poland. 171 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-07-27.

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 171 FT8 messages attributed to GB4NFN as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (63%), followed by 80 m (37%). In this small sample, the estimated median decoder S/N was -17 dB; no usual signal pattern is inferred.

Overview

171
Messages attributed
1
UTC dates decoded
21
Active 15-min windows
-17 dB
Estimated median S/N

Bands

80m · 64 20m · 107
First attributed message: 2026-07-27
Last attributed message: 2026-07-27 20:03 UTC

Observed FT8 message patterns

Attributed sample
171 messages
Active dates
1 UTC dates
Estimated median S/N
-17 dB
Estimated 10th-90th percentile
-24 to -7 dB
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 100, moderate (-15 to -9 dB) 50, strong (≥ -8 dB) 21.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with GB4NFN 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 GB4NFN

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
JO02 · 90 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,470 km (approx.)
Last such locator decoded
2026-07-27 20:03 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 UTCBandGB4NFN S/NCounterpartCounterpart S/NMsgsCapture
07-27 20:02 80m - / - RO2X -8 / - 4 Partial capture
07-27 20:00 80m -21 / -15 OE6TNO -10 / -9 4 ✓ Full exchange observed
07-27 19:57 80m -20 / -19 UW5KW +10 / -4 6 ✓ Full exchange observed
07-27 19:57 80m -17 / -9 HB3YOY -12 / -2 6 ✓ Full exchange observed
07-27 19:52 80m -22 / -12 SP9UPH +17 / +9 4 ✓ Full exchange observed
07-27 19:49 80m - / -4 DL5JMN +2 / - 5 ✓ Closing fragment
07-27 19:49 80m -17 / -16 R2FCT +2 / -2 5 ✓ Full exchange observed
07-27 19:47 80m -17 / -20 RA4FW -6 / - 4 ✓ Closing observed
07-27 19:45 80m -16 / -9 DO1MDO -8 / 0 4 ✓ Full exchange observed
07-27 19:45 80m - / - SP9UPH +13 / - 10 Partial capture
07-27 19:43 80m -24 / -3 PA0EBG -24 / -3 3 ✓ Full exchange observed
07-27 19:41 80m -24 / -7 ON7KEI -18 / - 5 ✓ Closing observed
07-27 19:40 80m -22 / -11 IZ0RPS +4 / +10 4 ✓ Full exchange observed
07-27 19:39 80m - / -11 HA7TM +10 / - 4 ✓ Closing fragment
07-27 19:38 80m -24 / - ON4CHJ - / - 2 Partial capture
07-27 19:36 80m -22 / -19 OK1FK +6 / -8 5 ✓ Full exchange observed
07-27 19:33 80m -17 / - DO5HOK +2 / +9 6 ✓ Closing observed
07-27 19:30 80m -14 / -4 F4JTM +2 / - 5 ✓ Full exchange observed
07-27 19:27 80m -19 / - HA1UA - / - 6 Partial capture
07-27 19:24 80m -20 / - <...> - / - 3 Partial capture
07-27 19:14 80m -19 / - DO1DMR - / +9 10 Partial capture
07-27 19:10 80m - / -19 OE1TKS -1 / - 3 ✓ Closing fragment
07-27 19:00 80m -22 / +10 DD125RFD -13 / -9 2 Partial capture
07-27 19:00 80m - / - HG8LXL +5 / - 2 Partial capture
07-27 18:58 80m -19 / -24 DO9AO +13 / - 4 ✓ Closing observed
07-27 18:51 80m - / +1 SP3GAX +6 / - 5 ✓ Closing fragment
07-27 18:49 80m - / +6 DK9MLA -10 / - 3 ✓ Closing fragment
07-27 18:35 20m -24 / - OH2FQV - / -15 2 ✓ Closing fragment
07-27 18:25 20m -19 / - DG5LP - / +10 3 ✓ Closing fragment
07-27 18:09 20m -14 / - DL6UM - / -9 2 ✓ Closing fragment
07-27 18:03 20m 0 / - YO4NF - / -4 2 ✓ Closing fragment
07-27 18:02 20m -3 / - SP7IIT - / +5 2 ✓ Closing fragment
07-27 17:37 20m -12 / -20 R4HEA -19 / -14 5 Partial capture
07-27 17:31 20m -16 / - UR4QWW - / -9 2 ✓ Closing fragment
07-27 17:16 20m - / -15 R4IK -2 / - 2 ✓ Closing fragment
07-27 17:04 20m - / -14 HB9GUX -14 / - 3 Partial capture
07-27 16:39 20m - / -12 F4FSY -16 / - 2 Partial capture
07-27 16:34 20m - / - DL2MEL -12 / - 2 ✓ Closing fragment
07-27 15:13 40m - / -23 SP3IPA -10 / - 3 ✓ Closing fragment
07-27 14:46 40m - / -8 DG0RB -9 / - 3 ✓ Closing fragment
07-27 14:32 40m - / -17 US1MM -15 / - 10 ✓ Closing fragment
07-27 14:26 40m - / - US1MM -22 / - 3 Partial capture
07-27 14:20 40m - / - US1MM -18 / - 6 Partial capture
07-27 13:07 20m -11 / -5 F5IXN -10 / - 4 ✓ Closing observed
07-27 13:04 20m - / - RA6AVP -16 / - 2 Partial capture
07-27 12:20 20m -12 / - RW1AX - / -14 4 ✓ Closing fragment
07-27 12:17 20m -12 / -18 UA7T -13 / - 4 ✓ Closing observed
07-27 12:11 20m - / - DL1R -3 / - 7 Partial capture
07-27 10:43 20m - / - RN6MA -4 / - 2 ✓ Closing fragment
07-27 10:39 20m - / -15 RN6MA -4 / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
195845  +9 1546  GB4NFN UW5KW KO30
195900 -18 1546  UW5KW GB4NFN -04
195915  +8 1547  GB4NFN UW5KW R-19
195930 -21 1546  UW5KW GB4NFN RR73
195945  +8 1546  GB4NFN UW5KW 73
200000 -17 1546  CQ GB4NFN JO02
200015  -4 1547  GB4NFN OE6TNO JN77
200030 -21 1546  OE6TNO GB4NFN -09
200045 -13 1546  GB4NFN OE6TNO R-15 (x2)
200245 -11 2446  GB4NFN RO2X KO74 (x2)
200330 -24 1547  CQ GB4NFN JO02
200415  -9 2228  GB4NFN RO2X KO74 (x2)
20m 
UTC    dB Audio  Message
181045 -24 1608  CQ GB4NFN JO02 (x2)
181145 -24 1608  UR5LY GB4NFN R-14
181730  -4 1125  GB4NFN CS8ABF RR73
182315 -24 1608  DL7GAL GB4NFN -05
182545 -17 1608  DG5LP GB4NFN +10 (x3)
182715 -20 1608  CQ GB4NFN JO02 (x2)
182815 -20 1608  9A6CC GB4NFN +07
183415 -24 1608  CQ GB4NFN JO02
183545 -24 1608  OH2FQV GB4NFN -15 (x2)
183715 -24 1608  CQ GB4NFN JO02
40m 
UTC    dB Audio  Message
143330 -22 1570  GB4NFN US1MM KO30 (x8)
144600 -12 2225  GB4NFN DG0RB JO60 (x3)
150130 -15 1178  GB4NFN DM3XD RR73
151300  -8 1012  GB4NFN SP3IPA JO82 (x3)

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