F4NJB — 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: France Most frequent locator attributed to this token: JN18

Receiver-side FT8 activity involving F4NJB, decoded by SO8OO in southeastern Poland. 425 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-22.

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 425 FT8 messages attributed to F4NJB as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (83%), followed by 40 m (17%). Most decodes (93%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

425
Messages attributed
9
UTC dates decoded
49
Active 15-min windows
-7 dB
Estimated median S/N

Bands

40m · 73 20m · 352
First attributed message: 2026-06-06
Last attributed message: 2026-09-22 18:29 UTC

Observed FT8 message patterns

Attributed sample
425 messages
Active dates
9 UTC dates
Estimated median S/N
-7 dB
Estimated 10th-90th percentile
-15 to +6 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 32, moderate (-15 to -9 dB) 145, strong (≥ -8 dB) 248.

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 F4NJB in decoded directed-looking exchanges:

Most frequent locator attributed to F4NJB

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
JN18 · 322 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,370 km (approx.)
Last such locator decoded
2026-09-22 18:29 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 UTCBandF4NJB S/NCounterpartCounterpart S/NMsgsCapture
09-22 18:26 40m -8 / -13 UA4FKT +18 / +7 5 ✓ Full exchange observed
09-22 18:23 40m -11 / -15 IZ0ZIP +7 / - 3 ✓ Closing observed
09-22 18:17 40m -10 / - RW1CW - / -1 2 ✓ Closing fragment
09-22 18:16 40m -8 / - US2YW - / - 2 ✓ Closing fragment
09-22 18:12 40m -7 / - ZL3TX - / -19 9 ✓ Closing fragment
09-22 18:06 40m -7 / -20 DM2MR +6 / -3 12 ✓ Full exchange observed
09-22 18:00 40m -8 / - DL1SP +1 / +7 2 ✓ Closing observed
09-22 17:22 40m - / +4 DH5HS +6 / - 2 ✓ Closing fragment
09-22 17:22 40m -11 / -2 DL7ARV +8 / - 5 ✓ Closing observed
09-22 17:15 40m -12 / -7 F4EGM +5 / +9 4 ✓ Full exchange observed
09-22 17:08 40m -12 / -17 YO4NT +9 / - 3 ✓ Closing observed
09-22 17:07 40m -15 / -11 RN2F -4 / -3 4 ✓ Full exchange observed
09-22 17:02 40m - / -18 RC9WC -2 / - 4 ✓ Closing fragment
09-22 17:00 40m -14 / +1 PA3BMB -2 / - 5 ✓ Full exchange observed
09-22 16:56 40m - / -17 HA7TM +17 / - 6 ✓ Closing fragment
09-22 16:55 40m - / -11 IK1MJK -4 / - 3 ✓ Closing fragment
09-22 16:54 40m - / - SV1DKR -10 / - 2 Partial capture
09-22 16:46 40m - / -5 ON7AN -1 / - 3 ✓ Closing fragment
09-22 15:52 40m - / -9 HB9HYO -13 / - 3 ✓ Closing fragment
09-22 15:31 40m - / -17 IN3ADG +1 / - 4 ✓ Closing fragment
09-22 15:25 40m - / -14 OZ5AGJ -3 / - 3 ✓ Closing fragment
09-22 15:22 40m - / - PA2KV -6 / - 2 ✓ Closing fragment
09-22 15:11 40m - / +3 DL6TNT/P -3 / - 2 ✓ Closing fragment
09-22 14:48 40m - / - UX7QV -2 / - 3 Partial capture
09-22 14:18 40m - / -16 S51DD -2 / - 2 ✓ Closing fragment
09-22 14:16 40m - / - IK2TCV -16 / - 2 Partial capture
09-22 13:44 40m - / - G3XWH -12 / - 2 ✓ Closing fragment
09-22 13:35 40m - / -18 OZ9FF +5 / - 3 ✓ Closing fragment
09-22 13:31 40m - / - HA7TM +11 / - 3 Partial capture
09-22 12:56 40m - / - HA7TM +11 / - 3 Partial capture
09-22 12:47 40m - / -2 F6EQZ -22 / - 4 ✓ Closing fragment
09-22 12:30 40m - / - DK1XAM -12 / - 3 Partial capture
09-22 12:30 40m - / - SN4K 0 / - 3 Partial capture
09-22 12:23 40m - / -13 PE1NPS -18 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
182345  +6 2769  F4NJB IZ0ZIP -15 (x2)
182430 -11 2769  IZ0ZIP F4NJB 73
182500  -8 2768  CQ F4NJB JN18 (x3)
182615 +17 2768  F4NJB UA4FKT LO23
182630  -6 2768  UA4FKT F4NJB +07
182645 +17 2768  F4NJB UA4FKT R-13
182700  -9 2768  UA4FKT F4NJB RR73
182715 +19 2768  F4NJB UA4FKT 73
182730 -13 2768  CQ F4NJB JN18 (x4)

CW

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

Explore CW reception at SO8OO

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