F4JRV — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN07

Receiver-side FT8 activity involving F4JRV, decoded by SO8OO in southeastern Poland. 45 FT8 messages attributed to this token as transmitter, on 60m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-24 and 2026-09-07.

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 45 FT8 messages attributed to F4JRV as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (100%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (89%); the estimated median was -21 dB.

Overview

45
Messages attributed
3
UTC dates decoded
9
Active 15-min windows
-21 dB
Estimated median S/N

Bands

60m · 45
First attributed message: 2026-08-24
Last attributed message: 2026-09-07 21:31 UTC

Observed FT8 message patterns

Attributed sample
45 messages
Active dates
3 UTC dates
Estimated median S/N
-21 dB
Estimated 10th-90th percentile
-24 to -15 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 40, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 0.

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 F4JRV 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 F4JRV

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
JN07 · 25 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,544 km (approx.)
Last such locator decoded
2026-09-07 21:31 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 UTCBandF4JRV S/NCounterpartCounterpart S/NMsgsCapture
09-07 21:25 60m -21 / - LA5WJA - / -19 2 ✓ Closing fragment
09-07 21:20 60m -20 / -21 LA1HW -11 / - 4 ✓ Closing observed
09-07 21:11 60m - / - DL6ZAJ 0 / - 2 ✓ Closing fragment
09-07 21:10 60m -22 / -9 DK2CC -9 / -3 5 ✓ Full exchange observed
09-07 21:06 60m -21 / - LA5WJA - / - 4 Partial capture
09-07 21:03 60m -22 / +7 IZ0MQN -12 / -5 3 ✓ Full exchange observed
09-07 20:59 60m - / -17 YO3APJ +10 / - 2 ✓ Closing fragment
09-07 20:57 60m - / -10 DL3BH -14 / - 3 ✓ Closing fragment
09-07 20:56 60m - / -14 SP9UH +1 / - 3 ✓ Closing fragment
09-07 20:54 60m - / - G0AZH -12 / - 2 ✓ Closing fragment
09-07 20:52 60m - / -15 DK3GI +2 / - 2 ✓ Closing fragment
09-07 20:49 60m - / -8 DH8BAB +3 / - 2 ✓ Closing fragment
09-07 20:49 60m - / - SP9UH +2 / - 2 Partial capture
09-07 20:49 60m - / -17 PA2A -14 / - 4 ✓ Closing fragment
09-07 20:41 60m - / -17 UN9LEI -12 / - 2 ✓ Closing fragment
08-30 23:49 60m - / -7 DL1UDO -10 / - 2 ✓ Closing fragment
08-30 21:44 60m -20 / - DG5PW - / -1 2 Partial capture
08-30 21:41 40m - / - DG5PW -8 / - 4 Partial capture
08-30 21:31 60m -20 / -21 G0AZH -2 / -10 9 ✓ Full exchange observed
08-30 21:28 60m -16 / - GH5DX - / -13 4 ✓ Closing fragment
08-30 21:20 60m -21 / +1 IW2CAK -9 / - 4 ✓ Closing observed
08-30 21:16 60m - / -14 SP5JMA +9 / - 4 ✓ Closing fragment
08-30 21:13 60m - / -9 EA1MX -16 / - 2 ✓ Closing fragment
08-30 20:59 60m - / -4 DL7MDX +3 / - 2 ✓ Closing fragment
08-30 20:56 60m - / +3 DL3RDO -6 / - 3 ✓ Closing fragment
08-30 20:56 60m -24 / - DL7MDX +6 / -2 4 Partial capture
08-24 21:12 60m - / -6 G4ZFJ +2 / - 3 ✓ Closing fragment
08-24 21:09 60m - / -13 MM6EJO -14 / - 5 Partial capture
08-24 21:02 60m -14 / -19 PH3GB -14 / -9 4 Partial capture
08-24 20:56 60m - / -5 DB5AE -10 / - 3 ✓ Closing fragment
08-24 20:56 60m - / -10 DF6WE -12 / - 3 ✓ Closing fragment
08-24 20:52 60m - / -13 OZ5AGJ -9 / - 3 ✓ Closing fragment
08-24 20:48 60m - / -16 DJ8DI -14 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

60m 
UTC    dB Audio  Message
211100 -10 1020  F4JRV DK2CC RR73
211115 -24 1923  DK2CC F4JRV 73
211130  -3 1922  F4JRV DL6ZAJ JO40
211145 -24 1923  EA5IEZ F4JRV JN07
211330  +4 2526  F4JRV DL6ZAJ 73
211345 -20 1923  CQ F4JRV JN07 (x2)
211815 -19 1923  LA1HW F4JRV JN07 (x2)
212130  -9  831  F4JRV LA1HW -21
212245 -20 1923  LA1HW F4JRV 73
212300 -13  831  F4JRV LA1HW 73
212545 -21 1924  LA5WJA F4JRV R-19 (x2)
213115 -22 1923  VE1YX F4JRV JN07
40m 
UTC    dB Audio  Message
214130  -8 2017  F4JRV DG5PW JO30 (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.

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