F4JRM — 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: IN97

Receiver-side FT8 activity involving F4JRM, decoded by SO8OO in southeastern Poland. 71 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-07 and 2026-08-09.

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 71 FT8 messages attributed to F4JRM as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (96%), followed by 40 m (4%). Most decodes (100%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

71
Messages attributed
3
UTC dates decoded
14
Active 15-min windows
-9 dB
Estimated median S/N

Bands

40m · 3 20m · 68
First attributed message: 2026-08-07
Last attributed message: 2026-08-09 20:18 UTC

Observed FT8 message patterns

Attributed sample
71 messages
Active dates
3 UTC dates
Estimated median S/N
-9 dB
Estimated 10th-90th percentile
-18 to -2 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 24, strong (≥ -8 dB) 32.

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 F4JRM 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 F4JRM

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
IN97 · 33 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,687 km (approx.)
Last such locator decoded
2026-08-09 19:50 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 UTCBandF4JRM S/NCounterpartCounterpart S/NMsgsCapture
08-09 20:09 40m - / -1 SP2GJI -13 / - 2 ✓ Closing fragment
08-09 20:02 40m - / -7 4X5JK -19 / - 2 ✓ Closing fragment
08-09 19:52 40m - / +6 PD0IFI -7 / - 3 ✓ Closing fragment
08-08 20:44 20m - / -6 F1ODM -14 / - 2 Partial capture
08-08 20:16 20m - / - 9A4ZM -11 / - 2 Partial capture
08-08 20:12 20m -13 / - K9STL - / - 2 Partial capture
08-08 20:09 20m -13 / -12 EA8AT -8 / -4 4 ✓ Full exchange observed
08-08 19:54 20m -22 / - PD1HPB - / -15 2 Partial capture
08-08 19:48 20m - / - F5RRS +1 / - 5 Partial capture
08-08 19:36 20m -16 / - VO1IV - / -15 5 ✓ Closing fragment
08-07 20:37 20m -9 / - PY2SAO - / -12 5 Partial capture
08-07 20:34 20m -7 / - CO8LY - / - 2 Partial capture
08-07 20:22 20m -3 / - VA7ON - / - 2 Partial capture
08-07 20:20 20m -1 / -10 HS0ZOY -8 / 0 3 ✓ Full exchange observed
08-07 19:41 40m - / - EI8GS -10 / - 2 ✓ Closing fragment
08-07 17:08 20m -2 / - JA5NSR - / -20 2 Partial capture
08-07 17:04 20m -4 / - JO1LVZ - / - 2 Partial capture
08-07 16:54 20m -10 / - JT1BZ - / - 2 Partial capture
08-07 16:46 20m -13 / - BG7BMG - / -19 4 ✓ Closing fragment
08-07 16:43 20m 0 / -9 UN7LEW -2 / - 3 ✓ Closing observed
08-07 16:33 20m -14 / - 8S7DL - / -9 4 Partial capture
08-07 16:31 20m -6 / - MM8FKF - / -18 3 ✓ Closing fragment
08-07 16:27 20m -12 / -11 EA5IXH -18 / -13 3 Partial capture
08-07 16:26 20m -8 / - 3A2MW - / -18 2 ✓ Closing fragment
08-07 16:20 20m -1 / - DK8HC - / -7 2 Partial capture
08-07 16:17 20m -1 / +3 4L7T -9 / -15 5 ✓ Full exchange observed
08-07 16:08 20m -3 / - JY5JA - / - 2 Partial capture
08-07 15:56 20m -13 / - HI8UD - / -17 3 Partial capture
08-07 15:54 20m -12 / - 7Z1CZ - / - 2 Partial capture
08-07 15:51 20m -9 / -20 TA2ANK -8 / -18 4 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
194115  -7 2435  F4JRM EI8GS +11 (x2)
195030 -19 1247  CU3EM F4JRM R-09
200045  -7  389  F4JRM <...> -08
194200  -3  485  F4JRM ON6SAT +02
194500 -24 1753  F4JRM TF4M +03
195015 -17 2360  VK6BAD F4JRM IN97
195200  -6  464  F4JRM PD0IFI JO32 (x3)
200215 -17 2092  F4JRM 4X5JK -07 (x2)
200945 -15 1717  F4JRM SP2GJI -01 (x2)
201845 -21 1317  9A170TESLA F4JRM R-10
20m 
UTC    dB Audio  Message
195400 -24 1956  PD1HPB F4JRM -15 (x2)
195545  -4  703  VE9GC F4JRM IN97
200915  -7  748  F4JRM EA8AT -12
200930 -14  748  EA8AT F4JRM R-04
200945 -10  747  F4JRM EA8AT RR73
201000 -12  747  EA8AT F4JRM 73
201230 -16 2066  K9STL F4JRM IN97 (x2)
201630 -15 2336  F4JRM 9A4ZM JN86 (x2)
202315  -8  527  F4JRM LU3DLY -18
204415 -15 2374  F4JRM F1ODM -06 (x2)
094615 -18 2024  F4JRM PE9JAN JO22

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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