EA3RKM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Spain Most frequent locator attributed to this token: JN11

Receiver-side FT8 activity involving EA3RKM, decoded by SO8OO in southeastern Poland. 66 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 19 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-20.

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 66 FT8 messages attributed to EA3RKM as the transmitting token by decoded message structure across 19 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (77%), followed by 20 m (23%). Most decodes (91%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

66
Messages attributed
19
UTC dates decoded
29
Active 15-min windows
-9 dB
Estimated median S/N

Bands

40m · 51 20m · 15
First attributed message: 2026-06-08
Last attributed message: 2026-09-20 20:28 UTC

Observed FT8 message patterns

Attributed sample
66 messages
Active dates
19 UTC dates
Estimated median S/N
-9 dB
Estimated 10th-90th percentile
-17 to +3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 24, strong (≥ -8 dB) 31.

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 EA3RKM 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 EA3RKM

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
JN11 · 32 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,727 km (approx.)
Last such locator decoded
2026-09-20 20:27 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 UTCBandEA3RKM S/NCounterpartCounterpart S/NMsgsCapture
09-20 20:27 40m -10 / - PH82LIB - / -25 2 Partial capture
09-12 19:30 40m -7 / +10 EH3ST -4 / -5 3 ✓ Full exchange observed
09-12 08:31 40m - / - IK2ZJR -6 / - 10 Partial capture
09-11 20:39 40m +3 / - II9IAGM - / -17 5 Partial capture
09-08 07:44 40m - / - F5MXH -12 / - 2 Partial capture
09-05 21:51 40m -14 / - SQ100PKP - / -13 2 Partial capture
09-03 21:05 40m - / - RN6HK +8 / - 2 Partial capture
09-03 21:04 40m -13 / -2 EG7CQ -14 / - 3 ✓ Closing observed
09-01 19:47 40m - / - DL3MIB +14 / - 7 Partial capture
09-01 17:48 40m -17 / - <...> - / -1 2 Partial capture
08-29 22:53 40m -2 / -15 K2ZJ +1 / - 5 ✓ Closing observed
08-29 22:37 40m -5 / -6 LZ6C -6 / -22 12 ✓ Full exchange observed
08-26 23:18 40m -14 / - AA1SU - / -15 3 Partial capture
08-24 20:44 40m - / -8 UW5IM +13 / - 24 Partial capture
08-18 19:48 40m - / -16 SN1A -16 / - 3 ✓ Closing fragment
08-13 22:52 20m - / -16 VE3ARF -5 / - 2 ✓ Closing fragment
08-13 21:52 20m - / -10 NV1U -16 / - 2 ✓ Closing fragment
08-10 22:08 20m - / -15 YO4NF -4 / - 2 Partial capture
08-08 23:25 40m -20 / - EH1SGG - / -11 3 ✓ Closing fragment
08-08 22:23 40m -12 / -2 GB64MOD -5 / - 2 Partial capture
07-25 18:24 40m - / - DL3JHK -11 / - 4 Partial capture
07-19 18:51 40m - / -10 <...> -20 / - 4 Partial capture
07-14 20:37 40m - / -15 ED7SUN -6 / - 2 ✓ Closing fragment
07-07 20:42 40m - / -1 EG5HSV -4 / - 2 ✓ Closing fragment
07-05 19:51 20m +5 / 0 CR2WWA -14 / -4 7 ✓ Full exchange observed
07-04 21:11 20m - / - F4HSB -23 / - 3 Partial capture
06-30 19:25 40m - / -8 II2WWA -14 / - 2 ✓ Closing fragment
06-26 18:49 40m - / -8 IQ7KM -15 / - 2 ✓ Closing fragment
06-24 20:33 40m - / -7 IQ3GO -16 / - 2 ✓ Closing fragment
06-24 20:14 40m -10 / - <...> - / - 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
083230  -6 2564  EA3RKM IK2ZJR JN45 (x8)
162345 -16  956  II0CDS EA3RKM 73
171830  -5 1605  EA3RKM II6IALU -05
193030  -6 2145  EA3RKM EH3ST +10
193045  -7 2467  EH3ST EA3RKM R-05
193100  -1 2145  EA3RKM EH3ST RR73
202730 -10  799  PH82LIB EA3RKM JN11 (x2)
20m 
UTC    dB Audio  Message
195215  +5 2598  CR2WWA EA3RKM JN11 (x2)
195300 -15 1627  EA3RKM CR2WWA +00
195315  +7 2598  CR2WWA EA3RKM R-04
195330 -14 1627  EA3RKM CR2WWA RR73
195345  +8 2598  CR2WWA EA3RKM 73
220845  -3 1950  EA3RKM YO4NF -15 (x2)
211930 -17  267  EA3RKM K2TQC RR73
213630 -12  945  EA3RKM CN8NS -15
213700 -14  945  EA3RKM RR73; M0VCP <...> -14
215230 -18 1331  EA3RKM NV1U -10 (x2)
225245  -7  444  EA3RKM VE3ARF -16 (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.

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