EA5JMM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Spain Most frequent locator attributed to this token: IM99

Receiver-side FT8 activity involving EA5JMM, decoded by SO8OO in southeastern Poland. 7 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-20 and 2026-07-15.

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 7 FT8 messages attributed to EA5JMM as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (71%), followed by 20 m (29%). In this small sample, the estimated median decoder S/N was -22 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-22 dB

Estimated median S/N

Bands

20m · 2 10m · 5

First attributed message: 2026-06-20
Last attributed message: 2026-07-15 11:49 UTC

Observed FT8 message patterns

Attributed sample: 7 messages
Active dates: 2 UTC dates
Estimated median S/N: -22 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 0, 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. 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 EA5JMM in decoded directed-looking exchanges:

DG2SAT · Fed. Rep. of Germany ON7DE · Belgium F5PBG · France OE3DXA · Austria SP5ROM · Poland

Most frequent locator attributed to EA5JMM

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: IM99 · 3 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,129 km (approx.)
Last such locator decoded: 2026-06-20 10:33 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 UTC	Band	EA5JMM S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 18:53	40m	- / -	DK1MBY	-11 / -	6	Partial capture
08-12 12:40	10m	- / +9	ON7DE	-19 / -	3	✓ Closing fragment
08-12 12:30	10m	- / +1	DG2SAT	-2 / -	3	✓ Closing fragment
08-11 17:22	40m	- / -14	OE3DXA	-2 / -	2	✓ Closing fragment
08-10 10:39	20m	- / 0	IK4LZH	+7 / -	5	Partial capture
08-10 10:35	20m	- / -9	F5PBG	-21 / -	3	✓ Closing fragment
07-27 12:03	20m	- / +2	LA1SDX	-13 / -	2	Partial capture
07-15 11:43	20m	- / -	F5IXN	-19 / -	2	Partial capture
07-11 19:41	80m	- / -	E70SZ	+4 / -	2	Partial capture
07-11 19:35	80m	- / -20	SV9MBH	-9 / -	4	Partial capture
07-11 19:17	40m	- / -16	R3XBS	-14 / -	2	Partial capture
07-11 19:15	40m	- / -14	RN6MA	-11 / -	3	Partial capture
07-11 19:11	40m	- / -11	SP5ROM	-16 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
191100 -17 1292  EA5JMM SP5ROM -11 (x2)
191530 -10 1291  EA5JMM RN6MA -14 (x3)
191730 -15 1173  EA5JMM R3XBS -16 (x2)
172200  +1 1169  EA5JMM OE3DXA -14 (x2)
185315 -13  981  EA5JMM DK1MBY JN58 (x6)

10m

UTC    dB Audio  Message
123015  -3 1144  EA5JMM DG2SAT JN48 (x3)
123645  -9 1144  EA5JMM DL1AG R-08
124045 -17 1826  EA5JMM ON7DE JO20 (x3)

20m

UTC    dB Audio  Message
114345 -16 1427  EA5JMM F5IXN JN23 (x2)
114530 -23 1428  CR7BRV EA5JMM R-10
114930 -17 1427  9A5JU EA5JMM R-18
120345 -14 2535  EA5JMM LA1SDX +02 (x2)
103545 -21 1498  EA5JMM F5PBG IN78 (x3)
103915  +4  462  EA5JMM IK4LZH JN54 (x5)

80m

UTC    dB Audio  Message
193530 -10 1432  EA5JMM SV9MBH KM25 (x4)
194100  +9 1277  EA5JMM E70SZ JN84 (x2)

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