IU4GBM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN54

Receiver-side FT8 activity involving IU4GBM, decoded by SO8OO in southeastern Poland. 13 FT8 messages attributed to this token as transmitter, on 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-08-30 and 2026-09-16.

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 13 FT8 messages attributed to IU4GBM as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -13 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

40m · 13

First attributed message: 2026-08-30
Last attributed message: 2026-09-16 20:23 UTC

Observed FT8 message patterns

Attributed sample: 13 messages
Active dates: 4 UTC dates
Estimated median S/N: -13 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 6, strong (≥ -8 dB) 1.

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 IU4GBM in decoded directed-looking exchanges:

EA1EMO · Spain 9A4ZM · Croatia DK7ZT · Fed. Rep. of Germany GJ0KYZ · Jersey IK4RVY · Italy OK1DLA · Czech Republic DL5DQZ · Fed. Rep. of Germany HA7TM · Hungary IK4CBO · Italy IU3MAG · Italy ON7GB · Belgium SP9UPH · Poland

Most frequent locator attributed to IU4GBM

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: JN54 · 6 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,013 km (approx.)
Last such locator decoded: 2026-09-16 20:23 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	IU4GBM S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 20:21	40m	-24 / -14	DK7ZT	0 / -	4	✓ Closing observed
09-16 20:20	40m	-16 / +3	GJ0KYZ	-8 / +4	3	✓ Full exchange observed
09-15 18:58	60m	- / -12	DK7ZT	-15 / -	4	Partial capture
09-15 18:58	60m	- / -8	HA7TM	+5 / -	4	✓ Closing fragment
09-15 18:58	60m	- / -17	ON7GB	-3 / -	12	✓ Closing fragment
09-04 16:05	40m	- / -18	IK4RVY	-6 / -	2	✓ Closing fragment
09-03 19:18	60m	- / -	US2YW	+8 / -	4	Partial capture
08-30 20:05	40m	- / -21	F1PBZ	+5 / -	2	Partial capture
08-30 19:58	60m	- / -	DD6ZV	-5 / -	8	Partial capture
08-30 19:58	60m	- / -17	DK7UY	-6 / -	2	Partial capture
08-30 19:56	60m	- / -18	DL5DQZ	0 / -	3	✓ Closing fragment
08-30 19:55	60m	- / -3	IK4CBO	-10 / -	3	✓ Closing fragment
08-30 19:30	40m	- / -19	OK1DLA	+8 / -	6	✓ Closing fragment
08-30 18:29	40m	-9 / -12	DL1EDR	+7 / -7	7	Partial capture
08-30 18:27	40m	-12 / -2	9A4ZM	+10 / -3	5	✓ Full exchange observed
08-30 18:11	60m	- / -19	SP9UPH	+3 / -	3	✓ Closing fragment
08-30 18:07	60m	- / -7	IU3MAG	-3 / -	5	✓ Closing fragment
08-30 18:07	60m	- / -23	SQ9LOJ	-4 / -	2	✓ Closing fragment
08-30 10:08	40m	- / -	F1FCA	-17 / -	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
200600  +5 2788  IU4GBM F1PBZ -21
160500  -8 1981  IU4GBM IK4RVY -18 (x2)
161715 -17  971  SP9TEX IU4GBM JN54
200545 -23 1459  CQ DX IU4GBM JN54
200630 -17 1460  IU4GBM IN3LHF -24
202015  -8 1273  IU4GBM GJ0KYZ +03
202030 -16 1273  GJ0KYZ IU4GBM R+04
202045  -7 1273  IU4GBM GJ0KYZ RR73
202115  -5 1907  IU4GBM DK7ZT -14
202130 -19 1273  CQ DX IU4GBM JN54
202145  +1 1907  IU4GBM DK7ZT -14 (x2)
202230 -24 1273  DK7ZT IU4GBM 73
202300 -18 1274  CQ DX IU4GBM JN54

60m

UTC    dB Audio  Message
185845 -15 1901  IU4GBM DK7ZT -12
185915  -6 1627  IU4GBM ON7GB JO21
185915  +5 1394  IU4GBM HA7TM 73
185915 -13 1901  IU4GBM DK7ZT -12
185945  -3 1627  IU4GBM ON7GB JO21
185945  +6 1394  IU4GBM HA7TM 73
185945 -13 1901  IU4GBM DK7ZT -12
190015  -4 1627  IU4GBM ON7GB JO21 (x8)

20m

UTC    dB Audio  Message
153415  -1  565  IU4GBM EA1EMO RR73

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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