IU7SEB — 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: Italy Most frequent locator attributed to this token: JM99

Receiver-side FT8 activity involving IU7SEB, decoded by SO8OO in southeastern Poland. 102 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 19 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-26.

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 102 FT8 messages attributed to IU7SEB as the transmitting token by decoded message structure across 19 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (78%), followed by 10 m (21%) and 40 m (1%). Several six-hour UTC windows tied for the largest share (71%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

102

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

40m · 1 20m · 80 10m · 21

First attributed message: 2026-06-07
Last attributed message: 2026-09-26 14:38 UTC

Observed FT8 message patterns

Attributed sample: 102 messages
Active dates: 19 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -19 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 29, moderate (-15 to -9 dB) 39, strong (≥ -8 dB) 34.

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 IU7SEB in decoded directed-looking exchanges:

CR7BTF · Portugal F8VNU · France 3A2MW · Monaco BA3QIQ · China BA5AW · China DB1EF · Fed. Rep. of Germany G4UJS · England SV1AVT · Greece UT7UJ · Ukraine 4X5CG · Israel F5RRS · France UA9FMT · European Russia

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 IU7SEB

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: JM99 · 66 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,181 km (approx.)
Last such locator decoded: 2026-08-30 16:12 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	IU7SEB S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-20 11:53	10m	- / -	CR7BUW	-10 / -	2	Partial capture
10-04 01:46	40m	- / -21	MM8FKF	-9 / -	2	Partial capture
08-30 16:10	20m	-2 / +5	DB1EF	-16 / +5	5	✓ Full exchange observed
08-30 09:03	20m	-2 / -	Z62NS	- / -	2	Partial capture
08-30 09:02	20m	-4 / -	ON4KEB	-16 / -5	3	Partial capture
08-30 08:59	20m	- / -24	IK4LZH	+18 / -	4	Partial capture
08-30 08:59	20m	-1 / -6	UT7UJ	-1 / +5	4	✓ Full exchange observed
08-28 16:24	20m	- / -9	F4JLS	-4 / -	2	Partial capture
08-28 16:22	20m	- / -	G7RCQ	+1 / -	5	Partial capture
08-28 16:19	20m	- / -	M9LHX	-8 / -	6	Partial capture
08-28 16:19	20m	- / -	R8LCA	-14 / -	4	Partial capture
08-28 16:18	20m	- / -	M7MOK	+1 / -	3	Partial capture
08-27 15:36	20m	- / -3	G4UJS	-6 / -	2	✓ Closing fragment
08-16 09:13	20m	-13 / -	SV1AVT	- / -	2	✓ Closing fragment
07-31 17:03	20m	-8 / -	BA3QIQ	- / -14	2	✓ Closing fragment
07-30 18:38	40m	- / -18	F5RRS	-17 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
145845 -11 1263  CQ IU7SEB JM99
165700 -15 1263  DC9JVN IU7SEB -13
165800 -13 1263  CQ IU7SEB JM99
165830 -14 1264  DL3NGN IU7SEB -02
170100 -20 1264  OE5YCP IU7SEB +03
170230 -19 1264  F8VNU IU7SEB RR73
162045  -8  505  CQ IU7SEB JM99 (x2)
152045 -23 1406  IU7SEB CR7BTF RR73
115300  -8 2495  IU7SEB CR7BUW IM58 (x2)

40m

UTC    dB Audio  Message
183815 -10  696  IU7SEB UA9FMT RR73
183845 -17 1967  IU7SEB F5RRS JN36 (x3)
143815 -18 1201  9A60CBM IU7SEB R+17
014615  +1 2316  IU7SEB EA3AKY JN01
014645 -11  998  IU7SEB MM8FKF -21 (x2)
014815 -17  237  IU7SEB 4L7T +13
020415 -10  296  IU7SEB 4X5CG 73
021015  +1 2316  IU7SEB EA3AKY JN01

80m

UTC    dB Audio  Message
020715  +6 1018  IU7SEB TF3VS HP94

20m

UTC    dB Audio  Message
090230 -16  913  IU7SEB ON4KEB JO20
090245  -4  912  ON4KEB IU7SEB -05 (x2)
090345  -7  912  Z62NS IU7SEB JM99 (x2)
160930  -6 1242  CQ IU7SEB JM99                        a1 (x2)
161015 -18 1564  IU7SEB DB1EF JO41
161030  +0 1242  DB1EF IU7SEB +05
161045 -16 1564  IU7SEB DB1EF R+05
161100  -5 1242  DB1EF IU7SEB RR73
161115 -14 1564  IU7SEB DB1EF 73
161130  -1 1242  CQ IU7SEB JM99 (x2)
161300  +1 1242  SQ5WBW/P IU7SEB -21

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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