IU5TUD — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN53

Receiver-side FT8 activity involving IU5TUD, decoded by SO8OO in southeastern Poland. 498 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 32 UTC dates in the available aggregate history. Observed between 2026-06-09 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 498 FT8 messages attributed to IU5TUD as the transmitting token by decoded message structure across 32 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (49%), followed by 80 m (41%) and 40 m (9%). Most decodes (93%) fell within the six-hour window 20:00-02:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

498

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

160m · 244 80m · 205 40m · 47 20m · 2

First attributed message: 2026-06-09
Last attributed message: 2026-09-20 00:47 UTC

Observed FT8 message patterns

Attributed sample: 498 messages
Active dates: 32 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -19 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 140, moderate (-15 to -9 dB) 187, strong (≥ -8 dB) 171.

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 IU5TUD in decoded directed-looking exchanges:

F5RRS · France ×2 OM2WQ · Slovak Republic ×2 S52F · Slovenia ×2 SQ9PBV · Poland ×2 4O7CC · Montenegro 9A2AJ · Croatia 9A5E · Croatia CT2GQA · Portugal DF3JO · Fed. Rep. of Germany DF4FS · Fed. Rep. of Germany DH2YBG · Fed. Rep. of Germany DK7ZT · Fed. Rep. of Germany

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 IU5TUD

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: JN53 · 70 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,089 km (approx.)
Last such locator decoded: 2026-09-20 00:11 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	IU5TUD S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 00:46	40m	0 / -	HI8J	- / -5	4	Partial capture
09-20 00:45	40m	+2 / -	US8KA	- / +7	2	✓ Closing fragment
09-20 00:44	40m	-2 / -	PD2ET	- / +4	2	Partial capture
09-20 00:39	40m	-1 / -	JY5IB	-14 / -6	3	✓ Closing observed
09-20 00:36	40m	+6 / -	RN2F	- / -4	2	✓ Closing fragment
09-20 00:33	80m	-4 / -10	YO3WST	-8 / -15	4	✓ Full exchange observed
09-20 00:29	80m	-4 / -13	GM6URC	-4 / -14	6	✓ Full exchange observed
09-20 00:28	80m	-8 / -3	DH1KJ	+6 / +6	4	✓ Full exchange observed
09-20 00:27	80m	-8 / -6	ON4MAP	-7 / -9	4	✓ Full exchange observed
09-20 00:26	80m	- / -4	I8OHQ	+7 / -	2	✓ Closing fragment
09-20 00:24	80m	+1 / -2	S57TW	+20 / +7	4	✓ Full exchange observed
09-20 00:23	80m	-4 / -12	UF4S	+8 / -4	4	✓ Full exchange observed
09-20 00:21	80m	+4 / -9	R8PD	-12 / -24	4	✓ Full exchange observed
09-20 00:19	80m	-4 / -7	SV3CEZ	-10 / -7	4	✓ Full exchange observed
09-20 00:17	80m	-10 / +2	DO1ZTR	-12 / -14	4	✓ Full exchange observed
09-20 00:11	160m	-14 / -	G6PZ	- / -11	2	Partial capture
09-20 00:08	160m	-15 / -15	DF3JO	-13 / -12	5	✓ Full exchange observed
09-20 00:06	160m	-14 / -12	DO5PY	-24 / -11	3	✓ Full exchange observed
09-19 02:45	160m	-17 / -	OD5XX	- / -6	5	Partial capture
09-19 02:38	160m	-20 / -	OD5XX	- / -12	2	Partial capture
09-19 02:34	160m	-14 / -	OD5XX	- / -4	2	Partial capture
09-19 02:31	160m	-16 / -	CT2GQA	- / -14	4	Partial capture
09-19 02:29	160m	-17 / +2	HA7TM	+11 / +7	4	✓ Full exchange observed
09-19 02:28	160m	-14 / -	PF7DKW	- / -6	2	Partial capture
09-14 01:14	160m	-19 / -11	OK2IT	+21 / +5	3	✓ Full exchange observed
09-13 23:30	160m	- / -14	SP3CUG	+10 / -	5	✓ Closing fragment
09-13 23:28	160m	-20 / -	RW9AW	- / -17	2	Partial capture
09-13 21:53	160m	-17 / -17	G4ATX	-6 / -16	13	✓ Full exchange observed
09-13 21:52	160m	-18 / -	9A5E	-1 / +2	3	✓ Closing observed
09-13 21:50	160m	-21 / -7	SM6LRY	-12 / -18	4	✓ Full exchange observed
09-13 21:48	160m	-15 / -	G4ATX	- / -19	3	Partial capture
09-13 21:40	160m	-18 / -12	DL1IP	-16 / -14	4	✓ Full exchange observed
09-13 00:12	160m	-17 / -20	EA5YI	-13 / +1	5	✓ Full exchange observed
09-13 00:11	160m	-16 / -14	SP6LUV	+8 / +2	4	✓ Full exchange observed
09-13 00:07	80m	-12 / -	UB0SMX/P	- / +3	2	Partial capture
09-13 00:03	80m	-12 / +2	E75C	+10 / -	4	✓ Full exchange observed
09-13 00:00	80m	-12 / -	VP2MAA	- / -21	6	Partial capture
09-12 23:59	80m	-14 / -17	PA0GSP	-10 / -14	4	✓ Full exchange observed
09-12 23:55	80m	-2 / -	DL9RDM	- / -	2	Partial capture
09-12 23:54	80m	-17 / -	VP2MAA	- / -24	3	Partial capture
09-12 23:50	80m	-17 / +1	9A3AUH	+14 / +7	5	✓ Full exchange observed
09-12 23:45	80m	+4 / -	EA5FD	- / -21	2	✓ Closing fragment
09-12 23:45	80m	0 / -4	DO1RWM	-6 / -14	5	✓ Full exchange observed
09-12 23:44	80m	0 / -3	YO6LM	+2 / +1	4	✓ Full exchange observed
09-12 23:40	80m	-20 / -19	OH2LV	-4 / -15	5	✓ Full exchange observed
09-12 23:38	80m	-19 / -7	OM1AGE	+5 / -18	5	✓ Full exchange observed
09-12 23:37	80m	-15 / -	IK4TVP	+4 / -	4	✓ Full exchange observed
09-12 23:36	80m	-16 / -	I1WXY	- / +10	3	✓ Closing fragment
09-12 23:34	80m	-3 / +1	DO4TYW	-13 / +2	5	✓ Full exchange observed
09-12 23:33	80m	-6 / -	CT2HEX	- / -11	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
233230  +2 2497  KY2J IU5TUD -15 (x2)
003615  +7  867  RN2F IU5TUD -04 (x2)
003900  -1 1441  JY5IB IU5TUD -06 (x2)
003945 -14 1441  IU5TUD JY5IB 73
004400  -2 2088  PD2ET IU5TUD +04 (x2)
004500  +1  789  US8KA IU5TUD +07 (x2)
004615  -1 2127  HI8J IU5TUD -05 (x4)

80m

UTC    dB Audio  Message
002815  -4 1332  IU5TUD ON4MAP 73
002830 -11 1180  DH1KJ IU5TUD +06
002845  +8 1181  IU5TUD DH1KJ R-03
002900  -4 1180  DH1KJ IU5TUD RR73
002915  -8 1778  IU5TUD GM6URC -13
002915  +5 1181  IU5TUD DH1KJ 73
002930  -7 1180  GM6URC IU5TUD R-14
002945  +0 1778  IU5TUD GM6URC -13
003000  -5 1180  GM6URC IU5TUD R-14
003015  -4 1777  IU5TUD GM6URC RR73
003030  -1 1180  GM6URC IU5TUD 73
003300  -1 1241  YO3WST IU5TUD -15
003315  -9 1242  IU5TUD YO3WST R-10
003330  -8 1241  YO3WST IU5TUD RR73
003345  -8 1242  IU5TUD YO3WST 73

160m

UTC    dB Audio  Message
000645 -24 1381  IU5TUD DO5PY R-12
000700 -12 1381  DO5PY IU5TUD RR73
000730 -16 1381  CQ IU5TUD JN53                        a1 (x2)
000815 -23 1381  IU5TUD DF3JO JO31
000830 -18 1381  DF3JO IU5TUD -12
000845  -8 1381  IU5TUD DF3JO R-15
000900 -12 1381  DF3JO IU5TUD RR73
000915  -9 1381  IU5TUD DF3JO 73
000930 -14 1381  CQ IU5TUD JN53 (x3)
001145 -17 1382  G6PZ IU5TUD -11 (x2)
001445 -20 1381  RD7O IU5TUD -12

20m

UTC    dB Audio  Message
231115 -14 2272  IU5TUD 5Z4VJ R-14 (x2)
012300 -13 1659  IU5TUD S52D R+05
012400 -10  405  IU5TUD 9A4AA 73
080315  -5 2372  IU5TUD F4HIK -18 (x3)
081445 -19 1088  CN2DX IU5TUD -01
081715  +9  602  IU5TUD OK1WE R-14 (x4)
222145  -7 2720  IU5TUD K4CAE -14 (x3)

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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