IU5RBX — 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: JN53

Receiver-side FT8 activity involving IU5RBX, decoded by SO8OO in southeastern Poland. 537 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 58 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-11-05.

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 537 FT8 messages attributed to IU5RBX as the transmitting token by decoded message structure across 58 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (42%), followed by 40 m (26%) and 80 m (11%). Most decodes (57%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14.2 dB.

Overview

537

Messages attributed

UTC dates decoded

121

Active 15-min windows

-14.2 dB

Estimated median S/N

Bands

160m · 6 80m · 60 60m · 57 40m · 142 20m · 225 10m · 47

First attributed message: 2026-06-07
Last attributed message: 2026-11-05 20:14 UTC

Observed FT8 message patterns

Attributed sample: 537 messages
Active dates: 58 UTC dates
Estimated median S/N: -14.2 dB
Estimated 10th-90th percentile: -22 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 231, moderate (-15 to -9 dB) 217, strong (≥ -8 dB) 89.

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 IU5RBX in decoded directed-looking exchanges:

R2AL · European Russia RD0L · Asiatic Russia J38DX · Grenada M1DBW · England MI7XHT · Northern Ireland RI1FJL · Franz Josef Land SV9QWC · Crete 9H6C · Malta GM4YTD · Scotland J48S · Greece PA1AA · Netherlands W2RAL · United States

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 IU5RBX

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 · 435 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,089 km (approx.)
Last such locator decoded: 2026-11-05 20:14 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	IU5RBX S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-05 20:12	80m	-24 / -	TA7MMI	- / -	3	Partial capture
11-05 19:53	80m	-20 / -	TA7MMI	- / -	2	Partial capture
11-03 13:04	10m	-21 / -	<...>	- / -	7	Partial capture
11-03 12:59	10m	-21 / -	<...>	- / -	3	Partial capture
11-02 19:58	40m	-24 / -	MI7XHT	-5 / -	2	✓ Closing observed
11-02 19:53	40m	- / -11	M1DBW	-10 / -	2	✓ Closing fragment
11-02 19:40	160m	-22 / -	EI4DQ	- / -	2	Partial capture
11-01 19:28	80m	-10 / -	5B4AMX	- / -	3	Partial capture
11-01 00:31	60m	-16 / -	WA1HXH	- / -	2	Partial capture
11-01 00:27	60m	-12 / -	WN3DX	- / -17	4	✓ Closing fragment
11-01 00:25	60m	-14 / -	N6AR	- / -	2	Partial capture
11-01 00:22	60m	-13 / -	WB0CWJ	- / -23	3	✓ Closing fragment
11-01 00:21	60m	-14 / -	W2RAL	- / -23	4	✓ Closing fragment
10-31 14:13	10m	-21 / -	SU1AS	- / -	5	Partial capture
10-29 18:10	80m	-20 / -	IS0SNE	- / -23	7	Partial capture
10-23 05:20	40m	-10 / -	SV8/SV1TQB	- / -	2	Partial capture
10-21 04:54	80m	-16 / -17	KF8EXX	-6 / -	3	Partial capture
10-17 20:42	40m	-5 / -	NC3S	- / -	2	Partial capture
10-16 05:27	80m	-23 / -19	Z61DX	-12 / -15	6	✓ Full exchange observed
10-11 19:03	60m	-21 / -	9H6C	- / -9	3	✓ Closing fragment
10-11 18:54	60m	-20 / -	9H6C	- / -	3	Partial capture
10-10 19:19	80m	-13 / -	9H6C	- / -	3	Partial capture
10-10 19:10	80m	-17 / -	9H6C	- / -19	2	Partial capture
10-06 19:16	40m	-11 / -	HB0PA	- / -	8	Partial capture
10-03 22:18	60m	-11 / -14	PA1AA	-8 / -3	6	✓ Full exchange observed
10-03 22:16	60m	-11 / -	SM1NJC	- / -19	2	Partial capture
10-03 21:48	60m	-7 / -6	J48S	-14 / -15	5	✓ Full exchange observed
10-01 04:56	60m	-3 / -	ZF1EJ	-20 / -19	6	✓ Closing observed
09-25 05:27	80m	- / -13	Z62NS	-4 / -	2	✓ Closing fragment
09-25 05:01	80m	-16 / -	W4PSK	- / -	4	Partial capture
09-22 21:04	80m	-16 / -	UA4FKT	+4 / -10	4	Partial capture
09-22 21:02	80m	-14 / -7	EI9FVB	-2 / -24	6	✓ Full exchange observed
09-22 20:59	60m	- / -	DG4BRT	-7 / -	2	Partial capture
09-22 20:58	60m	-14 / -6	GM4YTD	-10 / -15	4	✓ Full exchange observed
09-21 18:02	40m	+2 / -	KH8WW	- / -	2	Partial capture
09-21 16:46	40m	-2 / -	KH8WW	- / -	8	Partial capture
09-21 16:40	40m	-2 / -	KH8WW	- / -	3	Partial capture
09-21 16:18	40m	-2 / -	KH8WW	- / -	2	Partial capture
09-20 19:39	80m	- / -	F5MXH	-6 / -	2	Partial capture
09-20 19:37	80m	-11 / -	EA6Y	+12 / -4	7	✓ Closing observed
09-13 18:27	40m	-16 / -	SV9QWC	- / -8	5	✓ Closing fragment
09-11 04:56	40m	-13 / -	F5OYA/P	- / -4	4	Partial capture
09-11 04:41	40m	-15 / -	J38DX	- / -23	17	✓ Closing fragment
09-09 16:08	60m	- / -4	Z68PX	-4 / -	2	✓ Closing fragment
09-04 19:35	80m	-19 / -	SV8JE	- / -	3	Partial capture
09-04 04:12	40m	-8 / -	KQ4RLN	- / -	11	Partial capture
08-31 20:54	80m	-22 / -	OH0Z	- / -	3	Partial capture
08-31 20:51	80m	-24 / -11	9A3TGY	-2 / -15	7	✓ Full exchange observed
08-30 13:16	20m	-12 / -	RI1FJL	- / -	2	Partial capture
08-29 00:51	40m	-15 / -	V47JA	- / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
181115 -20 1805  IS0SNE IU5RBX R-25 (x5)
192845 -11 2000  5B4AMX IU5RBX JN53 (x3)
194130 -24 1680  UN0GY IU5RBX JN53
195330 -17 1595  TA7MMI IU5RBX JN53 (x6)

10m

UTC    dB Audio  Message
141345 -18 1696  SU1AS IU5RBX JN53 (x5)
125900 -23 2066  <...> IU5RBX JN53 (x10)

40m

UTC    dB Audio  Message
191815  -8 2140  HB0PA IU5RBX JN53 (x4)
045545 -18 1558  YY5EHT IU5RBX JN53
204200  -5 2901  NC3S IU5RBX JN53 (x2)
051400 -15 2023  YV6BXN IU5RBX JN53
051845 -18 1722  V47NT IU5RBX JN53
052045  -8 1722  SV8/SV1TQB IU5RBX JN53 (x2)
195300  -9 1159  IU5RBX M1DBW -11 (x2)
195845  -5  455  IU5RBX MI7XHT RR73
195900 -24 1641  MI7XHT IU5RBX 73

160m

UTC    dB Audio  Message
210100 -24 1958  Z31PM IU5RBX R-09
210230 -22 1958  RI1FJZ IU5RBX JN53
210700 -23 1660  EW6FL IU5RBX JN53
193600 -24 1603  F4FTV IU5RBX R-06
194030 -23 1722  EI4DQ IU5RBX JN53 (x2)

60m

UTC    dB Audio  Message
002230 -11 1634  WB0CWJ IU5RBX R-23 (x2)
002330 -17 1634  W2RAL IU5RBX JN53 (x3)
002500 -13 1634  N6AR IU5RBX JN53 (x2)
002700 -16 1634  WN3DX IU5RBX JN53 (x4)
002900 -14 1635  W4EBB IU5RBX JN53
003000 -13 1635  KQ4KX IU5RBX JN53
003100 -16 1635  WA1HXH IU5RBX JN53 (x2)

20m

UTC    dB Audio  Message
161715 -11 1838  RI1FJL IU5RBX JN53 (x9)
162230  +3 2854  IU5RBX IU5HIU JN53
162245 -11 1838  RI1FJL IU5RBX JN53 (x5)

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

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee