IU4QRW — 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: JN54

Receiver-side FT8 activity involving IU4QRW, decoded by SO8OO in southeastern Poland. 71 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-12 and 2026-10-31.

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 71 FT8 messages attributed to IU4QRW as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (39%), followed by 80 m (31%) and 20 m (27%). Most decodes (100%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (87%); the estimated median was -1 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-1 dB

Estimated median S/N

Bands

80m · 22 40m · 28 20m · 19 10m · 2

First attributed message: 2026-06-12
Last attributed message: 2026-10-31 21:50 UTC

Observed FT8 message patterns

Attributed sample: 71 messages
Active dates: 6 UTC dates
Estimated median S/N: -1 dB
Estimated 10th-90th percentile: -11 to +4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 62.

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 IU4QRW in decoded directed-looking exchanges:

9X5KM · Rwanda 9J2FI · Zambia OA4ENG · Peru OD5ZZ · Lebanon OK1WCF · Czech Republic TN8GD · Republic of the Congo UA4FKT · European Russia 4O7CC · Montenegro

Most frequent locator attributed to IU4QRW

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 · 41 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,013 km (approx.)
Last such locator decoded: 2026-10-31 21:50 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	IU4QRW S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-01 10:06	10m	- / +1	9X5KM	-23 / -	2	✓ Closing fragment
10-31 22:25	80m	- / +4	4O7CC	0 / -	2	✓ Closing fragment
10-31 21:50	80m	+11 / -	W2NTN	- / -	2	Partial capture
10-31 21:46	80m	-4 / -	6W/IK2HKT	- / -	2	Partial capture
10-31 21:25	80m	-1 / -	4O4A	- / -	14	Partial capture
08-31 23:26	40m	-8 / 0	OD5ZZ	-11 / -3	4	✓ Full exchange observed
08-31 23:22	40m	+2 / -	KD2WBX	- / -17	4	Partial capture
08-31 23:08	40m	+2 / -	TN8GD	- / -13	6	✓ Closing fragment
08-31 23:04	40m	0 / -	5N0YEN	- / -	3	Partial capture
08-31 23:03	40m	+2 / -	OK1WCF	- / -10	2	✓ Closing fragment
08-31 23:02	40m	+3 / +2	UA4FKT	+10 / -	4	✓ Closing observed
08-31 23:00	40m	0 / -	9J2FI	- / -12	4	✓ Closing fragment
08-31 22:58	40m	+1 / -	OA4ENG	- / -10	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
100600 -22 1369  IU4QRW 9X5KM +01 (x2)

80m

UTC    dB Audio  Message
213045  +3 2262  4O4A IU4QRW JN54 (x8)
214615  -4 2698  6W/IK2HKT IU4QRW JN54 (x2)
214815 +10 2901  <...> IU4QRW JN54
215000  +9 2901  W2NTN IU4QRW JN54 (x2)
222500  +1  613  IU4QRW 4O7CC +04 (x2)

40m

UTC    dB Audio  Message
230815  -1 2460  TN8GD IU4QRW JN54 (x6)
232115  +1 2460  CQ IU4QRW JN54
232215  +0 2460  KD2WBX IU4QRW -17 (x4)
232615 -12 2362  OD5ZZ IU4QRW JN54
232630 -11  490  IU4QRW OD5ZZ +00
232645  -3 2361  OD5ZZ IU4QRW R-03 (x2)

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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