IU4PSX — 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 IU4PSX, decoded by SO8OO in southeastern Poland. 69 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-10 and 2026-10-24.

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 69 FT8 messages attributed to IU4PSX as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (59%), followed by 10 m (25%) and 40 m (16%). Most decodes (77%) fell within the six-hour window 12:00-18:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

40m · 11 20m · 41 10m · 17

First attributed message: 2026-07-10
Last attributed message: 2026-10-24 16:37 UTC

Observed FT8 message patterns

Attributed sample: 69 messages
Active dates: 5 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -20 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 21, moderate (-15 to -9 dB) 17, strong (≥ -8 dB) 31.

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 IU4PSX in decoded directed-looking exchanges:

DL5OBY · Fed. Rep. of Germany DO9BAU · Fed. Rep. of Germany 4X1UF · Israel 9A4ZM · Croatia DL8YBL · Fed. Rep. of Germany LA2GCA · Norway OE8PIT · Austria SP6AXW · Poland TF4M · Iceland

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 IU4PSX

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 · 43 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,013 km (approx.)
Last such locator decoded: 2026-10-24 16:37 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	IU4PSX S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-11 17:51	20m	-6 / +4	TF4M	-10 / -	4	✓ Closing observed
08-11 17:27	20m	-2 / -	XU7O	- / -	3	Partial capture
08-11 17:24	10m	-8 / -	LY1NM	- / -	3	Partial capture
08-11 17:22	10m	-17 / -	DO9BAU	- / +4	2	✓ Closing fragment
08-11 17:21	10m	-22 / -	DL5OBY	- / +4	2	✓ Closing fragment
08-11 17:20	10m	- / -	IZ3EAW	-3 / -	7	Partial capture
08-11 17:18	10m	-15 / -	OH0ERF	- / -7	3	Partial capture
08-11 17:14	10m	-10 / -	LY1NM	- / -	7	Partial capture
08-11 16:29	20m	+2 / -	E75RKM	- / -	2	Partial capture
08-11 16:27	20m	0 / -	SP6AXW	-3 / +6	3	✓ Closing observed
08-11 16:26	20m	+6 / -	4X1UF	- / -18	2	✓ Closing fragment
08-11 16:20	20m	+2 / -	S21SDR	- / -	6	Partial capture
08-10 10:37	20m	-16 / -	S09S	- / -	7	Partial capture
08-10 10:32	20m	-12 / -25	OE8PIT	-11 / -18	8	✓ Full exchange observed
08-10 10:21	20m	- / -11	DL8YBL	-19 / -	4	✓ Closing fragment
08-10 10:10	20m	- / -5	9A4ZM	-10 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
163715  -7 2333  RT8T IU4PSX JN54

20m

UTC    dB Audio  Message
162415  -5 2103  S21SDR IU4PSX JN54
162600  +5 2102  4X1UF IU4PSX R-18 (x2)
162700  -2 2102  SP6AXW IU4PSX +06 (x2)
162745  -3 1846  IU4PSX SP6AXW 73
162900  +2 2102  E75RKM IU4PSX JN54 (x2)
172715  -4 2155  XU7O IU4PSX JN54 (x3)
175100  -5 1881  TF4M IU4PSX JN54
175115  -9 2228  IU4PSX TF4M +04 (x2)
175200  -6 1881  TF4M IU4PSX 73

10m

UTC    dB Audio  Message
171930 -19 1385  OH0ERF IU4PSX R-07
172045  +1  509  IU4PSX IZ3EAW JN55 (x2)
172130 -21 1385  DL5OBY IU4PSX +04
172145  -2  510  IU4PSX IZ3EAW JN55
172200 -22 1385  DL5OBY IU4PSX RR73
172215  -3  510  IU4PSX IZ3EAW JN55
172230 -23 1385  DO9BAU IU4PSX +04
172245  -4  510  IU4PSX IZ3EAW JN55
172300 -11 1385  DO9BAU IU4PSX RR73
172315  +0  510  IU4PSX IZ3EAW JN55 (x2)
172445 -10 2170  LY1NM IU4PSX JN54 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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