IU5PTB — 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 IU5PTB, decoded by SO8OO in southeastern Poland. 434 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 47 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-11.

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 434 FT8 messages attributed to IU5PTB as the transmitting token by decoded message structure across 47 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (45%), followed by 40 m (35%) and 10 m (11%). Most decodes (65%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

434

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 26 60m · 12 40m · 150 20m · 197 10m · 49

First attributed message: 2026-06-07
Last attributed message: 2026-10-11 20:00 UTC

Observed FT8 message patterns

Attributed sample: 434 messages
Active dates: 47 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -18 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 76, moderate (-15 to -9 dB) 156, strong (≥ -8 dB) 202.

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 IU5PTB in decoded directed-looking exchanges:

CR5VP · Portugal ×3 SQ8AZT · Poland ×2 CA3SQH · Chile J66BF · St. Lucia LW5DR · Argentina MI0JZZ · Northern Ireland JA9APS · Japan JY5IB · Jordan OH0ERF · Aland Islands SQ8NA · Poland UB0SMX · Asiatic Russia VK2WN · Australia

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 IU5PTB

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 · 120 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,089 km (approx.)
Last such locator decoded: 2026-10-11 20:00 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	IU5PTB S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-11 19:59	40m	-10 / -	BG0FQU	- / -	2	Partial capture
10-11 19:41	40m	-3 / -	GJ0KYZ	- / -4	2	Partial capture
10-11 19:38	40m	-1 / -	SQ8NA	- / -14	4	✓ Closing fragment
10-11 19:37	40m	-4 / -	SQ8AZT	- / -9	2	✓ Closing fragment
10-07 19:31	40m	-20 / -	VK3AMP	- / -	2	Partial capture
10-07 19:29	40m	-18 / -	BX4AP	- / -	2	Partial capture
10-07 19:24	40m	-1 / -	YT3IN	- / -	2	✓ Closing fragment
10-05 19:27	40m	-13 / -	A99AA	- / -	5	Partial capture
10-05 19:11	80m	+1 / 0	SQ8AZT	-9 / -	4	✓ Closing observed
10-05 19:09	80m	+1 / -	IU3UJX	- / -19	3	✓ Closing fragment
10-05 19:06	80m	0 / -19	SQ5ANT	+11 / -7	4	✓ Full exchange observed
09-20 19:00	80m	- / +5	IQ0AAI	-6 / -	2	✓ Closing fragment
09-20 18:50	60m	- / -6	II8IHBC	-10 / -	2	✓ Closing fragment
09-17 19:13	40m	-7 / -	DB26YLBB	- / 0	2	Partial capture
09-14 19:43	40m	-1 / -	SP0YAGI	- / -14	3	Partial capture
09-14 19:43	40m	- / +4	PH82LIB	-6 / -	3	Partial capture
09-14 19:40	40m	+2 / -	SP0YAGI	- / -	2	Partial capture
09-14 19:22	60m	- / -	EA1IOK	-7 / -	3	Partial capture
09-14 19:19	60m	-20 / +4	II8IHBC	-4 / -3	2	Partial capture
09-14 06:49	40m	-7 / +5	II6IGTO	-16 / -18	5	Partial capture
09-14 06:47	40m	-8 / -	R3DIK/M	- / -8	4	Partial capture
09-13 19:36	40m	-9 / -	JY5IB	- / -17	4	✓ Closing fragment
09-12 21:07	80m	-8 / -	SV8/F6BLP	- / -18	4	Partial capture
09-12 21:02	80m	-14 / -2	II8IHBC	-8 / -7	3	Partial capture
09-12 21:01	80m	-6 / -	SN40KZE	- / -11	2	Partial capture
09-12 20:30	40m	- / -	UR9QQ	-10 / -	4	Partial capture
09-12 20:27	40m	0 / -	II0IHMG	- / -18	2	Partial capture
09-12 20:26	40m	-6 / -	OM1DLC/P	- / -18	3	Partial capture
09-03 05:10	40m	-10 / -	II7MGBR	-14 / -9	3	Partial capture
09-03 05:10	40m	-10 / -	II7MGXX	- / -3	2	Partial capture
09-03 05:08	40m	- / -	F5PBG	-15 / -	3	Partial capture
09-03 05:05	40m	-5 / -8	II7MGBA	-3 / -5	5	Partial capture
09-01 19:28	40m	+1 / -	DL/ON4AVV/P	- / -6	3	Partial capture
08-31 20:37	40m	- / -10	M7CWF	-11 / -	3	Partial capture
08-31 20:31	40m	+7 / +8	II7MGBT	+2 / -6	3	Partial capture
08-31 20:29	40m	-1 / -10	M7CWF	-12 / -6	12	Partial capture
08-30 20:02	60m	- / -18	SP9UPH	+16 / -	2	Partial capture
08-30 20:01	60m	- / -16	DL5DQZ	-1 / -	7	✓ Closing fragment
08-29 19:42	80m	- / -14	II7MGXX	+4 / -	2	Partial capture
08-27 10:47	10m	-12 / -	5W1SA	- / -	4	Partial capture
08-26 20:00	20m	+3 / -	BA4VDC	- / -	2	Partial capture
08-26 19:58	20m	-5 / -	BD6IIC	- / -	5	Partial capture
08-25 19:57	60m	-19 / -	<...>	- / -	2	Partial capture
08-20 13:45	20m	-10 / -	RW9WT	- / -11	7	Partial capture
08-16 20:03	10m	- / -	PA1GLD	-13 / -	2	Partial capture
08-16 19:57	20m	-14 / -	CR5VP	- / -16	2	Partial capture
08-15 20:33	40m	- / -	9A1CCB	-2 / -	3	Partial capture
08-15 20:14	40m	-14 / -	CR5VP	- / -18	2	Partial capture
08-15 20:11	40m	-7 / -	CR5VP	- / -18	2	Partial capture
08-15 16:59	20m	- / -8	CR5VP	-16 / -	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
192930 -16 1119  BX4AP IU5PTB JN53 (x2)
193130 -20 1119  VK3AMP IU5PTB JN53 (x2)
193715  -4 1251  SQ8AZT IU5PTB R-09 (x2)
193815  -2 1250  SQ8NA IU5PTB JN53 (x4)
194115  -1 1250  GJ0KYZ IU5PTB R-04 (x2)
195945 -11 1457  BG0FQU IU5PTB JN53 (x2)
200045 -12 1456  VU3OSA IU5PTB JN53

80m

UTC    dB Audio  Message
210915  -9 1782  SV8/F6BLP IU5PTB R-18
185730  +3  558  IU5PTB II9IAGM +02
190000  -8 1351  IU5PTB IQ0AAI +05 (x2)
190615  -3  983  SQ5ANT IU5PTB JN53
190630  +8 1446  IU5PTB SQ5ANT -19
190645  +4  983  SQ5ANT IU5PTB R-07
190700 +14 1446  IU5PTB SQ5ANT RR73
190900  -1  983  IU3UJX IU5PTB JN53 (x3)
191115  +0  983  SQ8AZT IU5PTB JN53
191230  -9 1813  IU5PTB SQ8AZT +00 (x2)
191315  +2  983  SQ8AZT IU5PTB 73

60m

UTC    dB Audio  Message
200345 +18 2494  IU5PTB SP9UPH R-18
200400  +0 1780  IU5PTB DL5DQZ 73
201930  -8 2771  IU5PTB II7IABB -11
202015 -20 1353  S5/M0MPM IU5PTB R-12
194145 -18 1067  II0IHMG IU5PTB R-13
194345 -20 1067  II8IHBC IU5PTB JN53
191730 -19 1533  IU5PTB RR73; IU0TZZ <...> +06
191900  -4  785  IU5PTB II8IHBC +04
191915 -20 1453  II8IHBC IU5PTB R-03
192130  -4 1454  IU5PTB LB5WB -11
192230  -8  729  IU5PTB EA1IOK IN62 (x3)
185030 -11 2645  IU5PTB <II8IHBC> -06 (x2)

10m

UTC    dB Audio  Message
162700  -7  332  PU2LSP IU5PTB -16
163115  -6  332  TN8GD IU5PTB +01 (x2)
163330  -7  332  CX2SA IU5PTB -11 (x5)
193000 -13 1136  CR5VP IU5PTB JN53
200330 -15 1524  IU5PTB PA1GLD JO21 (x2)
104715 -17 1109  5W1SA IU5PTB JN53 (x4)

20m

UTC    dB Audio  Message
195930 -19 1419  CR5VP IU5PTB -16
134530 -16  643  RW9WT IU5PTB -11 (x7)
195815  -7 1113  BD6IIC IU5PTB JN53 (x5)
200045  +1 1113  BA4VDC IU5PTB JN53 (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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