JF1PUW — 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: Japan Most frequent locator attributed to this token: QM05

Receiver-side FT8 activity involving JF1PUW, decoded by SO8OO in southeastern Poland. 15 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-25 and 2026-11-06.

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 15 FT8 messages attributed to JF1PUW as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (80%), followed by 80 m (20%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

80m · 3 20m · 12

First attributed message: 2026-08-25
Last attributed message: 2026-11-06 20:51 UTC

Observed FT8 message patterns

Attributed sample: 15 messages
Active dates: 3 UTC dates
Estimated median S/N: -11 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 6.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with JF1PUW in decoded directed-looking exchanges:

YO4NF · Romania ×2 5N0YEN · Nigeria BA8BLK · China C31CT · Andorra D2IM · Angola F5PBG · France RD3FY · European Russia SP5XMD · Poland TA1CQ · European Turkey R3SN · European Russia E74A · Bosnia-Herzegovina OM2IB · Slovak Republic

Most frequent locator attributed to JF1PUW

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: QM05 · 5 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,798 km (approx.)
Last such locator decoded: 2026-11-06 20:51 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	JF1PUW S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-06 21:12	80m	- / -16	R7FG	-2 / -	2	Partial capture
11-06 21:08	80m	- / -15	YO4NF	+7 / -	4	✓ Closing fragment
11-06 21:06	80m	- / -	RA3ZH	-10 / -	3	Partial capture
11-06 20:53	80m	- / -14	E74A	+14 / -	2	✓ Closing fragment
11-06 20:51	80m	- / -	RO2X	+3 / -	8	Partial capture
11-06 20:50	80m	-23 / -	E74A	- / -	2	Partial capture
11-06 20:31	80m	- / -	RO2X	-4 / -	2	Partial capture
11-06 20:31	80m	- / -	UT7UA	-1 / -	2	Partial capture
08-30 21:15	40m	- / -9	R3SN	-6 / -	2	✓ Closing fragment
08-30 21:11	40m	- / -	9A4ZM	+6 / -	2	Partial capture
08-25 21:21	20m	-12 / -12	F5PBG	+8 / -	4	✓ Closing observed
08-25 21:21	20m	-4 / -	5N0YEN	- / -14	2	✓ Closing fragment
08-25 21:19	20m	-8 / -	RD3FY	- / -4	2	✓ Closing fragment
08-25 21:18	20m	-13 / -5	BA8BLK	-10 / -6	3	✓ Full exchange observed
08-25 21:17	20m	-10 / -	SP5XMD	- / -11	2	✓ Closing fragment
08-25 12:18	20m	-16 / -	EU2Q	- / -	2	Partial capture
08-24 21:09	20m	- / -16	D2IM	0 / -	3	✓ Closing fragment
08-24 21:03	20m	- / -9	C31CT	+10 / -	2	✓ Closing fragment
08-21 12:46	20m	- / -	RL3K	-6 / -	11	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
205345  +6 2420  JF1PUW RO2X KO74
205345 +16  768  JF1PUW E74A RR73
205415  +1 2420  JF1PUW RO2X KO74 (x3)
210615 -11 1966  JF1PUW RA3ZH KO81 (x3)
210745  +7 1800  JF1PUW OM2IB RR73
210815  +5 1938  JF1PUW YO4NF -15 (x4)
211215  -7 2732  JF1PUW R7FG -16 (x2)

40m

UTC    dB Audio  Message
211130  +5 2375  JF1PUW 9A4ZM JN86 (x2)
211430 +11 2377  JF1PUW YO4NF RR73
211530  -6 1467  JF1PUW R3SN R-09 (x2)
211900 -11 1296  JF1PUW LZ123RF -10

20m

UTC    dB Audio  Message
211645  -6  492  TA1CQ JF1PUW 73
211700  -1  491  JF1PUW F5PBG IN78
211715  -6  492  SP5XMD JF1PUW -11 (x2)
211800 -10  752  JF1PUW BA8BLK -05
211815 -16  492  BA8BLK JF1PUW R-06 (x2)
211915  -8  492  RD3FY JF1PUW -04 (x2)
212100  -2  492  5N0YEN JF1PUW R-14 (x2)
212145  +9  491  JF1PUW F5PBG IN78 (x2)
212230 -12  492  F5PBG JF1PUW RR73
212245  +7  492  JF1PUW F5PBG 73

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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