JF4EQJ — 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: PM65

Receiver-side FT8 activity involving JF4EQJ, decoded by SO8OO in southeastern Poland. 12 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-02 and 2026-10-12.

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 12 FT8 messages attributed to JF4EQJ as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (58%), followed by 20 m (25%) and 40 m (17%). In this small sample, the estimated median decoder S/N was -16 dB; no usual signal pattern is inferred.

Overview

12
Messages attributed
5
UTC dates decoded
6
Active 15-min windows
-16 dB
Estimated median S/N

Bands

80m · 7 40m · 2 20m · 3
First attributed message: 2026-07-02
Last attributed message: 2026-10-12 20:45 UTC

Observed FT8 message patterns

Attributed sample
12 messages
Active dates
5 UTC dates
Estimated median S/N
-16 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 3.

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 JF4EQJ in decoded directed-looking exchanges:

Most frequent locator attributed to JF4EQJ

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
PM65 · 9 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,366 km (approx.)
Last such locator decoded
2026-10-12 20:45 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 UTCBandJF4EQJ S/NCounterpartCounterpart S/NMsgsCapture
10-21 08:56 10m - / -9 CN8WK +6 / - 2 ✓ Closing fragment
10-15 21:14 80m - / - ON4IQ +15 / - 3 Partial capture
10-12 20:44 80m -17 / - EA7LIC - / - 3 Partial capture
10-05 20:28 80m -22 / -20 AO5CV +10 / - 3 Partial capture
10-02 21:01 80m - / - UA4FKT +11 / - 3 Partial capture
10-02 20:59 80m - / - RR73; -6 / - 2 Partial capture
09-23 20:49 40m - / -18 S56SD -7 / - 5 ✓ Closing fragment
09-23 20:48 40m - / -18 HB9ELE -3 / - 4 ✓ Closing fragment
09-23 20:45 40m - / -7 DK7ZT -19 / - 3 Partial capture
09-23 20:45 40m - / - RZ4FWA -24 / - 2 Partial capture
09-23 20:45 40m - / - S56SD -16 / - 2 Partial capture
09-21 20:42 80m - / -12 LX1JH +12 / - 2 ✓ Closing fragment
09-20 19:46 80m - / -11 OZ1ADL +6 / - 2 ✓ Closing fragment
09-09 20:02 40m - / -9 IK5EEA 0 / - 7 Partial capture
09-09 19:57 40m -16 / - UF2F - / - 2 Partial capture
08-10 20:00 80m - / -17 OH1MLZ +10 / - 2 ✓ Closing fragment
08-09 20:29 40m - / -18 IC8TEM -10 / - 2 ✓ Closing fragment
08-09 20:23 40m - / -19 ON5RZ 0 / - 4 ✓ Closing fragment
08-09 20:22 40m - / - LY1DY -4 / - 2 Partial capture
08-09 20:21 40m - / -9 OH0ERF -13 / - 2 ✓ Closing fragment
08-06 20:06 80m - / -16 Z62NS +5 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

160m 
UTC    dB Audio  Message
200600  -9 2487  JF4EQJ OH0Z RR73
194230 -13 1979  JF4EQJ UA4PPQ LO54
10m 
UTC    dB Audio  Message
085615  +6 2146  JF4EQJ CN8WK -09 (x2)
80m 
UTC    dB Audio  Message
210100  -4 1890  JF4EQJ RR73; JG3TRB <...> -18
210130 +11  383  JF4EQJ UA4FKT LO23 (x3)
202815 -21 2522  AO5CV JF4EQJ PM65 (x2)
202930 +10 2787  JF4EQJ AO5CV -20
203000  +7 2787  JF4EQJ RR73; JA1XEC <...> -20
212500 -17 2743  JF4EQJ D2UY RR73
204415 -15  516  EA7LIC JF4EQJ PM65 (x3)
211415 +19 2643  JF4EQJ ON4IQ JO20 (x3)
40m 
UTC    dB Audio  Message
204545 -24 1905  JF4EQJ DK7ZT -07
204615 -10 1339  JF4EQJ S56SD JN76
204615 -23 2028  JF4EQJ RZ4FWA LO23
204615 -15 1907  JF4EQJ DK7ZT -07 (x2)
204815  +2  643  JF4EQJ HB9ELE JN47 (x2)
204945  -6 1338  JF4EQJ S56SD R-18
204945  -4  643  JF4EQJ HB9ELE R-18
205015  -8 1338  JF4EQJ S56SD R-18
205015  -3  643  JF4EQJ HB9ELE 73
205045  -8 1339  JF4EQJ S56SD RR73
205045  +2  332  JF4EQJ 9A5CW JN65
205115  -8 1339  JF4EQJ S56SD RR73 (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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