JH1XEF — 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: PM95

Receiver-side FT8 activity involving JH1XEF, decoded by SO8OO in southeastern Poland. 52 FT8 messages attributed to this token as transmitter, on 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-08-27.

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 52 FT8 messages attributed to JH1XEF as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

52
Messages attributed
8
UTC dates decoded
16
Active 15-min windows
-14 dB
Estimated median S/N

Bands

20m · 52
First attributed message: 2026-06-08
Last attributed message: 2026-08-27 22:29 UTC

Observed FT8 message patterns

Attributed sample
52 messages
Active dates
8 UTC dates
Estimated median S/N
-14 dB
Estimated 10th-90th percentile
-19 to -9 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 21, moderate (-15 to -9 dB) 26, strong (≥ -8 dB) 5.

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 JH1XEF in decoded directed-looking exchanges:

Most frequent locator attributed to JH1XEF

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
PM95 · 32 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,693 km (approx.)
Last such locator decoded
2026-08-23 21:47 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 UTCBandJH1XEF S/NCounterpartCounterpart S/NMsgsCapture
11-03 21:43 40m - / -14 IK1MJL +1 / - 2 ✓ Closing fragment
10-30 21:24 40m - / - R2AL -20 / - 2 Partial capture
10-20 21:09 40m - / -13 OS4K -19 / - 4 Partial capture
10-19 20:57 40m - / -19 F1DJY +11 / - 2 ✓ Closing fragment
10-14 21:27 40m - / -12 IZ8CLM -14 / - 2 ✓ Closing fragment
10-13 21:59 40m - / -14 UN0GY -8 / - 2 ✓ Closing fragment
09-25 21:07 40m - / -10 9A60CBM -13 / - 2 Partial capture
09-19 21:30 40m - / -20 R3XBS +2 / - 2 ✓ Closing fragment
09-12 20:51 40m - / -15 OH5KT -5 / - 2 ✓ Closing fragment
09-03 20:28 40m - / - R3KGN 0 / - 2 ✓ Closing fragment
09-03 20:25 40m - / -16 LA1KUA +9 / - 3 ✓ Closing fragment
09-03 20:22 40m - / -11 I2VGW +8 / - 4 ✓ Closing fragment
09-03 20:15 40m - / -15 TA3NK -9 / - 6 ✓ Closing fragment
09-03 20:15 40m - / - UT7HX +14 / - 2 ✓ Closing fragment
09-03 20:13 40m - / -18 LY3CY +12 / - 3 ✓ Closing fragment
09-03 20:12 40m - / - IK2WRI +6 / - 2 Partial capture
09-03 20:08 40m - / - OK1UG +6 / - 3 Partial capture
09-03 20:08 40m - / -13 ON4IQ +17 / - 3 ✓ Closing fragment
09-03 20:04 40m - / -15 SP5LST -14 / - 3 ✓ Closing fragment
09-03 19:48 40m - / -19 II7MGML -2 / - 2 Partial capture
08-26 22:01 20m - / -23 9A3TY -11 / - 2 ✓ Closing fragment
08-24 22:20 20m - / -2 DR800WE +6 / - 2 Partial capture
08-23 21:46 20m -11 / - GW0ARK +6 / - 2 ✓ Closing observed
08-23 21:44 20m - / -10 EA5W -6 / - 3 ✓ Closing fragment
08-23 21:40 20m -8 / - LZ1EV - / - 2 Partial capture
08-23 21:12 40m - / -18 YO4NT +6 / - 2 ✓ Closing fragment
08-21 21:43 20m - / -16 ON3KJU -6 / - 2 ✓ Closing fragment
08-17 21:46 20m - / -23 YO4ATW -4 / - 2 ✓ Closing fragment
08-14 21:59 20m - / -18 SV5BYP -8 / - 5 Partial capture
08-14 21:56 20m - / -13 F6EKI -19 / - 5 ✓ Closing fragment
08-11 22:29 20m - / -10 HB9HBY -2 / - 2 ✓ Closing fragment
08-11 22:24 20m - / -18 EA1N +6 / - 2 ✓ Closing fragment
08-11 21:45 20m - / -12 CR5VP -10 / - 2 ✓ Closing fragment
08-11 21:36 20m - / -13 IZ2CPO/QRP -20 / - 2 ✓ Closing fragment
08-09 21:37 20m - / -9 IN3VVK +10 / - 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
212830 -11  854  JH1XEF SV1MOZ KM17
205715 +10  665  JH1XEF F1DJY -19 (x2)
210915 -23 1930  JH1XEF OS4K -13 (x4)
210100 -18 1131  JH1XEF UN7PPV -14
212315  -9  889  JH1XEF TA4SSK -05
212415 -21 1198  JH1XEF R2AL KO85 (x2)
212915 -12  984  JH1XEF 5B4AMX +03
213945 -17 2371  JH1XEF IW0BSQ -12
214300  +2 2308  JH1XEF IK1MJL R-14 (x2)
80m 
UTC    dB Audio  Message
203300 -10 2577  JH1XEF V51WH RR73
202500  -2  739  JH1XEF TA3GO -19
210030 -17 2743  JH1XEF D2UY -19
20m 
UTC    dB Audio  Message
214045  -9  440  LZ1EV JH1XEF PM95 (x2)
214400  -9  440  ER3BN JH1XEF 73
214415  -7 1812  JH1XEF EA5W IM97 (x3)
214615  +6 2120  JH1XEF GW0ARK RR73
214630 -11  440  GW0ARK JH1XEF 73
214700  -4  440  F4HTA JH1XEF PM95
222015  +2 2902  JH1XEF DR800WE -02 (x3)
220115 -11 1914  JH1XEF 9A3TY -23 (x2)
222945 -21 1770  DL7JLC JH1XEF R-16

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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