JH4RUF — 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: PM74

Receiver-side FT8 activity involving JH4RUF, decoded by SO8OO in southeastern Poland. 1 FT8 messages attributed to this token as transmitter, on 40m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-06.

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 1 FT8 messages attributed to JH4RUF as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The available sample contains attributed decodes on 40 m (100%). The sample is too small to infer a recurring UTC-hour or received-S/N pattern.

Overview

1
Messages attributed
1
UTC dates decoded
1
Active 15-min windows
-
S/N pattern not inferred

Bands

40m · 1
First attributed message: 2026-09-06
Last attributed message: 2026-09-06 20:43 UTC

Observed FT8 message patterns

Attributed sample
1 messages
Active dates
1 UTC dates
S/N summary
Too few decodes
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

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 JH4RUF in decoded directed-looking exchanges:

Most frequent locator attributed to JH4RUF

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
PM74
SO8OO receiver locator
KN09VW
Locator-centre separation
8,565 km (approx.)
Last such locator decoded
2026-09-06 20:43 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 UTCBandJH4RUF S/NCounterpartCounterpart S/NMsgsCapture
10-23 20:33 160m - / -11 4J3DJ +3 / - 4 ✓ Closing fragment
10-17 17:11 40m - / -14 SV1AER -1 / - 2 ✓ Closing fragment
10-11 18:31 40m - / - DK5WL -6 / - 2 Partial capture
10-09 20:01 160m - / - UA6BRD -18 / - 5 Partial capture
10-09 19:38 160m - / - UA6BRD -19 / - 4 Partial capture
09-25 20:29 160m - / - RW1C +11 / - 2 Partial capture
09-21 19:54 40m - / -21 DK7ZT +3 / - 2 Partial capture
09-06 20:37 40m - / -22 DK7ZT -5 / - 4 Partial capture
09-06 20:32 40m - / -7 LZ1GC +17 / - 9 ✓ Closing fragment
09-06 20:31 40m - / -10 R8CKD -7 / - 3 ✓ Closing fragment
09-06 20:30 40m - / -13 SV5BYP -2 / - 2 ✓ Closing fragment
09-05 19:57 40m - / -17 EA7ST +14 / - 3 ✓ Closing fragment
09-03 18:19 160m - / -16 S57MPU +16 / - 7 ✓ Closing fragment
08-29 21:27 40m - / - DF7EF +4 / - 2 Partial capture
08-21 15:13 20m - / -9 PA2JCB -2 / - 2 Partial capture
08-21 15:10 20m - / - DL1R +11 / - 8 Partial capture
08-21 15:10 20m - / -7 DL8TV +10 / - 4 ✓ Closing fragment
08-21 15:08 20m - / - SP6AXW -15 / - 4 Partial capture
08-21 15:06 20m - / - DB9LG +2 / - 2 Partial capture
08-21 15:03 20m - / -5 RK4PR -8 / - 2 ✓ Closing fragment
08-21 14:59 20m - / 0 LZ2INP -11 / - 14 ✓ Closing fragment
08-21 14:56 20m - / - M0LAD -3 / - 2 Partial capture
08-21 14:56 20m - / -9 ON6AA +20 / - 2 ✓ Closing fragment
08-21 14:52 20m - / - ON6AA +10 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
203815  -3 1906  JH4RUF DK7ZT -22 (x2)
204315 -24 1869  CN8NS JH4RUF PM74
195230  -4  979  JH4RUF S57BTI JN75
195400  -1 1906  JH4RUF DK7ZT -21 (x2)
195600  -4 2692  JH4RUF DF7EF JO30
182530  -3 1878  JH4RUF YT2ZE -17 (x2)
183030 -11  872  JH4RUF R6DZR KN84
183130  -5 1702  JH4RUF DK5WL JN39 (x2)
171145  +0 1971  JH4RUF SV1AER -14 (x2)
184015  -8 1626  JH4RUF Z34K -16
160m 
UTC    dB Audio  Message
203000 +12 1222  JH4RUF RW1C KO49
193830 -18 1680  JH4RUF UA6BRD LN05 (x9)
202130  +8 2231  JH4RUF R5AJ -14
203315  +3 2769  JH4RUF 4J3DJ -11 (x4)
20m 
UTC    dB Audio  Message
151030  +8 2655  JH4RUF DL1R JN58
151100  +1  363  JH4RUF DL9IQ JO40
151100 +11 2374  JH4RUF DL8TV JN49
151100 +15 2656  JH4RUF DL1R JN58
151200 +15 2374  JH4RUF DL8TV R-07
151200  +9 2655  JH4RUF DL1R JN58
151230  +6 2374  JH4RUF DL8TV 73
151230  +6 2655  JH4RUF DL1R JN58 (x2)
151330  -3  699  JH4RUF PA2JCB JO21
151330 +11 2655  JH4RUF DL1R JN58
151400  -2  699  JH4RUF PA2JCB R-09
151400 +13 2655  JH4RUF DL1R JN58 (x2)
151600  -4  927  JH4RUF PA3DTR JO21

CW

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

Explore CW reception at SO8OO

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