JH4JNG — 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: PM75

Receiver-side FT8 activity involving JH4JNG, decoded by SO8OO in southeastern Poland. 147 FT8 messages attributed to this token as transmitter, on 80m, across 18 UTC dates in the available aggregate history. Observed between 2026-09-28 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 147 FT8 messages attributed to JH4JNG as the transmitting token by decoded message structure across 18 UTC dates in the available aggregate history. The largest monitored-band total was 80 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

147
Messages attributed
18
UTC dates decoded
39
Active 15-min windows
-14 dB
Estimated median S/N

Bands

80m · 147
First attributed message: 2026-09-28
Last attributed message: 2026-11-06 20:11 UTC

Observed FT8 message patterns

Attributed sample
147 messages
Active dates
18 UTC dates
Estimated median S/N
-14 dB
Estimated 10th-90th percentile
-22 to -7 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 61, moderate (-15 to -9 dB) 62, strong (≥ -8 dB) 24.

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 JH4JNG in decoded directed-looking exchanges:

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 JH4JNG

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
PM75 · 102 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,477 km (approx.)
Last such locator decoded
2026-11-06 20:11 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 UTCBandJH4JNG S/NCounterpartCounterpart S/NMsgsCapture
11-06 09:00 10m - / -17 EA4FQO +5 / - 3 ✓ Closing fragment
11-05 21:33 80m - / -13 HB3YFC -10 / - 2 ✓ Closing fragment
11-04 21:37 80m - / - IZ1AJJ +2 / - 2 Partial capture
11-04 21:34 80m -14 / - TA7MMI - / - 3 Partial capture
11-04 21:33 80m -10 / - CT7BRV - / - 2 Partial capture
11-04 21:32 80m - / - DG5RN +11 / - 3 Partial capture
11-04 21:30 80m -11 / -16 EA8UP -8 / -21 7 ✓ Full exchange observed
11-04 21:28 80m -13 / - CT7BRV - / - 3 Partial capture
11-04 17:28 80m - / -20 OH1NDA +6 / - 3 ✓ Closing fragment
11-03 21:50 80m - / - SP5OXJ -10 / - 2 Partial capture
11-03 21:46 80m -14 / - PI40EUDXF - / -15 2 Partial capture
11-03 21:15 80m -8 / - GU4WRP - / - 2 Partial capture
11-03 21:10 80m -10 / - GU4WRP - / - 6 Partial capture
11-03 20:54 80m - / - IU2SMI -2 / - 2 Partial capture
11-03 20:37 80m -19 / - UA9XL/P - / - 2 Partial capture
11-03 20:37 80m - / - DJ1SL -8 / - 2 Partial capture
11-02 21:52 80m - / - SP2JEL -5 / - 3 Partial capture
11-02 21:51 80m -14 / -15 DL2MIJ 0 / - 4 ✓ Closing observed
11-02 21:49 80m - / -12 DL6NDW +6 / - 4 ✓ Closing fragment
11-02 21:48 80m -13 / -7 F8FKI -6 / -13 4 ✓ Full exchange observed
11-02 21:48 80m - / - OM2WQ +14 / - 2 Partial capture
11-02 21:43 80m -10 / - UA9XL/P - / - 2 Partial capture
11-02 21:41 80m -6 / - DK80NDS - / - 3 Partial capture
11-02 21:33 80m - / - DL3MIB +14 / - 7 Partial capture
11-02 21:32 80m - / -17 MD0CCE +11 / - 2 Partial capture
11-02 21:32 80m - / -21 SV2ROC -6 / - 2 ✓ Closing fragment
11-01 20:26 160m - / -25 SM0CXS 0 / - 5 ✓ Closing fragment
11-01 20:17 160m - / -20 SM0CXS +1 / - 3 Partial capture
10-29 18:18 80m - / -15 R7HL -8 / - 2 ✓ Closing fragment
10-29 18:15 80m - / -13 R3BDQ +2 / - 2 ✓ Closing fragment
10-28 21:31 80m -22 / -19 CR7BRV -5 / -15 6 ✓ Full exchange observed
10-27 21:05 80m -18 / - IS0LAY - / - 3 Partial capture
10-27 20:58 80m -17 / - IS0LAY - / - 4 Partial capture
10-27 20:31 80m -16 / -10 LX2A +4 / -23 4 ✓ Full exchange observed
10-27 20:23 80m - / - IW0RLC +8 / - 5 Partial capture
10-27 19:48 80m - / -6 DJ7M +13 / - 2 ✓ Closing fragment
10-25 20:24 80m - / - RA3LCX +8 / - 2 Partial capture
10-24 21:36 80m -14 / - TA1MB - / - 4 Partial capture
10-24 21:01 80m - / - RU3T +9 / - 2 Partial capture
10-24 20:34 80m -8 / -7 IZ8ESX -2 / -11 6 ✓ Full exchange observed
10-24 20:25 80m - / - OM2WQ -5 / - 2 Partial capture
10-22 21:05 80m - / - RA3BQ +8 / - 2 Partial capture
10-18 21:36 80m -24 / - R2EA/P - / - 2 Partial capture
10-18 21:36 80m - / - ON4CMT 0 / - 2 Partial capture
10-18 21:35 80m - / - ON6JN +2 / - 3 Partial capture
10-18 21:33 80m -20 / -16 F4EWK -12 / -15 5 ✓ Full exchange observed
10-18 21:29 80m -15 / -22 DK9PH +7 / - 3 ✓ Closing observed
10-18 21:24 80m -12 / -13 F1ULQ 0 / -15 6 ✓ Full exchange observed
10-18 21:17 80m -9 / -25 SM7TZK +10 / - 5 Partial capture
10-17 21:08 80m - / -13 SV8OVJ +3 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
213230 -13  306  EA8UP JH4JNG 73
213300 -12  306  CT7BRV JH4JNG PM75
213315 +13  248  JH4JNG DG5RN JN59
213330  -9  306  CT7BRV JH4JNG PM75
213400  -7  306  TA7MMI JH4JNG PM75 (x2)
213445 +10  248  JH4JNG DG5RN JN59
213630 -15 2603  TA7MMI JH4JNG PM75
213715  +2 2603  JH4JNG IZ1AJJ JN44 (x2)
210500  -8 1571  JH4JNG S57MPU JN76
213300 -10 1798  JH4JNG HB3YFC -13 (x2)
200215  -8  303  EG1PR JH4JNG PM75 (x2)
10m 
UTC    dB Audio  Message
085730  +4  816  JH4JNG EG1PR +00
085800  +8  816  JH4JNG RR73; DO8JB <...> +00
090030  +7 2130  JH4JNG EA4FQO -17 (x3)
160m 
UTC    dB Audio  Message
163945  +3 2523  JH4JNG OH1MLZ -25 (x4)
173315 +12  691  JH4JNG SP4LVG -17 (x3)
201715  +1 2235  JH4JNG SM0CXS -20 (x8)

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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