JH0RNN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM97

Receiver-side FT8 activity involving JH0RNN, decoded by SO8OO in southeastern Poland. 7 FT8 messages attributed to this token as transmitter, on 80m, across 1 UTC dates in the available aggregate history. Last observed 2026-08-21.

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 7 FT8 messages attributed to JH0RNN as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). In this small sample, the estimated median decoder S/N was -19 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-19 dB

Estimated median S/N

Bands

80m · 7

First attributed message: 2026-08-21
Last attributed message: 2026-08-21 19:59 UTC

Observed FT8 message patterns

Attributed sample: 7 messages
Active dates: 1 UTC dates
Estimated median S/N: -19 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 0.

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 JH0RNN in decoded directed-looking exchanges:

EA6Y · Balearic Islands LY3KI · Lithuania OH4MDY · Finland RT6Z · European Russia S51DI · Slovenia S59A · Slovenia UN8DSW · Kazakhstan UX1AA · Ukraine

Most frequent locator attributed to JH0RNN

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: PM97 · 7 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,513 km (approx.)
Last such locator decoded: 2026-08-21 19:59 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	JH0RNN S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 20:26	80m	- / -12	EA6Y	+12 / -	3	✓ Closing fragment
09-20 20:19	80m	- / -11	LY3KI	+14 / -	2	✓ Closing fragment
09-18 19:57	80m	- / +4	OH4MDY	+4 / -	2	✓ Closing fragment
09-17 20:26	80m	- / -14	RT6Z	+12 / -	4	✓ Closing fragment
09-17 20:25	80m	- / -5	UX1AA	+6 / -	4	✓ Closing fragment
09-13 20:27	80m	- / -16	S51DI	+10 / -	2	✓ Closing fragment
09-13 20:20	80m	- / -13	S59A	+23 / -	2	✓ Closing fragment
09-08 20:56	40m	- / -15	LZ4VR	-5 / -	5	Partial capture
09-07 20:34	80m	- / -13	DJ7M	+12 / -	2	Partial capture
09-05 20:15	80m	- / -	OH4BW	+8 / -	2	Partial capture
09-05 20:14	80m	- / -20	OK2BUZ	+28 / -	4	Partial capture
09-05 20:14	80m	- / -20	OZ7KJ/P	+5 / -	4	Partial capture
08-21 19:56	80m	- / -14	DL1RWN	+18 / -	3	Partial capture
08-21 19:55	80m	-19 / -	<...>	- / -	7	Partial capture
08-14 20:03	80m	- / -12	UN8DSW	-16 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
202530 +11 2617  JH0RNN UX1AA KO70 (x3)
202630 +13 2868  JH0RNN RT6Z KN98 (x4)
202800  +2 2718  JH0RNN R6CW -16
195730  +3 1025  JH0RNN OH4MDY +04 (x2)
201945 +15 1700  JH0RNN LY3KI -11 (x2)
202615 +13 2342  JH0RNN EA6Y JM19 (x3)

40m

UTC    dB Audio  Message
205630  -7 1342  JH0RNN LZ4VR KN13 (x5)

10m

UTC    dB Audio  Message
105530 -15  908  JH0RNN EC3SP JN11

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