JA0KJD — 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: PM85

Receiver-side FT8 activity involving JA0KJD, decoded by SO8OO in southeastern Poland. 10 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-03 and 2026-09-19.

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 10 FT8 messages attributed to JA0KJD as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -16 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-16 dB

Estimated median S/N

Bands

40m · 10

First attributed message: 2026-09-03
Last attributed message: 2026-09-19 20:52 UTC

Observed FT8 message patterns

Attributed sample: 10 messages
Active dates: 2 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) 5, moderate (-15 to -9 dB) 5, 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 JA0KJD in decoded directed-looking exchanges:

CN8NS · Morocco F5NBU · France HA1BF · Hungary LB7ZG · Norway LZ4VR · Bulgaria OM3PR · Slovak Republic S57BTI · Slovenia HA1TNX · Hungary LX1JH · Luxembourg OH8WW · Finland UX1AA · Ukraine

Most frequent locator attributed to JA0KJD

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: PM85 · 4 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,586 km (approx.)
Last such locator decoded: 2026-09-19 20:42 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	JA0KJD S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-07 21:09	40m	- / -	DL1API	0 / -	2	Partial capture
10-07 21:08	40m	- / -4	HA1BF	-20 / -	2	✓ Closing fragment
10-07 20:52	80m	- / -19	HA1TNX	+14 / -	2	✓ Closing fragment
10-04 20:32	80m	- / -18	R6YY	-3 / -	4	Partial capture
09-25 20:43	80m	- / -	RY7F	-8 / -	5	Partial capture
09-25 20:42	80m	- / -7	UX1AA	-4 / -	6	✓ Closing fragment
09-22 20:26	80m	- / -13	LX1JH	+23 / -	2	✓ Closing fragment
09-19 20:51	40m	-21 / -	OM3PR	- / -19	2	✓ Closing fragment
09-19 20:51	40m	- / -13	DK7ZT	-4 / -	2	Partial capture
09-19 20:50	40m	- / -	DJ0MAB	+8 / -	3	Partial capture
09-19 20:47	40m	- / -12	F5NBU	+9 / -	3	✓ Closing fragment
09-19 20:42	40m	-14 / -21	CN8NS	-10 / -	3	✓ Closing observed
09-08 19:27	80m	- / -	PI4DX	+9 / -	2	Partial capture
09-04 20:21	40m	- / -18	RJ6ON	+5 / -	3	Partial capture
09-03 20:34	40m	-16 / -	CN8NS	- / -	2	Partial capture
09-03 20:32	40m	- / -12	RA4HG	-2 / -	2	Partial capture
09-03 20:31	40m	-17 / -15	LB7ZG	+1 / -17	4	✓ Full exchange observed
09-03 20:29	40m	-14 / -10	LZ4VR	-8 / -18	6	✓ Full exchange observed
09-03 20:28	40m	- / -18	S57BTI	+13 / -	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
204330  -9 2468  JA0KJD RY7F LN04
204400  -7 1518  JA0KJD UX1AA R-07
204400  -7 2468  JA0KJD RY7F LN04
204430  -7 1518  JA0KJD UX1AA 73
204430  -6 2468  JA0KJD RY7F LN04 (x3)
202930  -4  358  JA0KJD R6YY -16 (x5)
205230 +14 2260  JA0KJD HA1TNX -19 (x2)
202115 +11 1092  JA0KJD OH8WW RR73

40m

UTC    dB Audio  Message
204615 -19 2419  BH4GWF JA0KJD -10
204730 +11 2419  JA0KJD F5NBU JN28 (x3)
205030 +12 2420  JA0KJD DJ0MAB JN49
205100  -6 1906  JA0KJD DK7ZT -13
205100 +10 2420  JA0KJD DJ0MAB JN49
205130  -2 1906  JA0KJD DK7ZT -13
205130  +3 2420  JA0KJD DJ0MAB JN49
205145 -21 2419  OM3PR JA0KJD -19 (x2)
210830 -21 1378  JA0KJD HA1BF -04 (x2)
210930  +0 2642  JA0KJD DL1API JO51 (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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