KJ5PTH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EL39

Receiver-side FT8 activity involving KJ5PTH, decoded by SO8OO in southeastern Poland. 68 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 13 UTC dates in the available aggregate history. Observed between 2026-06-07 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 68 FT8 messages attributed to KJ5PTH as the transmitting token by decoded message structure across 13 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (99%), followed by 40 m (1%). Most decodes (100%) fell within the six-hour window 00:00-06:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (71%); the estimated median was -13 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

40m · 1 20m · 67

First attributed message: 2026-06-07
Last attributed message: 2026-09-19 03:24 UTC

Observed FT8 message patterns

Attributed sample: 68 messages
Active dates: 13 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -17 to -9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 48, 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 KJ5PTH in decoded directed-looking exchanges:

F1PBZ · France ×2 F4NGR · France ×2 F5MOO · France ×2 IC8TEM · Italy ×2 IK4LZH · Italy ×2 IT9CCB · Sicily ×2 IU1TKT · Italy ×2 IW1DQS · Italy ×2 KB3Z · United States ×2 LZ3CB · Bulgaria ×2 PA3EVY · Netherlands ×2 R7DX · European Russia ×2

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 KJ5PTH

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: EL39 · 47 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 9,100 km (approx.)
Last such locator decoded: 2026-09-19 03:24 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	KJ5PTH S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 06:47	40m	- / -22	F1NQP	-3 / -	4	Partial capture
09-21 06:43	40m	- / -	ON5RZ	-9 / -	5	Partial capture
09-21 06:38	40m	- / -16	F4CQS	-7 / -	5	✓ Closing fragment
09-21 06:35	40m	- / -	ON5RZ	-10 / -	8	Partial capture
09-21 06:18	40m	- / -	F1PSX	-17 / -	2	Partial capture
09-21 06:05	40m	- / -13	F4CQS	-6 / -	2	Partial capture
09-21 05:53	40m	- / -21	EA5SW	-11 / -	3	✓ Closing fragment
09-21 05:28	40m	- / -	DA0O	+1 / -	3	Partial capture
09-21 05:22	40m	- / -19	F4CQS	-3 / -	2	Partial capture
09-21 05:22	40m	- / -	PA4GDR	-2 / -	2	✓ Closing fragment
09-20 06:28	40m	- / -	PD7LJ	-8 / -	11	Partial capture
09-20 06:26	40m	- / -	DD2MON	-4 / -	2	Partial capture
09-20 06:22	40m	- / -	S59AT	+5 / -	3	Partial capture
09-20 05:21	40m	- / -	PD7LJ	-9 / -	2	Partial capture
09-20 05:11	40m	- / -25	OM3PC	-8 / -	2	Partial capture
09-20 05:05	40m	- / -	PD7LJ	-3 / -	5	Partial capture
09-20 05:00	40m	- / -	IK0QDM	-2 / -	3	Partial capture
09-20 04:53	40m	- / -15	PF7DKW	+2 / -	2	✓ Closing fragment
09-20 04:44	40m	- / -22	IK0QDM	-5 / -	9	Partial capture
09-20 04:42	40m	- / -	DK3TA	+8 / -	2	Partial capture
09-20 04:38	40m	- / -	DM1YS	0 / -	3	Partial capture
09-20 04:36	40m	- / -	DL1GLO	+8 / -	11	Partial capture
09-20 04:35	40m	- / -	PD7LJ	-6 / -	2	Partial capture
09-20 04:05	40m	- / -22	YO4NF	+6 / -	3	Partial capture
09-20 04:03	40m	- / -	I6PJC	-5 / -	3	Partial capture
09-20 03:55	40m	- / -21	YO4NF	+2 / -	2	Partial capture
09-20 03:53	40m	- / -	F4VTR	-4 / -	3	Partial capture
09-20 03:46	40m	- / -15	UC6D	+10 / -	2	Partial capture
09-20 03:26	40m	- / -15	UC6D	+6 / -	4	✓ Closing fragment
09-20 03:22	40m	- / -	F4VTR	-3 / -	3	Partial capture
09-20 03:19	40m	- / -	DL1UDO	-4 / -	3	Partial capture
09-20 03:19	40m	- / -18	F4CQS	-2 / -	3	Partial capture
09-20 02:47	40m	- / -	TA3NK	-2 / -	7	Partial capture
09-20 02:42	40m	- / -	TA3NK	-12 / -	2	Partial capture
09-20 02:40	40m	- / -14	F4CQS	-5 / -	5	Partial capture
09-19 07:22	40m	- / -	F4VTR	-7 / -	3	Partial capture
09-19 07:07	40m	- / -	DJ7YP	-16 / -	2	Partial capture
09-19 06:44	40m	- / -10	M8FQT	-6 / -	2	Partial capture
09-19 06:11	40m	- / -	DD2MON	+2 / -	2	Partial capture
09-19 06:08	40m	- / -	PD9OH	+3 / -	3	Partial capture
09-19 06:06	40m	- / -	DD2MON	+5 / -	3	Partial capture
09-19 05:56	40m	- / -12	F4EOC	-2 / -	3	✓ Closing fragment
09-19 05:56	40m	- / -	PD9OH	0 / -	4	Partial capture
09-19 05:54	40m	- / -16	F1DXP	-3 / -	3	✓ Closing fragment
09-19 05:52	40m	- / -	F4EOC	0 / -	2	Partial capture
09-19 05:42	40m	- / -22	IK2LHP	-4 / -	2	✓ Closing fragment
09-19 05:29	40m	- / -21	PD0PMF	+1 / -	3	✓ Closing fragment
09-19 05:21	40m	- / -	PE1NMM	-3 / -	7	Partial capture
09-19 05:15	40m	- / -25	HB9RLZ	-6 / -	3	Partial capture
09-19 05:15	40m	- / -	PD9OH	-4 / -	7	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
063945 -12 2323  KJ5PTH ON5RZ JO21
063945  -8  895  KJ5PTH F4CQS -16 (x4)
064345  -9 2683  KJ5PTH ON5RZ JO21 (x5)
064715  -3  928  KJ5PTH F1NQP JN19 (x4)
065445  -9  895  KJ5PTH 2E0FXE IO91

80m

UTC    dB Audio  Message
032545 +21  457  KJ5PTH UR5SW KN28 (x4)
043530 -19  811  KJ5PTH F4VTR JN25

20m

UTC    dB Audio  Message
082815  -4 1627  KJ5PTH DL5MKR RR73
082915  +4  383  KJ5PTH EA1FMJ -11 (x2)
010345 -16 2327  KJ5PTH W4FSO R+05 (x2)
013645 -11  882  KJ5PTH EA8BYO -08 (x2)
052215 -16 1131  KJ5PTH SV8JVM KM27 (x3)
180700  -8  540  KJ5PTH ON6SAT -14 (x2)
210330  -4  622  KJ5PTH EA8Y -13
213700  +5  609  KJ5PTH AA3B -16 (x2)

10m

UTC    dB Audio  Message
214215 -10  527  KJ5PTH CT1FNG -07 (x5)
202630  -4 2559  KJ5PTH CE2SV -23 (x3)

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.

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