KP4EJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Puerto Rico Most frequent locator attributed to this token: FK67

Receiver-side FT8 activity involving KP4EJ, decoded by SO8OO in southeastern Poland. 66 FT8 messages attributed to this token as transmitter, on 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-25 and 2026-08-22.

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 66 FT8 messages attributed to KP4EJ as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 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 -9 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

20m · 66

First attributed message: 2026-07-25
Last attributed message: 2026-08-22 22:16 UTC

Observed FT8 message patterns

Attributed sample: 66 messages
Active dates: 5 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -17 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 22, strong (≥ -8 dB) 33.

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 KP4EJ in decoded directed-looking exchanges:

LU1DG · Argentina ×2 ON6AA · Belgium 9A5E · Croatia DB5HB · Fed. Rep. of Germany DH8OH · Fed. Rep. of Germany EA1D · Spain EA3PV · Spain EC5M · Spain M6WRB · England M8KUG · England OE7MAH · Austria OE8DDX · Austria

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 KP4EJ

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: FK67 · 20 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,443 km (approx.)
Last such locator decoded: 2026-08-22 22:08 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	KP4EJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-22 22:16	20m	- / -	RA3ZH	+2 / -	5	Partial capture
08-22 22:15	20m	- / -	W2BCC	-11 / -	2	Partial capture
08-22 22:13	20m	- / -	LZ4VR	-9 / -	3	Partial capture
08-22 22:11	20m	-6 / -	DH8OH	- / -10	4	✓ Closing fragment
08-22 22:10	20m	-6 / -	M8KUG	- / -8	3	✓ Closing fragment
08-22 22:06	20m	-7 / -	M7JVT	- / +1	5	Partial capture
08-20 23:29	20m	+6 / -	SV1JFL	- / -11	2	✓ Closing fragment
08-20 23:28	20m	+4 / -	M6WRB	- / -5	3	✓ Closing fragment
08-20 23:24	20m	0 / -	LU1DG	- / -24	5	✓ Closing fragment
08-20 23:21	20m	-3 / -	M6WRB	- / -8	5	✓ Closing fragment
08-20 23:20	20m	-2 / -	OZ4TX	- / -10	3	✓ Closing fragment
08-05 23:28	20m	- / +5	ON3KJU	-15 / -	2	Partial capture
08-01 23:50	20m	- / -13	CT7AUT	-13 / -	3	Partial capture
07-28 00:25	20m	-13 / -	EI9KF	- / -	3	Partial capture
07-26 23:46	20m	- / -	9A60CBM	-10 / -	3	Partial capture
07-26 23:46	20m	-20 / -5	EC5M	-10 / +8	6	✓ Full exchange observed
07-26 23:43	20m	-12 / -	OE8DDX	- / 0	3	✓ Closing fragment
07-26 23:42	20m	-14 / -	EA3PV	- / -5	3	✓ Closing fragment
07-25 23:41	20m	-14 / -	EW2ZC	- / -	2	Partial capture
07-25 23:38	20m	-10 / -	HA9GKL	- / -11	2	Partial capture
07-25 23:36	20m	-16 / -	9A5E	- / 0	2	✓ Closing fragment
07-25 23:34	20m	-16 / -	EA1D	- / +9	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
221245  -5 1283  DH8OH KP4EJ R-10
221315  -7 1283  M8KUG KP4EJ RR73
221330 -10 1393  KP4EJ LZ4VR KN13
221345  -3 1283  DH8OH KP4EJ 73
221400  -8 1393  KP4EJ LZ4VR KN13
221530 -11 2548  KP4EJ W2BCC FN21
221530  -9 1393  KP4EJ LZ4VR KN13
221545  -8 1283  OE7MAH KP4EJ 73
221600 -11 2548  KP4EJ W2BCC FN21
221600  +3  424  KP4EJ RA3ZH KO81
221615  -6 1283  IU5HIU KP4EJ -12
221630  +6  424  KP4EJ RA3ZH KO81 (x4)

10m

UTC    dB Audio  Message
194215 -23 1498  KP4EJ ON6AA JO11 (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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee