WA4YJY — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EL99

Receiver-side FT8 activity involving WA4YJY, decoded by SO8OO in southeastern Poland. 12 FT8 messages attributed to this token as transmitter, on 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-06-17.

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 12 FT8 messages attributed to WA4YJY as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -18 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-18 dB

Estimated median S/N

Bands

20m · 12

First attributed message: 2026-06-11
Last attributed message: 2026-06-17 04:43 UTC

Observed FT8 message patterns

Attributed sample: 12 messages
Active dates: 2 UTC dates
Estimated median S/N: -18 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 1, 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 WA4YJY in decoded directed-looking exchanges:

DH9DR · Fed. Rep. of Germany F1PSX · France G5KUE · England M0MLS · England HB9EFK · Switzerland TM2WWA · France F5NBU · France F5PRH · France G4IRN · England ON3ANY · Belgium

Most frequent locator attributed to WA4YJY

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: EL99
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,379 km (approx.)
Last such locator decoded: 2026-06-11 01:46 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	WA4YJY S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-17 06:16	80m	- / -16	G4IRN	-16 / -	2	✓ Closing fragment
09-17 05:52	80m	- / -16	F5NBU	-9 / -	3	✓ Closing fragment
09-17 05:44	40m	- / -	OE9DAI	-1 / -	26	Partial capture
09-17 05:37	40m	- / -	PD0WL	-15 / -	3	Partial capture
09-16 01:54	40m	- / -21	GM6URC	-17 / -	3	Partial capture
08-06 04:59	40m	- / -12	HB9EFK	-2 / -	2	✓ Closing fragment
08-02 04:59	20m	- / -20	HZ1TT	-12 / -	2	Partial capture
07-29 07:28	20m	- / +3	M0MLS	-14 / -	2	✓ Closing fragment
07-23 07:52	20m	- / -17	DH9DR	-15 / -	4	✓ Closing fragment
07-23 07:43	20m	- / -25	G5KUE	-2 / -	5	✓ Closing fragment
07-23 07:43	20m	- / -16	F1PSX	-10 / -	3	✓ Closing fragment
07-18 06:14	20m	- / -6	DL8WEM	-10 / -	2	Partial capture
07-06 03:58	80m	- / -10	F5PRH	-6 / -	2	✓ Closing fragment
07-06 03:53	80m	- / -10	ON3ANY	-3 / -	6	✓ Closing fragment
07-06 03:46	80m	- / -	EA5HM	-13 / -	4	Partial capture
07-05 04:13	40m	- / -	DJ0MAB	-3 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
034745 -13 1312  WA4YJY EA5HM IM99 (x2)
035315  +2 1043  WA4YJY ON3ANY -10 (x6)
035815  -7  998  WA4YJY F5PRH -10 (x2)
055215  -9  904  WA4YJY F5NBU JN28 (x3)
061615 -15 1169  WA4YJY G4IRN -16 (x2)

40m

UTC    dB Audio  Message
055130  +0 2180  WA4YJY OE9DAI JN47 (x15)

20m

UTC    dB Audio  Message
074330  -8 2825  WA4YJY G5KUE IO90
074330 -10 1179  WA4YJY F1PSX R-16
074400  +2 2825  WA4YJY G5KUE IO90
074400  -8 1179  WA4YJY F1PSX 73
074430  +6 2824  WA4YJY G5KUE IO90 (x3)
075200 -16 1495  WA4YJY DH9DR JO31 (x4)
072815 -10 1915  WA4YJY M0MLS +03 (x2)
045945 -12 1760  WA4YJY HZ1TT -20 (x2)

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