KD9YOO — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM69

Receiver-side FT8 activity involving KD9YOO, decoded by SO8OO in southeastern Poland. 8 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-08-26.

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 8 FT8 messages attributed to KD9YOO as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (63%), followed by 20 m (38%). In this small sample, the estimated median decoder S/N was -17 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

80m · 5 20m · 3

First attributed message: 2026-06-11
Last attributed message: 2026-08-26 22:39 UTC

Observed FT8 message patterns

Attributed sample: 8 messages
Active dates: 4 UTC dates
Estimated median S/N: -17 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 2.

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 KD9YOO in decoded directed-looking exchanges:

AA1K · United States F1PBZ · France K4RUM · United States PD0IFI · Netherlands DL8MKG · Fed. Rep. of Germany HB9CXZ · Switzerland HC1BI · Ecuador NI5V · United States SV3DCX · Greece TJ1GD/P · Cameroon

Most frequent locator attributed to KD9YOO

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: EM69 · 6 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,886 km (approx.)
Last such locator decoded: 2026-08-13 03:20 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	KD9YOO S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-15 04:09	80m	- / -	PA3KUS	-5 / -	6	Partial capture
09-12 02:48	40m	- / +1	CT2HEX	-21 / -	2	Partial capture
08-18 02:24	80m	- / -23	HB9CXZ	+5 / -	2	✓ Closing fragment
08-17 00:20	80m	- / -	TF4M	-21 / -	7	Partial capture
08-13 03:17	80m	- / -17	HC1BI	-24 / -	2	✓ Closing fragment
08-13 03:03	80m	- / -21	SV3DCX	+14 / -	4	✓ Closing fragment
08-13 02:41	80m	- / -13	DL8MKG	+22 / -	2	✓ Closing fragment
08-06 01:25	40m	- / -	DL1UDO	-8 / -	3	Partial capture
08-06 01:21	40m	- / -13	PD0IFI	-4 / -	3	✓ Closing fragment
08-05 22:49	20m	- / -15	F1PBZ	-5 / -	2	✓ Closing fragment
08-02 01:21	40m	- / -	F5RRS	-13 / -	4	Partial capture
07-26 04:14	40m	- / -	SP1ZMO	-8 / -	3	Partial capture
07-14 00:37	80m	- / +4	TJ1GD/P	-17 / -	2	✓ Closing fragment
07-05 01:37	80m	- / -18	EC5M	+1 / -	7	Partial capture
07-03 02:50	80m	- / -17	DK7ZT	+7 / -	3	Partial capture
06-26 03:18	40m	- / -22	IU1LCK	-16 / -	3	Partial capture
06-26 03:12	80m	- / -15	II9RICT	-5 / -	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
002100 -21 2401  KD9YOO TF4M HP85 (x6)
022400  +6 2146  KD9YOO HB9CXZ -23 (x2)
042130  -8 2655  KD9YOO IK6DLK JN63
040915  +5  959  KD9YOO PA3KUS JO21 (x6)

160m

UTC    dB Audio  Message
031700  -6  295  KD9YOO AA1K RR73

40m

UTC    dB Audio  Message
041530  -9 1540  KD9YOO SP1ZMO JO73 (x2)
012130 -18 2007  KD9YOO F5RRS JN36 (x4)
005315 -13 1168  KD9YOO HB10GBT -21
012115  -2 2382  KD9YOO PD0IFI JO32 (x3)
012545  -7  711  KD9YOO DL1UDO JO31 (x3)
024845 -22 1468  KD9YOO CT2HEX R+01 (x2)

20m

UTC    dB Audio  Message
020900  +2  302  KD9YOO TK5K -06
224915  -4 2522  KD9YOO F1PBZ -15 (x2)
223945  -9 3031  RI1FJL KD9YOO R-10

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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