K5ZD — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EN90

Receiver-side FT8 activity involving K5ZD, decoded by SO8OO in southeastern Poland. 61 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-29 and 2026-09-09.

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 61 FT8 messages attributed to K5ZD as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (98%), followed by 20 m (2%). Several six-hour UTC windows tied for the largest share (98%), 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

40m · 60 20m · 1

First attributed message: 2026-08-29
Last attributed message: 2026-09-09 02:48 UTC

Observed FT8 message patterns

Attributed sample: 61 messages
Active dates: 3 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -18 to -3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 13, moderate (-15 to -9 dB) 18, strong (≥ -8 dB) 30.

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 K5ZD in decoded directed-looking exchanges:

K1SFA · United States SP4TKA · Poland 5N0YEN · Nigeria 9V1YC · Singapore AC9HP · United States AI4FR · United States DJ9FBA · Fed. Rep. of Germany DL9KM · Fed. Rep. of Germany IK6DLK · Italy IW2MYH · Italy MI7XHT · Northern Ireland OH1TSM · Finland

Most frequent locator attributed to K5ZD

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: EN90 · 16 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,464 km (approx.)
Last such locator decoded: 2026-09-09 02:40 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	K5ZD S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-09 02:45	40m	-13 / -	K5LJC	- / -10	2	Partial capture
09-09 02:43	40m	- / -	EA4EWV	-16 / -	4	Partial capture
09-09 02:43	40m	-14 / -	RT6DU	-6 / -10	4	✓ Closing observed
09-09 02:42	40m	-14 / -	ON3ANY	- / -17	2	✓ Closing fragment
09-09 02:41	40m	-18 / -	RA3QM	- / -19	2	Partial capture
09-09 02:41	40m	- / -16	R2BQM	-20 / -	2	Partial capture
09-09 02:38	40m	-19 / -	OH2XO	- / -17	2	✓ Closing fragment
09-09 02:37	40m	- / -14	US1VM	+10 / -	4	Partial capture
09-09 02:37	40m	-16 / -	RV9WF	- / -17	2	✓ Closing fragment
09-09 02:36	40m	-18 / -	SV2SKU	- / -11	2	✓ Closing fragment
09-09 02:34	40m	- / -	UW5ESX	-1 / -	14	Partial capture
09-09 02:33	40m	-18 / -4	RU6CH	-8 / -	4	✓ Closing observed
09-09 02:33	40m	-20 / -	OH1TSM	- / -8	2	✓ Closing fragment
09-09 02:32	40m	-15 / -	AI4FR	- / 0	2	✓ Closing fragment
09-09 02:21	40m	- / -	EA4EWV	-16 / -	2	Partial capture
09-09 02:20	40m	- / -	UW5ESX	-3 / -	12	Partial capture
09-09 02:19	40m	-8 / -	MI7XHT	- / -16	2	✓ Closing fragment
09-09 02:18	40m	-10 / -	IW2MYH	- / -6	2	✓ Closing fragment
09-09 02:17	40m	- / -	RV9WF	-10 / -	2	Partial capture
09-09 02:17	40m	- / -	UR4QWW	-14 / -	5	Partial capture
09-09 02:16	40m	-8 / -	DJ9FBA	- / -6	3	✓ Closing fragment
09-09 02:14	40m	-9 / -	DL9KM	- / -14	2	✓ Closing fragment
09-09 02:12	40m	-6 / -	IH9/IT9JUI	- / -5	2	Partial capture
09-09 02:11	40m	-7 / -	SQ100PKP	- / -6	2	Partial capture
09-07 23:51	40m	-8 / -	TT1GD	- / -	2	Partial capture
09-07 23:48	40m	-8 / -	IK6DLK	- / -16	2	✓ Closing fragment
09-07 23:46	40m	-6 / +9	PV8AJ	-13 / -1	4	✓ Full exchange observed
09-07 23:45	40m	-4 / -	5N0YEN	- / -12	3	✓ Closing fragment
09-07 23:44	40m	- / -	UN7GBX	-11 / -	3	Partial capture
09-07 23:42	40m	-7 / -	TN8GD	- / -	2	✓ Closing fragment
09-07 23:40	40m	- / -6	EA1CQ	-4 / -	2	Partial capture
09-07 23:39	40m	-4 / -	9V1YC	- / -17	2	✓ Closing fragment
09-07 23:37	40m	-4 / -	IH9/IT9JUI	- / +6	2	Partial capture
09-07 23:36	40m	-4 / -	5N0YEN	- / -	2	Partial capture
09-07 23:34	40m	-3 / -	A61DD	- / -	2	Partial capture
09-07 23:22	40m	- / -	IU8RFW	+4 / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
024145 -17 1412  K5ZD R2BQM -16
024200 -15 1412  RA3QM K5ZD -19
024230 -16 1412  ON3ANY K5ZD R-17 (x2)
024315  -7  655  K5ZD RT6DU KN94
024330 -13 1412  RT6DU K5ZD -10
024345 -18 1412  K5ZD EA4EWV IN80
024400 -15 1412  RT6DU K5ZD RR73
024415  -6  655  K5ZD RT6DU 73
024415 -16 1412  K5ZD EA4EWV IN80 (x2)
024500 -12 1412  K5LJC K5ZD -10
024515 -15 1409  K5ZD EA4EWV IN80
024530 -14 1412  K5LJC K5ZD -10
024830 -10 1412  OH7OBJ K5ZD -14

160m

UTC    dB Audio  Message
025330 -20 1809  K5ZD K1SFA 73

20m

UTC    dB Audio  Message
165515 -16 1235  SP4TKA K5ZD RR73

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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