K4DBC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM80

Receiver-side FT8 activity involving K4DBC, decoded by SO8OO in southeastern Poland. 422 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 25 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-08.

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 422 FT8 messages attributed to K4DBC as the transmitting token by decoded message structure across 25 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (88%), followed by 40 m (12%) and 80 m (0%). 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 -12 dB.

Overview

422

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 2 40m · 49 20m · 371

First attributed message: 2026-06-08
Last attributed message: 2026-09-08 00:26 UTC

Observed FT8 message patterns

Attributed sample: 422 messages
Active dates: 25 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -19 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 117, moderate (-15 to -9 dB) 182, strong (≥ -8 dB) 123.

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 K4DBC in decoded directed-looking exchanges:

4X1UF · Israel 5F3VYZ · Morocco DL1R · Fed. Rep. of Germany DL1UDO · Fed. Rep. of Germany EA3NY · Spain F5HNQ · France F5RAV · France GM7JQK · Scotland IK2LRF · Italy IK8DUA · Italy IT9CCB · Sicily IZ0GRR · Italy

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 K4DBC

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: EM80 · 181 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,418 km (approx.)
Last such locator decoded: 2026-09-08 00:26 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	K4DBC S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 00:22	40m	-17 / -	HJ4AAM	- / -15	5	Partial capture
09-08 00:21	40m	- / -	SV1MOZ	-16 / -	6	Partial capture
09-08 00:19	40m	- / -	R9LE	-12 / -	2	Partial capture
09-08 00:17	40m	-20 / -	9Y4DG	- / -	2	✓ Closing fragment
09-08 00:14	40m	-16 / 0	LZ2KV	+15 / +1	8	✓ Full exchange observed
09-08 00:12	40m	- / -	CT7ARQ	-16 / -	4	Partial capture
09-08 00:12	40m	-19 / -6	IK2XDE	-17 / +4	5	✓ Full exchange observed
09-08 00:10	40m	-15 / -	V51PJ	- / -	2	✓ Closing fragment
09-08 00:09	40m	- / -	LZ2KV	+10 / -	2	Partial capture
09-04 01:56	40m	- / -	TA3NK	+2 / -	11	Partial capture
09-04 01:54	40m	-18 / +1	KD2WBX	-15 / -9	3	✓ Full exchange observed
09-04 01:48	40m	-16 / -	KE2CUR	- / -20	2	✓ Closing fragment
09-04 01:46	40m	- / -12	IZ8EYN	-4 / -	5	Partial capture
09-03 00:13	40m	-19 / -19	2E0ROJ	-13 / -22	10	Partial capture
09-03 00:10	40m	- / -	F4BYA	+6 / -	5	Partial capture
09-03 00:07	40m	-16 / -	TL8GD	- / -	4	Partial capture
09-02 00:22	40m	- / -	F6FHZ	-9 / -	3	Partial capture
09-02 00:17	40m	- / -20	M9PXZ	-22 / -	2	Partial capture
09-02 00:15	40m	- / -	AI4FR	-20 / -	2	✓ Closing fragment
09-02 00:12	80m	- / -10	GM6URC	-12 / -	2	✓ Closing fragment
08-27 00:43	20m	- / -9	IW1GB	0 / -	2	Partial capture
08-27 00:39	20m	-10 / -	R9FF	- / -24	2	✓ Closing fragment
08-27 00:38	20m	-8 / -	W0OVX	- / +1	2	✓ Closing fragment
08-27 00:35	20m	-6 / -	DL1UDO	- / -5	2	✓ Closing fragment
08-25 00:06	40m	- / -	DH5BM	-19 / -	7	Partial capture
08-25 00:05	40m	- / -	EB2EMZ	-15 / -	3	Partial capture
08-25 00:04	40m	- / -	OH1EDK	+9 / -	13	Partial capture
08-25 00:04	40m	- / -	ON4MAP	-13 / -	2	Partial capture
08-25 00:04	40m	- / -	F4BYA	+11 / -	4	Partial capture
08-25 00:02	40m	-17 / -19	DL8HXP	-12 / -13	6	✓ Full exchange observed
08-25 00:02	40m	- / -	UA3DIB	+12 / -	2	Partial capture
08-25 00:01	40m	- / -	DL5CTE	-6 / -	3	Partial capture
08-25 00:00	40m	- / -	F4BYA	+7 / -	4	Partial capture
08-24 23:30	20m	- / -10	IW1GB	-6 / -	2	Partial capture
08-24 23:29	20m	- / -	PH7GD	+6 / -	5	Partial capture
08-24 23:28	20m	-3 / -	IZ0GRR	- / -5	2	✓ Closing fragment
08-24 00:08	20m	- / -	IK2ZJR	0 / -	12	Partial capture
08-24 00:04	20m	-13 / -	LZ2EW	- / -15	3	Partial capture
08-24 00:03	20m	-13 / -	TJ1GD	- / -12	3	Partial capture
08-10 00:20	20m	- / -	SV2AOB	-12 / -	2	Partial capture
08-06 00:20	20m	-12 / -	AF0B	- / +6	2	Partial capture
08-06 00:09	20m	-12 / +7	K1CXS	-9 / -	4	✓ Closing observed
08-03 01:07	80m	- / -	SP9TBT	+11 / -	4	Partial capture
08-03 00:39	40m	- / -	F1IQH	-18 / -	2	Partial capture
07-20 01:02	20m	-18 / -	KJ5HUU	- / -9	13	Partial capture
07-20 00:58	20m	- / -5	EB5DFU	-14 / -	2	Partial capture
07-20 00:53	20m	-18 / -	YU1LD	- / -	2	✓ Closing fragment
07-20 00:52	20m	-22 / -18	R2DN	-17 / -	6	✓ Closing observed
07-19 01:21	20m	-12 / -	OH3JF	- / -	2	Partial capture
07-10 01:26	40m	- / -	DH5BM	-10 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
002030 -20 1286  CQ K4DBC EM80                         a1
002045 -18 1285  K4DBC F1IQH JN27
002100 -18 1285  CQ K4DBC EM80
002115 -15 1286  K4DBC SV1MOZ KM17 (x3)
002230 -19 1285  HJ4AAM K4DBC -15
002245 -17 1286  K4DBC SV1MOZ KM17
002300 -18 1287  HJ4AAM K4DBC -15
002315 -13 1286  K4DBC SV1MOZ KM17
002330 -18 1286  HJ4AAM K4DBC -15
002345 -19 1285  K4DBC SV1MOZ KM17
002400 -14 1286  HJ4AAM K4DBC -15 (x2)
002630 -20 1285  CQ K4DBC EM80

80m

UTC    dB Audio  Message
011915  -8  872  K4DBC DO1OAS -20
011945 +11 2002  K4DBC DO9BAU JO62
011945  -6  872  K4DBC DO1OAS -20
012015 +14 2002  K4DBC DO9BAU JO62
012015  -4  872  K4DBC DO1OAS -20 (x3)
010730  +7 1967  K4DBC SP9TBT JO90 (x4)
001030  -3 2323  K4DBC F5HNQ IN98
001200 -12 1547  K4DBC GM6URC -10 (x2)
002500 -15 2206  K4DBC F5HNQ IN98

20m

UTC    dB Audio  Message
003700  -9 1730  K7EDM K4DBC -13
003800  -8 1730  W0OVX K4DBC +01 (x2)
003900  -7 1729  R9FF K4DBC -24 (x2)
004000  -9 1730  CQ DX K4DBC EM80 (x7)
004315  -2 1730  K4DBC IW1GB -09
004330  -5 1730  CQ DX K4DBC EM80
004415  +1 1730  K4DBC IW1GB -09

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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