K4MD — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM95

Receiver-side FT8 activity involving K4MD, decoded by SO8OO in southeastern Poland. 100 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-25 and 2026-08-29.

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 100 FT8 messages attributed to K4MD 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 (87%), followed by 80 m (12%) and 40 m (1%). Most decodes (100%) fell within the six-hour window 21:00-03:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

100

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

80m · 12 40m · 1 20m · 87

First attributed message: 2026-07-25
Last attributed message: 2026-08-29 02:02 UTC

Observed FT8 message patterns

Attributed sample: 100 messages
Active dates: 5 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -20 to -9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 43, moderate (-15 to -9 dB) 48, strong (≥ -8 dB) 9.

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 K4MD in decoded directed-looking exchanges:

A61DD · United Arab Emirates ×2 4X1UF · Israel 9K2OK · Kuwait A41KB · Oman CN8NS · Morocco DL3MIB · Fed. Rep. of Germany EA5BLP · Spain EI9KF · Ireland F5RRS · France GJ0KYZ · Jersey HA9GKL · Hungary IU0VOG · 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 K4MD

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: EM95 · 38 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,876 km (approx.)
Last such locator decoded: 2026-08-29 01:38 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	K4MD S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-03 08:21	40m	- / -1	DK7ZT	-16 / -	2	Partial capture
09-03 08:11	40m	- / +2	DK7ZT	-15 / -	4	Partial capture
09-03 08:05	40m	- / -2	DK7ZT	-15 / -	3	Partial capture
09-03 07:57	40m	- / -12	DK7ZT	-13 / -	2	Partial capture
08-29 01:51	80m	-14 / -	VA3QBR	- / -11	2	✓ Closing fragment
08-29 01:36	80m	-14 / -	EA8CVR	- / -	4	Partial capture
08-29 01:33	80m	- / -	DO1BRD	+5 / -	2	Partial capture
08-29 01:31	80m	-14 / -5	SV8JE	+2 / -15	7	✓ Full exchange observed
08-29 01:29	80m	-16 / -8	IQ4JO	+4 / -	3	Partial capture
08-29 01:28	80m	- / -14	IU8CNE	-4 / -	2	Partial capture
08-29 01:26	80m	- / -	DO1BRD	+1 / -	3	Partial capture
08-29 01:17	80m	- / -	IK5CHL	+2 / -	3	Partial capture
08-20 02:28	20m	- / -15	UN0GY	-7 / -	3	✓ Closing fragment
08-20 02:28	20m	- / -	YO3GNF	-4 / -	10	Partial capture
08-14 23:01	20m	- / -6	S56KO	-22 / -	5	Partial capture
08-11 20:22	20m	- / -15	SP6AXW	-10 / -	6	Partial capture
08-11 20:17	20m	- / -11	HB9TIH	-6 / -	9	Partial capture
08-11 20:15	20m	- / -	IU5HIU	0 / -	2	Partial capture
08-11 20:15	20m	- / -8	OK4SD	0 / -	4	✓ Closing fragment
08-01 10:48	20m	- / -13	GJ0KYZ	-10 / -	2	✓ Closing fragment
07-31 21:32	20m	-13 / -	E79AI	- / -11	5	Partial capture
07-31 21:25	20m	- / -13	EA5BLP	+1 / -	4	✓ Closing fragment
07-31 21:25	20m	- / -5	F4MUD	-8 / -	9	Partial capture
07-31 21:17	20m	- / -13	9K2OK	-15 / -	2	✓ Closing fragment
07-31 21:16	20m	- / -	M8KUG	-13 / -	7	Partial capture
07-31 21:14	20m	-16 / -	DL3MIB	- / -6	2	✓ Closing fragment
07-31 21:12	20m	-18 / -	SP8TN	- / -8	2	✓ Closing fragment
07-31 21:08	20m	-18 / -18	SV5BYP	-6 / -	3	✓ Closing observed
07-31 20:27	20m	- / -	M1DOZ	+5 / -	8	Partial capture
07-31 20:17	20m	- / -	2E0FUM	-16 / -	2	Partial capture
07-31 20:09	20m	- / -	F5JQF	-3 / -	6	Partial capture
07-30 11:21	20m	- / -	SP4GDW	-10 / -	4	Partial capture
07-30 11:01	20m	- / -13	SQ1EUJ	-10 / -	3	✓ Closing fragment
07-30 11:00	20m	- / -	R6LQU	-11 / -	2	✓ Closing fragment
07-30 10:56	20m	- / -8	F5RRS	-12 / -	6	✓ Closing fragment
07-30 10:52	20m	- / -	DK5UP	-4 / -	7	Partial capture
07-30 09:35	20m	- / -	PD1ADA	-15 / -	6	Partial capture
07-28 02:47	20m	-20 / -	Z33F	- / -	2	✓ Closing fragment
07-28 02:19	20m	-13 / -	A61DD	- / +1	3	✓ Closing fragment
07-28 02:14	20m	-8 / -	Z33F	- / -	4	Partial capture
07-28 02:11	20m	-22 / -	OH2ZZ	- / +7	3	✓ Closing fragment
07-28 02:02	20m	-10 / -	RK6J	- / -10	5	✓ Closing fragment
07-28 01:59	20m	-5 / -	HA9GKL	- / -	2	✓ Closing fragment
07-28 01:56	20m	-20 / -	EX8ABR	- / -	6	Partial capture
07-28 01:50	20m	-14 / -	A61DD	- / +4	6	✓ Closing fragment
07-28 01:49	20m	-18 / -	LZ1ZF	- / -4	2	Partial capture
07-28 01:46	20m	-10 / -	LA1HW	- / -15	3	✓ Closing fragment
07-28 01:22	20m	-12 / -	YL2KF	- / -13	2	✓ Closing fragment
07-28 01:18	20m	-17 / -	RA6MQ	- / +8	3	✓ Closing fragment
07-28 01:11	20m	-19 / -	IT9CMZ	- / -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
004530  -9 2378  K4MD PE1NPS JO22 (x3)
075700 -11 1907  K4MD DK7ZT -12 (x9)
081645 -10  404  K4MD DJ0MAB JN49
082115 -17 1906  K4MD DK7ZT -01 (x2)

80m

UTC    dB Audio  Message
013215 -10 2517  IQ4JO K4MD R-22
013230  +4  231  K4MD SV8JE KM08 (x2)
013300  +6 1115  K4MD DO1BRD JO30 (x2)
013415 -14 2517  SV8JE K4MD -15
013430  +3  231  K4MD SV8JE R-05 (x2)
013600  -8 2593  EA8CVR K4MD EM95 (x4)
015130 -13  454  VA3QBR K4MD R-11 (x2)
020215 -22 1400  KD5NSK K4MD R-15

20m

UTC    dB Audio  Message
230700 -24 1908  K4MD S56KO RRR
021100 -16 2211  K4MD CN8NS RR73
022815  -4 1354  K4MD YO3GNF KN34 (x2)
022845 -11 2734  K4MD UN0GY -15
022915  -4 1697  K4MD YO3GNF KN34
022915  -7 2735  K4MD UN0GY -15
022945  -3 1697  K4MD YO3GNF KN34
022945  -3 2735  K4MD UN0GY RR73
023015  -4 1696  K4MD YO3GNF KN34 (x6)

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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