OK3MB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Czech Republic Most frequent locator attributed to this token: JO70

Receiver-side FT8 activity involving OK3MB, decoded by SO8OO in southeastern Poland. 1,486 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 15 UTC dates in the available aggregate history. Observed between 2026-08-20 and 2026-09-21.

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 1,486 FT8 messages attributed to OK3MB as the transmitting token by decoded message structure across 15 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (85%), followed by 20 m (15%). Most decodes (73%) fell within the six-hour window 08:00-14:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

1,486

Messages attributed

UTC dates decoded

Active 15-min windows

-10 dB

Estimated median S/N

Bands

40m · 1,269 20m · 217

First attributed message: 2026-08-20
Last attributed message: 2026-09-21 18:21 UTC

Observed FT8 message patterns

Attributed sample: 1,486 messages
Active dates: 15 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -18 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 317, moderate (-15 to -9 dB) 546, strong (≥ -8 dB) 623.

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 OK3MB in decoded directed-looking exchanges:

F1ICS · France ×2 F1MXE · France ×2 F1PBZ · France ×2 OZ9FF · Denmark ×2 RA3DFQ · European Russia ×2 RA3Y · European Russia ×2 DF2HZ · Fed. Rep. of Germany ×2 DL9KV · Fed. Rep. of Germany ×2 F1TXI · France ×2 GW0ARK · Wales ×2 M0BEW · England ×2 PD7JLP · Netherlands ×2

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 OK3MB

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: JO70 · 931 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 487 km (approx.)
Last such locator decoded: 2026-09-21 18:21 UTC

Other locator fields attributed to this token: JN65 (2).

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	OK3MB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 18:19	40m	-2 / -	IU8RFW	- / +1	2	Partial capture
09-21 18:19	40m	+2 / -9	UC6D	+12 / -	3	✓ Closing observed
09-21 18:17	40m	-1 / -9	SP9DOU	-15 / +10	4	✓ Full exchange observed
09-21 18:15	40m	-4 / -	DL6ZOG	- / +9	2	Partial capture
09-21 18:14	40m	+2 / -	OE8PIT	- / -	2	Partial capture
09-21 18:14	40m	+5 / +2	OK1FED	0 / -	5	✓ Closing observed
09-21 18:12	40m	+2 / +1	HA7TM	+19 / -	4	✓ Full exchange observed
09-21 18:10	40m	0 / +4	HB9ELE	+11 / 0	5	✓ Full exchange observed
09-21 18:10	40m	+2 / -18	RL3FA	-4 / -	3	Partial capture
09-21 18:09	40m	+3 / -	DK5NC	- / +4	2	Partial capture
09-21 18:08	40m	+3 / -	PA7FB	- / -4	2	Partial capture
09-21 18:06	40m	+5 / -	EA5DKT	- / -2	2	Partial capture
09-21 18:03	40m	0 / -10	F4IIX	0 / -3	4	✓ Full exchange observed
09-20 13:44	40m	0 / -	MI5JYK	- / -	2	Partial capture
09-20 13:43	40m	+1 / -	DL7ACN	-17 / +4	4	✓ Closing observed
09-20 13:42	40m	-4 / -	PD0XTL	- / -	2	Partial capture
09-20 13:39	40m	-4 / -14	HA8AP	-15 / +5	4	✓ Full exchange observed
09-20 13:38	40m	-4 / 0	F6ECI	-9 / +5	4	✓ Full exchange observed
09-20 13:35	40m	-3 / -	G5ACE/P	- / -	2	Partial capture
09-20 13:32	40m	+2 / +10	DL1FAM	-2 / +5	5	✓ Full exchange observed
09-20 13:30	40m	+1 / -10	R2YW	-3 / -13	7	✓ Full exchange observed
09-20 13:29	40m	+2 / -	DB9JH	- / -	2	Partial capture
09-20 13:28	40m	+2 / -	DG9XN	- / +4	3	✓ Closing fragment
09-20 13:25	40m	0 / -	YT4ZZ/P	- / -	2	Partial capture
09-20 13:23	40m	0 / -9	HA8LD	-9 / +9	5	✓ Full exchange observed
09-20 13:22	40m	+1 / -16	DL3LBK	-9 / +5	4	✓ Full exchange observed
09-20 13:21	40m	+2 / -	PD1HD	- / -	2	Partial capture
09-20 13:20	40m	-1 / +2	PD0IFI	-3 / +7	6	✓ Full exchange observed
09-20 13:19	40m	-1 / -	OZ5KAJ	- / -	2	Partial capture
09-20 13:18	40m	0 / -	DF2JK	- / -	2	Partial capture
09-20 13:15	40m	+2 / -	G7LHK	- / -	2	Partial capture
09-20 13:15	40m	+1 / -	IN3JRZ	-15 / +9	5	✓ Closing observed
09-20 13:13	40m	0 / -	PE1RSY	- / +1	3	✓ Closing fragment
09-20 13:10	40m	+4 / -4	DL9KM	-6 / +3	7	✓ Full exchange observed
09-20 13:10	40m	+3 / +1	SP9AMH	-5 / -	4	✓ Full exchange observed
09-20 13:09	40m	0 / -8	SP4LO	-12 / +4	5	✓ Full exchange observed
09-20 13:08	40m	+1 / -12	OK1UVJ	-18 / -4	3	✓ Full exchange observed
09-20 13:07	40m	+2 / -	LA9DJA	- / -	2	Partial capture
09-20 13:05	40m	0 / -	PA3EOZ	- / -	2	Partial capture
09-20 13:00	40m	-2 / +2	DL4NWM	-1 / -	5	✓ Full exchange observed
09-20 12:59	40m	+2 / -	IN3JRZ	- / -	2	Partial capture
09-20 12:58	40m	-1 / -	G7LHK	- / -	2	Partial capture
09-20 12:56	40m	-1 / -	DF1PI	- / -	2	Partial capture
09-20 12:55	40m	-2 / -	PG9S	- / -	2	Partial capture
09-20 12:54	40m	0 / -	GW6OHV	- / -	2	Partial capture
09-20 12:52	40m	+2 / -	RA3LJ	- / -	2	Partial capture
09-20 12:49	40m	-2 / -6	SP3DVO	-12 / +10	8	✓ Full exchange observed
09-20 12:47	40m	-2 / -5	PF7DKW	-6 / -	5	✓ Full exchange observed
09-20 12:45	40m	+4 / -	DL1ASL	- / +1	3	✓ Closing fragment
09-20 12:44	40m	-5 / -	F4JDD	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
181630  -6 2755  HA7TM OK3MB RR73
181645  -2 1024  OK3MB OK1FED +02
181700  -5 2755  UT0IN OK3MB JO70
181715  +1 1024  OK3MB OK1FED +02
181730  -4 2755  SP9DOU OK3MB JO70
181745 -15 2518  OK3MB SP9DOU -09
181800  -2 2755  SP9DOU OK3MB R+10 (x2)
181900  +2 2755  UC6D OK3MB JO70
181915 +11 2756  OK3MB UC6D -09
181930  +2 2755  IU8RFW OK3MB +01
181945 +13 2755  OK3MB UC6D RR73
182000  -7 2755  IU8RFW OK3MB +01
182030  +4 2755  UA3SCU OK3MB JO70
182100  -1 2755  ON3WZ OK3MB JO70

20m

UTC    dB Audio  Message
130830  -2 1574  CQ OK3MB JO70 (x2)
130930 -10 1573  M8IRI OK3MB JO70
131030  -9 1573  CQ OK3MB JO70
133445 -11 1237  OK3MB RA9CUU -17 (x5)
134845  -8 1568  OK3MB G1LQT IO70
143015 -12  769  OK3MB OH3MB KP20
150145  -1 1839  OK3MB M9UTD -15 (x2)
152245 -10 2021  OK3MB G3ROY -10 (x2)

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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