OH3MB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Finland Most frequent locator attributed to this token: KP20

Receiver-side FT8 activity involving OH3MB, decoded by SO8OO in southeastern Poland. 1,447 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 53 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-20.

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 1,447 FT8 messages attributed to OH3MB as the transmitting token by decoded message structure across 53 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (54%), followed by 20 m (41%) and 60 m (3%). Most decodes (55%) fell within the six-hour window 13:00-19:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

1,447

Messages attributed

UTC dates decoded

293

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 18 60m · 45 40m · 786 20m · 598

First attributed message: 2026-06-06
Last attributed message: 2026-09-20 14:03 UTC

Observed FT8 message patterns

Attributed sample: 1,447 messages
Active dates: 53 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -20 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 426, moderate (-15 to -9 dB) 516, strong (≥ -8 dB) 505.

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 OH3MB in decoded directed-looking exchanges:

DA2DA · Fed. Rep. of Germany ×2 DK5RL · Fed. Rep. of Germany ×2 DL1UDO · Fed. Rep. of Germany ×2 E70SZ · Bosnia-Herzegovina ×2 IT9GJK · Sicily ×2 MW7RHR · Wales ×2 R50RKZ · European Russia ×2 EU2ABK · Belarus ×2 G4NKV/P · England ×2 HA1ZW · Hungary ×2 LY3VD · Lithuania ×2 OM0MR · Slovak Republic ×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 OH3MB

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: KP20 · 679 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,192 km (approx.)
Last such locator decoded: 2026-09-20 14:02 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	OH3MB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 14:02	40m	-13 / -	RT4A/P	- / -3	3	Partial capture
09-20 14:00	40m	-14 / -	HA8AP	- / -	2	Partial capture
09-20 13:55	40m	-17 / +1	R2FCA	+2 / -	5	✓ Full exchange observed
09-20 13:54	40m	-14 / -	RW9MZ	- / -	2	Partial capture
09-20 13:45	40m	-16 / -	YT4ZZ/P	-11 / -	2	✓ Closing observed
09-20 13:37	40m	-16 / -5	HA8AP	-8 / +5	4	✓ Full exchange observed
09-20 13:37	40m	-14 / -	UA9FMT	- / -2	2	✓ Closing fragment
09-20 13:19	40m	-20 / -	M9PMB	- / -	2	Partial capture
09-20 12:58	40m	-14 / -	UB4CLH	- / -5	3	Partial capture
09-20 12:52	40m	-16 / -	DK1TBL	-15 / -5	4	✓ Closing observed
09-20 12:41	40m	-19 / -	R9SAP	- / -9	4	✓ Closing fragment
09-20 12:26	40m	-16 / +1	DM3YBN	-7 / +1	5	✓ Full exchange observed
09-20 12:25	40m	-18 / -	G4NKV/P	- / +2	3	✓ Closing fragment
09-20 12:23	40m	-18 / -	R6FMM	- / -	2	✓ Closing fragment
09-20 12:12	40m	- / 0	YL2TM	-17 / -	4	Partial capture
09-20 12:06	40m	-21 / -	DN1DAS	- / -8	2	Partial capture
09-20 11:54	40m	-14 / -	SH7KAT	- / -	2	Partial capture
09-20 11:52	40m	-16 / -8	SP9UPH	+2 / -	6	✓ Full exchange observed
09-20 11:50	40m	-12 / +4	OK1WE	+4 / -	4	✓ Closing observed
09-20 11:03	40m	-20 / -	PD1WD	- / -12	2	Partial capture
09-20 10:58	40m	-23 / -	ON8AT	-20 / -3	2	✓ Closing observed
09-20 10:54	40m	-19 / -21	PD1WD	-17 / -7	4	Partial capture
09-20 10:31	40m	-17 / -	R2YW	- / +3	2	✓ Closing fragment
09-20 10:19	40m	- / -8	OZ9FF	-11 / -	2	✓ Closing fragment
09-20 10:16	40m	- / -11	DM5WH	-12 / -	4	Partial capture
09-20 09:58	40m	-20 / -	DJ0MAB	- / -	2	Partial capture
09-20 09:17	40m	-13 / -	F5ADE	- / -8	3	Partial capture
09-20 09:16	40m	-12 / -	SQ3EWA	-22 / -8	3	✓ Closing observed
09-20 09:07	40m	- / -	LY1DY	-9 / -	3	✓ Closing fragment
09-20 09:04	40m	-17 / -	M0ABG	- / -7	2	✓ Closing fragment
09-20 08:55	40m	-13 / -8	DK6WH	-3 / -2	5	✓ Full exchange observed
09-20 08:54	40m	-14 / -	M8PGT	- / -	2	Partial capture
09-20 08:50	40m	-17 / -	DG3FFM	-7 / +4	3	✓ Closing observed
09-20 08:47	40m	-17 / -	EI5JTB	- / -14	3	Partial capture
09-20 08:44	40m	-18 / -	EI5JTB	- / -	2	Partial capture
09-20 08:43	40m	- / -9	PD2TX	-10 / -	2	✓ Closing fragment
09-20 08:27	40m	- / -	DK2MAX	-12 / -	3	Partial capture
09-20 08:23	40m	-16 / -13	9A3MRN	-2 / -	5	✓ Closing observed
09-20 08:20	40m	-12 / -	9A5MP	- / -	2	Partial capture
09-20 08:19	40m	-13 / +6	SP2EUI	-12 / +9	4	Partial capture
09-20 08:17	40m	-12 / -	DF2WS	- / -6	4	✓ Closing fragment
09-20 08:13	40m	-16 / -	HB9LBR	- / -	3	Partial capture
09-20 08:10	40m	-14 / -12	F4DIA	-13 / -	4	✓ Closing observed
09-20 08:09	40m	-13 / -	HA1ZW	-3 / -	2	✓ Closing observed
09-20 08:01	40m	-12 / -	SM7WNM	- / +5	3	✓ Closing fragment
09-20 07:58	40m	-14 / -	OM0MR	-16 / -2	4	✓ Closing observed
09-20 07:57	40m	-12 / -	M7FHO	- / -	2	Partial capture
09-20 07:45	40m	-20 / -4	SQ6WA	+2 / +6	4	✓ Full exchange observed
09-20 07:42	40m	-21 / -	R3KMI	- / -9	3	✓ Closing fragment
09-20 07:41	40m	-22 / -	M0CKX	- / -8	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
134400 -19 1416  SP5MIG OH3MB KP20
134545 -11 1935  OH3MB YT4ZZ/P RR73
134600 -16 1416  YT4ZZ/P OH3MB 73
135445 -14 1864  RW9MZ OH3MB KP20 (x2)
135545 -20 1863  R2FCA OH3MB KP20
135600  +5 2754  OH3MB R2FCA +01
135615 -15 1862  R2FCA OH3MB R+27
135630  +0 2754  OH3MB R2FCA RR73
135645 -17 1862  R2FCA OH3MB 73
140015 -13 1752  HA8AP OH3MB KP20 (x2)
140215 -11 1752  RT4A/P OH3MB KP20 (x3)

60m

UTC    dB Audio  Message
175415  -1  809  OH3MB DG3TF -10
175430  +0 1037  DG3TF OH3MB R+12
175445  +3  809  OH3MB DG3TF RR73
175500  +0 1037  DG3TF OH3MB 73
175615  +1 1037  SP4NDY OH3MB KP20
175700  -4 1037  GX3RAF/P OH3MB KP20 (x3)
175845  -7  931  OH3MB GX3RAF/P -17
175900  -1 1049  GX3RAF/P OH3MB R-03
175915 -12  931  OH3MB GX3RAF/P -17
175930  -4 1049  GX3RAF/P OH3MB R+00
175945  -9  931  OH3MB GX3RAF/P RR73
180000  -5 1049  GX3RAF/P OH3MB 73
180015 -11  931  OH3MB GX3RAF/P 73

20m

UTC    dB Audio  Message
151100  -9 1427  OH3MB EA3JFE -02 (x3)
152415 -15  376  M8CMG OH3MB R+07 (x2)
163630 -15 1725  <...> OH3MB KP20 (x9)
173330  +1 1119  HS0QEO OH3MB KP20

80m

UTC    dB Audio  Message
182700 -15 1548  OH3MB RA4L RR73
182715  -6 1548  RA4L OH3MB 73
182745 -10 2094  R2DVU OH3MB KP20 (x3)
183215 -10 1903  RK4HS OH3MB KP20 (x3)
183330 -14 1904  OH3MB RK4HS 73
183515  +3  873  LB6LK OH3MB KP20 (x3)
183630  -3 1607  OH3MB RZ3ZY KO90 (x3)

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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