OH3CBN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Finland Most frequent locator attributed to this token: KP11

Receiver-side FT8 activity involving OH3CBN, decoded by SO8OO in southeastern Poland. 448 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 24 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-18.

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 448 FT8 messages attributed to OH3CBN as the transmitting token by decoded message structure across 24 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (66%), followed by 40 m (33%) and 80 m (0%). Most decodes (56%) fell within the six-hour window 09:00-15:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

448

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 1 40m · 150 20m · 296 10m · 1

First attributed message: 2026-06-06
Last attributed message: 2026-09-18 19:44 UTC

Observed FT8 message patterns

Attributed sample: 448 messages
Active dates: 24 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -16 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 48, moderate (-15 to -9 dB) 190, strong (≥ -8 dB) 210.

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 OH3CBN in decoded directed-looking exchanges:

IK4LZH · Italy ×3 F1PBZ · France ×2 HG1DBQ · Hungary ×2 RQ6Z · European Russia 2E1HAT · England 9A3MKK · Croatia CT7ALI · Portugal CT7BQA · Portugal DL9JD · Fed. Rep. of Germany EA9UV · Ceuta & Melilla F1PPH · France F4JVF · France

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 OH3CBN

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: KP11 · 297 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,288 km (approx.)
Last such locator decoded: 2026-09-18 19:44 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	OH3CBN S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-18 19:47	40m	- / -14	PD9HIX	+4 / -	4	Partial capture
09-07 19:35	40m	-8 / -	9V1RS	- / -	3	Partial capture
09-07 19:34	40m	- / -14	RA4HG	-3 / -	2	Partial capture
09-07 19:29	40m	-10 / -12	HG1DBQ	+2 / -3	5	✓ Full exchange observed
09-07 19:29	40m	- / -12	UB6OCP	-13 / -	5	✓ Closing fragment
09-07 19:28	40m	- / -	DG5PW	-8 / -	2	Partial capture
09-04 00:13	40m	-9 / -	HC1DAZ	- / -	5	Partial capture
09-03 23:56	40m	- / -7	GM7JQK	-6 / -	2	✓ Closing fragment
09-03 23:55	40m	- / -13	R2SL	+12 / -	2	✓ Closing fragment
09-03 23:46	40m	- / +5	RY4D	-12 / -	2	✓ Closing fragment
09-03 23:43	40m	- / -14	R3PJV	-8 / -	2	Partial capture
08-29 13:03	20m	- / -4	IK4LZH	+2 / -	2	✓ Closing fragment
08-14 15:43	20m	- / -	CR7BXA	-20 / -	3	Partial capture
08-14 10:06	20m	- / -8	EA5AR	-7 / -	2	Partial capture
08-14 09:57	20m	- / -13	F4NBB	-14 / -	2	Partial capture
08-14 09:35	20m	- / +6	IK4LZH	+10 / -	3	✓ Closing fragment
08-11 09:43	20m	- / -	IK4LZH	+7 / -	4	Partial capture
08-10 09:12	20m	- / -10	F4JVF	-12 / -	2	✓ Closing fragment
08-05 20:58	20m	- / +1	M7DBB	-11 / -	3	✓ Closing fragment
08-04 09:47	20m	- / -17	F1PBZ	-4 / -	2	✓ Closing fragment
08-03 19:51	20m	- / -15	TA6B	-12 / -	2	✓ Closing fragment
08-02 10:33	20m	-6 / -	UZ5DM	- / +4	3	✓ Closing fragment
07-28 10:16	20m	- / -8	PD1TVN	-4 / -	2	✓ Closing fragment
07-28 10:08	20m	- / -2	DL9KM	-8 / -	2	Partial capture
07-28 09:37	20m	- / -8	<...>	-17 / -	2	Partial capture
07-28 09:32	20m	- / -1	M7INZ	-12 / -	4	✓ Closing fragment
07-26 19:53	10m	- / -14	RQ6Z	-22 / -	2	✓ Closing fragment
07-25 09:49	10m	- / +2	F4HMP	-12 / -	2	Partial capture
07-25 09:38	10m	- / -	DN9OPA	-17 / -	2	Partial capture
07-25 09:36	10m	- / -	DG1PO	-14 / -	2	Partial capture
07-23 21:18	40m	- / -	DM4GG	-6 / -	2	Partial capture
07-23 21:18	40m	- / -8	PD1HBL	-14 / -	2	Partial capture
07-23 21:14	40m	- / -5	I3LTT	-12 / -	2	✓ Closing fragment
07-23 21:13	40m	- / -12	RQ6A	-11 / -	2	✓ Closing fragment
07-23 15:18	20m	- / -	PD2XX	-23 / -	2	✓ Closing fragment
07-21 19:34	20m	- / -	F1PPH	-13 / -	7	Partial capture
07-16 17:16	20m	- / -13	DL9JD	-14 / -	2	✓ Closing fragment
07-15 21:07	20m	- / -9	EA9UV	-4 / -	2	✓ Closing fragment
07-15 09:28	20m	- / -4	IK4LZH	+8 / -	5	✓ Closing fragment
07-14 19:16	20m	- / -	M7OOT	-10 / -	2	Partial capture
07-14 09:34	20m	- / -	DL1R	-2 / -	6	Partial capture
07-13 20:31	40m	- / -	DH8KAM	-23 / -	5	Partial capture
07-13 20:23	40m	- / -13	UB3DRL	-16 / -	2	✓ Closing fragment
07-13 20:08	20m	- / -19	LZ1WV	-2 / -	2	✓ Closing fragment
07-11 09:54	20m	- / -11	DF4TC	-21 / -	2	Partial capture
07-09 10:52	20m	-13 / -	OH7FQH	- / -	2	Partial capture
07-06 22:32	40m	-20 / -	OZ7FOC	-18 / -	3	✓ Closing observed
07-06 10:57	20m	- / -	EA3GXK	-11 / -	5	Partial capture
07-03 20:21	20m	- / -1	M7INZ	0 / -	7	Partial capture
07-03 14:31	20m	- / -14	F4LNM	-23 / -	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
193000 -14 1247  OH3CBN SP3DLD JO71
193000  +5 1633  OH3CBN HG1DBQ 73
193030 -12 1895  OH3CBN UB6OCP R-12 (x2)
193245  -5 1247  CQ OH3CBN KP11
193430  -1 1135  OH3CBN RA4HG -14 (x2)
193500 -16 1246  9V1RS OH3CBN KP11 (x3)
194400 -12 2253  ND9M OH3CBN KP11
194715  +3  589  OH3CBN PD9HIX -14 (x4)

20m

UTC    dB Audio  Message
092115 -12 1692  OH3CBN EA3KY -05
093515 +12  462  OH3CBN IK4LZH JN54 (x3)
095730 -13 1225  OH3CBN F4NBB -13 (x2)
095930  -9  760  OH3CBN TM0BSM RRR
100600  -7  651  OH3CBN EA5AR -08 (x2)
154315 -22 1880  OH3CBN CR7BXA IN51 (x3)
130315  +1  464  OH3CBN IK4LZH R-04 (x2)
132445 -11 1280  OH3CBN R6UBD -13

10m

UTC    dB Audio  Message
093630 -14 1983  OH3CBN DG1PO JN39
093645 -21 1284  DO1FKM OH3CBN -11
093700 -13 1983  OH3CBN DG1PO JN39
093830 -16 2400  OH3CBN DN9OPA JN38 (x2)
094600 -18 1283  OH3CBN PD1HPB R-12
094900 -13 1283  OH3CBN F4HMP JN39 (x2)
195345 -22 1511  OH3CBN RQ6Z -14 (x2)

80m

UTC    dB Audio  Message
201815 -14 1609  RA6FYL OH3CBN KP11

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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