OH3N — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Finland Most frequent locator attributed to this token: KP21

Receiver-side FT8 activity involving OH3N, decoded by SO8OO in southeastern Poland. 155 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-07-08 and 2026-08-01.

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 155 FT8 messages attributed to OH3N as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (75%), followed by 80 m (23%) and 20 m (2%). Most decodes (99%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (60%); the estimated median was -17 dB.

Overview

155

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

80m · 35 40m · 117 20m · 3

First attributed message: 2026-07-08
Last attributed message: 2026-08-01 21:11 UTC

Observed FT8 message patterns

Attributed sample: 155 messages
Active dates: 8 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -21 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 93, moderate (-15 to -9 dB) 32, strong (≥ -8 dB) 30.

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 OH3N in decoded directed-looking exchanges:

F5RRS · France ×3 DL9KM · Fed. Rep. of Germany ×2 4X1UF · Israel CN2DX · Morocco CT7BQA · Portugal DB7MA · Fed. Rep. of Germany DG4BD · Fed. Rep. of Germany DK9NP · Fed. Rep. of Germany EA1JWG · Spain EA3HMM · Spain EA5KV · Spain F4LNM · 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 OH3N

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: KP21 · 54 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,301 km (approx.)
Last such locator decoded: 2026-08-01 21:11 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	OH3N S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-06 21:33	20m	- / -	CT1BFP	-11 / -	12	Partial capture
08-01 21:14	20m	- / -	PD2ARI	-10 / -	3	Partial capture
08-01 21:08	20m	- / -	ON4LDZ	-4 / -	4	Partial capture
07-24 23:21	80m	-12 / -2	EI4KX	-10 / -9	5	✓ Full exchange observed
07-24 23:20	80m	- / -	DH1VY	-12 / -	2	Partial capture
07-24 23:18	80m	-11 / -17	HB9EFK	+1 / 0	4	✓ Full exchange observed
07-24 23:18	40m	- / -	DL2IR	-16 / -	3	Partial capture
07-24 23:06	40m	- / -	PE1NPS	-12 / -	2	Partial capture
07-24 23:02	40m	-10 / -	TJ1GD/P	- / -	2	✓ Closing fragment
07-24 23:00	40m	- / -	IU5VLR	-20 / -	4	Partial capture
07-24 22:57	40m	- / -	DL5AVJ	-6 / -	5	Partial capture
07-24 22:54	40m	- / -	PE1NPS	-16 / -	2	Partial capture
07-24 22:52	40m	- / -	IZ3ZQT	0 / -	4	Partial capture
07-24 22:52	40m	- / -	RX3ASQ	-20 / -	2	Partial capture
07-24 22:51	40m	- / -	DL6RS	-16 / -	4	Partial capture
07-24 22:49	40m	-19 / -10	9A2L	-12 / -	3	✓ Closing observed
07-24 22:44	40m	-20 / -	IQ8BV	- / -16	2	Partial capture
07-24 22:41	40m	- / -	DL5AVJ	-4 / -	11	Partial capture
07-24 22:34	40m	-14 / -	UF1A	- / -8	2	✓ Closing fragment
07-19 22:59	40m	-12 / -	TF8KW	- / -12	3	✓ Closing fragment
07-19 22:58	40m	-8 / -	DL8SXB	-24 / -11	4	✓ Full exchange observed
07-18 23:42	20m	- / -17	WB2EQE	-9 / -	3	✓ Closing fragment
07-18 23:36	20m	- / -16	WI1U	-16 / -	2	✓ Closing fragment
07-18 23:17	20m	- / -	R2AL	-12 / -	2	Partial capture
07-18 23:12	20m	- / +3	PW8BR	-2 / -	2	✓ Closing fragment
07-14 21:58	20m	- / -	EB4DMH	-4 / -	3	Partial capture
07-14 21:47	20m	- / -	IK0ISD	-10 / -	5	Partial capture
07-14 21:17	20m	- / -	EW3DK	-20 / -	2	Partial capture
07-14 21:13	20m	- / -	CT1BFP	-11 / -	3	Partial capture
07-14 18:48	20m	- / -5	M9VVE	-3 / -	4	✓ Closing fragment
07-14 18:43	40m	- / -2	DL6UM	-14 / -	3	✓ Closing fragment
07-14 18:42	40m	- / -10	YO9PH	-12 / -	3	Partial capture
07-14 18:40	40m	- / -13	DL3MIB	-6 / -	8	✓ Closing fragment
07-14 18:39	40m	-17 / -	UD6AUW	-18 / -14	2	Partial capture
07-14 18:39	40m	- / -1	LY1SR	-8 / -	2	✓ Closing fragment
07-13 23:00	20m	- / -	CT7BQA	-8 / -	2	✓ Closing fragment
07-13 22:53	80m	-5 / -20	TA4SSK	-13 / -15	11	✓ Full exchange observed
07-13 22:51	80m	-1 / -4	DK5WL	-6 / -8	4	✓ Full exchange observed
07-13 22:50	80m	-4 / -	LY4MP	- / -9	2	✓ Closing fragment
07-13 22:48	80m	- / -13	RN6MA	-5 / -	2	Partial capture
07-13 22:46	80m	-2 / -7	EA3EDU	-2 / -8	7	✓ Full exchange observed
07-13 22:44	80m	-4 / -11	HA7TM	+17 / -	4	✓ Closing observed
07-13 22:42	80m	-14 / -2	F5RRS	+3 / -5	7	✓ Full exchange observed
07-13 22:41	80m	-6 / +1	9A4ZM	+8 / -4	6	✓ Full exchange observed
07-13 22:41	80m	-4 / -11	GI8RPM	-12 / -16	4	✓ Full exchange observed
07-13 22:40	80m	-2 / -11	DB3GW	-14 / -12	4	✓ Full exchange observed
07-13 22:38	80m	-1 / -13	UA4FKT	+5 / -11	3	Partial capture
07-13 22:37	80m	-2 / -5	OK1HEH	+5 / -9	5	✓ Full exchange observed
07-13 22:37	80m	-2 / -9	DO9BAU	+5 / -	4	✓ Closing observed
07-13 22:22	40m	-19 / -	RA5BQ	-15 / -3	5	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
211430 -12 2799  OH3N PD2ARI JO22 (x2)
213345  -6  817  OH3N CT1BFP IM59 (x12)
092745  -4  556  OH3N MI7RDK IO74

80m

UTC    dB Audio  Message
225630  -3 1512  TA4SSK OH3N RR73
225645 -14 1512  OH3N TA4SSK R-20
231845  -3  229  OH3N HB9EFK -17 (x2)
231930 -11  229  HB9EFK OH3N R+00
231945  +7  229  OH3N HB9EFK RR73
232030 -15  229  CQ OH3N KP21
232045 -14 1991  OH3N DH1VY JN39
232115  -7 2178  OH3N EI4KX IO63
232115 -10 1992  OH3N DH1VY JN39
232130  -9  230  EI4KX OH3N -09
232145 -15 2178  OH3N EI4KX R-02
232200 -15  230  EI4KX OH3N RR73
232215  -8 2178  OH3N EI4KX 73
232245 +11 1634  OH3N IU2VWQ JN45

40m

UTC    dB Audio  Message
230215  -9  590  TJ1GD/P OH3N KP21 (x2)
230345 -12  590  CQ OH3N KP21
230415 -12  591  F1IQH OH3N -08
230545 -11  590  CQ OH3N KP21
230600  +1 2606  OH3N IQ4JO JN63
230630 -12 2378  OH3N PE1NPS JO22
230630 -21 1689  OH3N EA3AAY JN11
230700 -12 2378  OH3N PE1NPS JO22
230700 -12  776  OH3N EA3ACQ RR73
231430 -21 1468  OH3N SV9MBH 73
231700  +5 2606  OH3N IQ4JO JN63
231800 -18 1585  OH3N DL2IR JN49 (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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