OH3SR — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving OH3SR, decoded by SO8OO in southeastern Poland. 213 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, across 8 UTC dates in the available aggregate history. Observed between 2026-08-26 and 2026-10-02.

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 213 FT8 messages attributed to OH3SR as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (67%), followed by 80 m (28%) and 40 m (4%). Most decodes (69%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (83%); the estimated median was -0.6 dB.

Overview

213

Messages attributed

UTC dates decoded

Active 15-min windows

-0.6 dB

Estimated median S/N

Bands

160m · 142 80m · 60 60m · 3 40m · 8

First attributed message: 2026-08-26
Last attributed message: 2026-10-02 18:31 UTC

Observed FT8 message patterns

Attributed sample: 213 messages
Active dates: 8 UTC dates
Estimated median S/N: -0.6 dB
Estimated 10th-90th percentile: -11 to +13 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 30, strong (≥ -8 dB) 177.

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 OH3SR in decoded directed-looking exchanges:

RI1FJZ · Franz Josef Land ×2 7M2PDT · Japan 9A4ZM · Croatia HA8ZG · Hungary IU3RRX · Italy JA0DAI · Japan JA1SXR · Japan JA2KRE · Japan JA3FHL · Japan JA4FCV · Japan JA4FSH · Japan JA4GCL · Japan

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 OH3SR

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 · 85 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,301 km (approx.)
Last such locator decoded: 2026-10-02 18:24 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	OH3SR S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-02 18:30	160m	+12 / -	RD7O	- / -11	2	✓ Closing fragment
10-02 18:30	160m	- / -	DL4FBN	-4 / -	6	Partial capture
10-02 18:27	160m	+17 / -	7M2PDT	- / -25	3	✓ Closing fragment
10-02 18:25	160m	+16 / -	JA8HYB	- / -25	2	✓ Closing fragment
10-02 18:24	160m	+18 / -	JF3OWJ	-18 / -25	4	✓ Closing observed
10-02 18:24	160m	- / -	R7KCK	-14 / -	3	Partial capture
10-02 18:23	160m	-10 / -26	HA8ZG	-5 / -21	6	✓ Full exchange observed
09-30 21:03	160m	- / -	IW5ABF	-11 / -	7	Partial capture
09-30 21:02	160m	- / -	SV1EKI	-5 / -	2	Partial capture
09-30 21:00	160m	+12 / +3	OM3PR	-3 / -5	6	✓ Full exchange observed
09-30 21:00	160m	- / -21	YT1T	-11 / -	12	Partial capture
09-30 20:58	160m	+10 / -15	9A4ZM	-1 / -22	6	✓ Full exchange observed
09-30 20:56	160m	-6 / -6	IU3RRX	-6 / -15	5	✓ Full exchange observed
09-30 20:56	160m	-2 / -	OH1LA	-23 / -1	4	✓ Full exchange observed
09-30 20:54	160m	+7 / -	YB5QZ	- / -12	3	✓ Closing fragment
09-30 20:52	160m	- / -	IW5ABF	-15 / -	3	Partial capture
09-30 20:51	160m	+14 / +3	RV1CC	-7 / -	7	✓ Full exchange observed
09-30 20:51	160m	+15 / -	JA2KRE	- / -22	2	✓ Closing fragment
09-30 20:50	160m	+12 / -	JA4FCV	- / -25	2	✓ Closing fragment
09-30 20:48	160m	+8 / -	JA4FSH	- / -8	2	✓ Closing fragment
09-30 20:47	160m	+14 / -	JA5NLN	- / -25	2	✓ Closing fragment
09-30 20:46	160m	- / -	DK1MBY	-13 / -	3	Partial capture
09-30 20:45	160m	- / -	RA3RDN	-18 / -	2	Partial capture
09-30 20:44	160m	-2 / -	YB5QZ	- / -23	2	Partial capture
09-30 20:43	160m	+14 / -6	LA9JKA	-9 / -	7	✓ Full exchange observed
09-30 20:41	160m	+10 / -	R3XBV	- / -25	2	✓ Closing fragment
09-30 04:06	80m	+2 / -	4U1UN	- / -16	5	✓ Closing fragment
09-30 03:55	80m	+5 / -	4U1UN	- / -25	13	Partial capture
09-30 03:41	80m	+12 / -	HI3QMT	- / -	2	Partial capture
09-30 03:14	80m	+3 / -	4U1UN	- / -	15	Partial capture
09-30 02:32	80m	+12 / -	4U1UN	- / -	2	Partial capture
09-30 01:42	80m	- / +3	YO4NF	+7 / -	2	Partial capture
09-30 01:40	80m	+11 / -	TN8GD	- / -25	4	✓ Closing fragment
09-30 01:36	80m	+9 / -	TN8GD	- / -	2	Partial capture
09-30 01:34	80m	+6 / +8	DL0RDG	0 / +3	11	✓ Full exchange observed
09-30 01:34	80m	- / -6	YO4NF	+8 / -	2	Partial capture
09-30 01:33	80m	+4 / -	9Y4D	-15 / -13	4	✓ Closing observed
09-30 01:24	80m	-5 / -	4U1UN	- / -	4	Partial capture
09-30 01:20	80m	-5 / -	TN8GD	- / -	2	Partial capture
09-30 00:45	80m	- / -	PE1NPS	-9 / -	4	Partial capture
09-30 00:45	80m	- / -	UA4FKT	+9 / -	3	Partial capture
09-30 00:44	80m	+2 / -17	8P6PD	-22 / -18	4	✓ Full exchange observed
09-23 20:24	160m	+5 / -	RI1FJZ	-20 / +1	10	✓ Full exchange observed
09-23 20:16	160m	-7 / -	JA4GCL	- / -18	3	✓ Closing fragment
09-23 20:15	160m	-5 / -	JA0DAI	- / -2	3	✓ Closing fragment
09-23 20:14	160m	-4 / -	JA9CHI	- / -18	2	Partial capture
09-23 20:13	160m	-8 / -	JH1GZE	- / -6	2	✓ Closing fragment
09-23 20:09	160m	-4 / -	JF1KMC	- / -19	2	✓ Closing fragment
09-23 20:05	160m	-2 / -	JJ1BMB	- / -18	2	Partial capture
09-23 20:04	160m	0 / -	JR8JSG	- / -16	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
182530 +12 1052  JA8HYB OH3SR -25 (x2)
182630 +18 1052  JF3OWJ OH3SR -25 (x2)
182730 +12 1052  7M2PDT OH3SR -25 (x3)
183015  -2 1041  OH3SR DL4FBN JO30
183030  +9 1052  RD7O OH3SR -11 (x2)
183115  -4 1041  OH3SR DL4FBN JO30 (x5)

80m

UTC    dB Audio  Message
035730 +11  913  4U1UN OH3SR KP21 (x15)

40m

UTC    dB Audio  Message
132915 -19 1867  KH8WW OH3SR KP21 (x8)

60m

UTC    dB Audio  Message
203800 -17 1799  ER1CW OH3SR KP21
203815  -8 2068  OH3SR ER1CW -06
203830  +2 1799  ER1CW OH3SR R-15
203845  -5 2068  OH3SR ER1CW RR73
203900  +4 1799  ER1CW OH3SR 73

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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee