OL900CO — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Czech Republic

Receiver-side FT8 activity involving OL900CO, decoded by SO8OO in southeastern Poland. 2,133 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 14 UTC dates in the available aggregate history. Observed between 2026-06-12 and 2026-10-09.

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 2,133 FT8 messages attributed to OL900CO as the transmitting token by decoded message structure across 14 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (54%), followed by 40 m (43%) and 20 m (4%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (84%); the estimated median was +3.1 dB.

Overview

2,133

Messages attributed

UTC dates decoded

Active 15-min windows

+3.1 dB

Estimated median S/N

Bands

80m · 1,145 40m · 909 20m · 79

First attributed message: 2026-06-12
Last attributed message: 2026-10-09 18:27 UTC

Observed FT8 message patterns

Attributed sample: 2,133 messages
Active dates: 14 UTC dates
Estimated median S/N: +3.1 dB
Estimated 10th-90th percentile: -11 to +11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 76, moderate (-15 to -9 dB) 255, strong (≥ -8 dB) 1,802.

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 OL900CO in decoded directed-looking exchanges:

LZ67PP · Bulgaria ×8 IU3WNU · Italy ×2 HF780C · Poland ×2 HF85MK · Poland ×2 8B81JG · Indonesia 8D81RI · Indonesia JR1UFN · Japan SP9ABN · Poland UW5IM · Ukraine CT1CLO · Portugal DH7ULX · Fed. Rep. of Germany DL1HDL · Fed. Rep. of Germany

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.

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	OL900CO S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-09 18:27	80m	- / -	HF780C	-6 / -	2	✓ Closing fragment
10-09 18:26	80m	- / -	DL8UNO	+9 / -	3	Partial capture
10-09 18:05	80m	- / -6	DK6WS	-1 / -	2	Partial capture
10-09 17:07	80m	- / +5	SQ9LOJ	+4 / -	3	Partial capture
10-09 17:04	80m	- / -	DL7AOM	+11 / -	2	Partial capture
10-09 00:00	80m	- / -	F5SJF	-8 / -	62	Partial capture
10-08 22:30	80m	- / -	IK2SGB	+6 / -	2	Partial capture
10-08 22:29	80m	- / +1	F5PBG	0 / -	2	Partial capture
10-08 20:21	80m	+6 / -	OM2WW	- / +9	2	Partial capture
10-08 20:20	80m	+4 / -	<...>	+6 / -	3	✓ Closing fragment
10-08 20:16	80m	+8 / +2	UA6LQZ	-10 / -11	3	Partial capture
10-08 20:14	80m	+9 / -	<...>	-3 / -	5	✓ Closing fragment
10-08 20:12	80m	+8 / -	ON8LX	- / -2	4	Partial capture
10-08 20:09	80m	- / -1	DO2BBC	-4 / -	2	Partial capture
10-08 20:09	80m	+11 / -	<...>	+3 / -	3	✓ Closing fragment
10-08 20:07	80m	+10 / -	<...>	-4 / -	2	✓ Closing fragment
10-08 20:06	80m	+9 / -	OM4KK	+9 / +4	9	Partial capture
10-08 20:03	80m	+10 / -	OH8WW	- / +2	7	Partial capture
10-08 19:59	80m	+9 / -	DO3BOX	- / -13	3	Partial capture
10-08 19:52	80m	+8 / -	ON4CAS	- / -23	3	Partial capture
10-08 19:49	80m	+4 / -12	SP5EXA	+16 / -2	5	Partial capture
10-08 19:48	80m	+9 / -	<...>	+3 / -	5	✓ Closing fragment
10-08 19:44	80m	+8 / -22	UC6D	-2 / -6	3	Partial capture
10-08 19:42	80m	+9 / -	<...>	-14 / -	6	✓ Closing fragment
10-08 19:38	80m	+8 / -	DK0NZ	-1 / -15	3	Partial capture
10-08 19:35	80m	+6 / +8	DL3AWB	+5 / -20	2	Partial capture
10-08 19:35	80m	+7 / -	<...>	+2 / -	4	✓ Closing fragment
10-08 19:34	80m	+3 / -	OM3PR	+6 / -17	3	Partial capture
10-08 19:29	80m	- / -3	DO3BOX	-9 / -	3	Partial capture
10-08 19:28	80m	+7 / +4	R2FEA	-4 / -15	2	Partial capture
10-08 19:26	80m	+11 / -	<...>	-1 / -	7	✓ Closing fragment
10-08 19:25	80m	+5 / 0	SP1ADT	-3 / -9	2	Partial capture
10-08 19:24	80m	- / -	SP1MGM	-9 / -	2	Partial capture
08-24 20:38	40m	- / -16	R2HB	-4 / -	2	Partial capture
08-24 20:24	40m	-3 / -	<...>	-11 / -	4	✓ Closing fragment
08-24 20:24	40m	- / -22	SP8KNF	-17 / -	2	Partial capture
08-24 20:21	40m	-9 / -3	DG7ABL	-12 / -7	4	Partial capture
08-24 20:17	40m	+4 / -	<...>	-5 / -	2	✓ Closing fragment
08-24 20:15	40m	+7 / -	SQ4FDK	- / -4	3	Partial capture
08-24 20:14	40m	- / -18	YO4LUP	-10 / -	2	Partial capture
08-24 20:14	40m	+2 / -	M0GDX	- / -21	2	Partial capture
08-24 20:12	40m	+7 / -	S56TNT	- / -17	3	Partial capture
08-24 20:09	40m	+9 / -	JA6CNL	- / -18	4	Partial capture
08-24 20:09	40m	+7 / -	<...>	+10 / -	2	✓ Closing fragment
08-24 20:01	40m	+9 / -	<...>	-17 / -	2	✓ Closing fragment
08-24 20:00	40m	+2 / -6	HB9UQF	-20 / -16	3	Partial capture
08-24 20:00	40m	-4 / -	IU4AAJ	- / -12	4	Partial capture
08-24 19:59	40m	+6 / -	<...>	-4 / -	2	✓ Closing fragment
08-24 19:58	40m	+6 / -	RA7Z	-8 / -11	2	Partial capture
08-24 19:52	40m	+8 / -	HA5AZD	- / +3	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
170730  +8 2232  OL900CO SQ9LOJ JO90 (x3)
170900 +10 2232  HF780C OL900CO 73
175715  +6 1160  OL900CO SP3SBY R+09
180530  -3 1207  OL900CO DK6WS R-06 (x2)
182630  +4 1096  OL900CO DL8UNO JO71
182645  -5 1515  DA6WM OL900CO -01
182700  +8 1096  OL900CO DL8UNO JO71
182715  -1 1514  OL900CO HF780C RR73
182730 +14 1096  OL900CO DL8UNO JO71
182745  -7 1514  SP3SBY OL900CO -08
182815 -11 1514  OL900CO HF780C RR73
183330  +8 2347  OL900CO SP1S -07

40m

UTC    dB Audio  Message
202415 -21 1383  OL900CO SP8KNF KN09 (x2)
202445 -11 1540  OL900CO <...> RR73
202500  +2 1329  <...> OL900CO 73
202530  +1 1328  CQ OL900CO (x2)
202630  -3 1329  YU7AS OL900CO -03
202645  -1 1329  OL900CO DL5RCN JN68
202700  -7 1329  <...> OL900CO RR73
202730  -1 1329  PI4TX OL900CO -19
202800  -4 1329  <...> OL900CO RR73
202830  -6 1329  YL2IV OL900CO +01
202930  -3 1328  CQ OL900CO
203815  -3 1804  OL900CO R2HB KO85 (x2)

20m

UTC    dB Audio  Message
184345  -9 1332  OL900CO <...> RR73
184715  -6 1332  OL900CO EA1AA IN83 (x2)
185415 -10 1333  OL900CO PD3LKN JO22 (x3)
185645  -9 1255  <OL900CO> EC1KD IN72
185645  -9 1333  OL900CO <...> 73
185715  -6 1255  OL900CO EC1KD R+13
185745  -8 1255  OL900CO <...> 73 (x3)
191545  +8 2093  OL900CO DJ5FS R-04

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.

CW

5 CW reception events in the last 30 days.

40m: 5 events; last heard 2026-10-19 19:26 UTC

Latest CW receptions

UTC	Band	kHz	S/N · 500 Hz	WPM	Listen
2026-10-19 19:26:06	40m	7020.039	20.5 dB	—	WebSDR ↗
2026-10-19 19:21:54	40m	7020.039	18.7 dB	—	WebSDR ↗
2026-10-19 19:19:35	40m	7020.039	17.5 dB	—	WebSDR ↗
2026-10-19 19:18:27	40m	7020.039	19.9 dB	—	WebSDR ↗
2026-10-19 19:00:11	40m	7020.039	21.1 dB	—	WebSDR ↗

CW reception history

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