YO2DSA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Romania Most frequent locator attributed to this token: KN05

Receiver-side FT8 activity involving YO2DSA, decoded by SO8OO in southeastern Poland. 1,080 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 63 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-05.

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 1,080 FT8 messages attributed to YO2DSA as the transmitting token by decoded message structure across 63 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (62%), followed by 40 m (28%) and 20 m (8%). Most decodes (59%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9.4 dB.

Overview

1,080

Messages attributed

UTC dates decoded

213

Active 15-min windows

-9.4 dB

Estimated median S/N

Bands

160m · 24 80m · 669 40m · 298 20m · 89

First attributed message: 2026-06-06
Last attributed message: 2026-10-05 06:19 UTC

Observed FT8 message patterns

Attributed sample: 1,080 messages
Active dates: 63 UTC dates
Estimated median S/N: -9.4 dB
Estimated 10th-90th percentile: -19 to -0.8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 237, moderate (-15 to -9 dB) 355, strong (≥ -8 dB) 488.

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 YO2DSA in decoded directed-looking exchanges:

F4FSY · France ×2 CR5VP · Portugal ×2 R2AL · European Russia ×2 R5AV · European Russia ×2 EH3ST · Spain ×2 DK8EE · Fed. Rep. of Germany DL1SBE · Fed. Rep. of Germany DN9OPA · Fed. Rep. of Germany EP2AES · Iran R6AC · European Russia SV2BRT · Greece HA7XL · Hungary

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 YO2DSA

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: KN05 · 787 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 497 km (approx.)
Last such locator decoded: 2026-10-05 06:19 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	YO2DSA S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-05 06:16	40m	-13 / -	AO5CV	- / -	4	Partial capture
10-05 05:46	40m	-14 / -	SQ2RAD	- / -	2	✓ Closing fragment
10-05 05:15	40m	- / -9	IQ8DO	-20 / -	2	✓ Closing fragment
10-05 04:44	80m	-5 / -	IN3IBW	- / -8	3	Partial capture
10-04 04:51	80m	- / -4	OE100OEVSV	+9 / -	2	Partial capture
10-02 19:08	80m	- / -	YO5PSE	-8 / -	3	Partial capture
10-02 19:08	80m	- / -	IZ2BKU	-10 / -	2	Partial capture
10-02 19:07	80m	-3 / -17	DO4DXA	+1 / -	4	✓ Closing observed
10-02 19:05	80m	-2 / -	IQ2AAH	- / -	2	Partial capture
10-01 05:06	80m	- / -	SAN	-20 / -	2	Partial capture
10-01 04:57	80m	- / -	AWARD	-17 / -	6	Partial capture
10-01 04:53	80m	- / -	AWARD	-18 / -	3	Partial capture
09-30 05:16	80m	-8 / -3	SP6FME	+1 / +3	5	✓ Full exchange observed
09-30 05:03	80m	-12 / -	PJ2/W4IPC	- / +2	2	Partial capture
09-30 04:31	80m	-13 / -	PA/DL9KV/MM	- / -10	2	Partial capture
09-29 08:38	40m	-14 / -	SO100PKP	- / -	2	Partial capture
09-29 08:24	40m	-19 / -	SQ100PKP	- / -	7	Partial capture
09-29 05:57	40m	-16 / -	SQ100PKP	- / -2	2	Partial capture
09-29 05:50	40m	-17 / -18	F1MXE	-6 / -5	6	✓ Full exchange observed
09-29 05:31	40m	- / +8	LZ3CB	+15 / -	5	✓ Closing fragment
09-29 05:12	80m	-5 / -	OR7K	- / -	3	Partial capture
09-29 04:53	80m	-16 / -	E75FM	-5 / -2	6	Partial capture
09-29 04:46	80m	- / -10	DO7BE	-14 / -	3	Partial capture
09-29 04:41	80m	-13 / -	DO1BOC	-6 / -	3	✓ Closing observed
09-29 03:27	80m	-14 / -	3Z100PKP	- / +6	2	Partial capture
09-29 03:24	80m	-11 / -	SQ100PKP	- / +4	2	Partial capture
09-27 14:55	40m	-22 / -	SP100PKP	- / -	2	Partial capture
09-27 05:48	80m	-14 / -	SP100PKP	- / -	10	Partial capture
09-27 05:43	80m	-8 / -	SP100PKP	- / -	2	Partial capture
09-27 05:12	80m	-11 / -	SP100PKP	- / -	34	Partial capture
09-27 05:01	80m	-10 / -	SQ100PKP	- / -	2	Partial capture
09-27 04:53	80m	-12 / -8	SQ100PKP	+10 / +9	10	Partial capture
09-27 04:52	80m	- / -12	DL2HUC	-2 / -	3	✓ Closing fragment
09-25 06:13	40m	- / -11	SQ100PKP	-8 / -	2	Partial capture
09-25 05:26	40m	-18 / -	SN100PKP	- / -7	4	Partial capture
09-25 05:25	40m	- / -12	SN40KZE	0 / -	4	Partial capture
09-25 04:57	80m	-7 / -	VP2MAA	- / -	3	Partial capture
09-25 04:50	80m	-6 / -	VP2MAA	- / -	9	Partial capture
09-25 04:08	80m	- / -19	GM6URC	-19 / -	3	✓ Closing fragment
09-25 03:57	80m	- / -18	GM6URC	-14 / -	2	Partial capture
09-25 03:56	80m	- / -1	Z62NS	-10 / -	2	✓ Closing fragment
09-24 04:40	80m	- / -10	SQ100PKP	-5 / -	2	Partial capture
09-23 18:45	80m	- / -4	DL1JEL	-6 / -	3	✓ Closing fragment
09-23 18:11	80m	- / -12	DO9SAM	+5 / -	3	✓ Closing fragment
09-23 15:10	10m	- / -22	EP2AES	-13 / -	3	✓ Closing fragment
09-23 05:06	80m	-4 / -	SP5MXW/P	- / -2	2	Partial capture
09-23 04:58	80m	-2 / -	W9JJB	- / -	6	Partial capture
09-22 17:21	40m	- / -6	YO2LFP	-17 / -	3	✓ Closing fragment
09-22 04:57	40m	- / -10	ER1CW	-4 / -	2	✓ Closing fragment
09-22 04:55	40m	- / -13	4O7CC	-2 / -	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
083815 -15 1500  SO100PKP YO2DSA KN05 (x2)
121030  -9 1771  YO2DSA IQ9SZ/3 -03
121230 -24 1497  YO2DSA YO8ROM KN37 (x2)
051530 -20 1499  YO2DSA IQ8DO -09 (x2)
051730 -16 1733  YO2DSA IR8PR -06 (x2)
054645 -14 1500  SQ2RAD YO2DSA KN05 (x2)
061645 -12 1498  AO5CV YO2DSA KN05 (x4)

80m

UTC    dB Audio  Message
190830  -3 1463  DO4DXA YO2DSA RR73
190845 -10 2129  YO2DSA YO5PSE KN07
190845 -10  923  YO2DSA IZ2BKU JN45
190845  +0  506  YO2DSA DO4DXA 73
190915  -3 2129  YO2DSA YO5PSE KN07 (x2)
045100  +9 1776  YO2DSA OE100OEVSV -04 (x2)
045200  +4 1776  YO2DSA RR73; DL1KSW <...> -06
045845 -11 1703  YO2DSA IQ9SZ/7 -01
044445  -5 1462  IN3IBW YO2DSA KN05 (x3)
045000  +0 1168  YO2DSA IN3IBW RR73
052800  -4 1463  AO5CV YO2DSA KN05

10m

UTC    dB Audio  Message
154400 -20 1696  YO2DSA DL6ZAJ R-11
154530 -11 1440  YO2DSA DF7EE JO40 (x5)
075430  -6 2394  YO2DSA DN9OPA JN38 (x3)
080830 -20 1964  YO2DSA DK8EE JO41 (x3)
151015 -14 2218  YO2DSA EP2AES -22 (x3)

160m

UTC    dB Audio  Message
181600  -3 1157  YO2DSA IV3FSG R-15 (x2)
182615 -20 1455  CQ YO2DSA KN05 (x3)
194430  +1 1828  YO2DSA YO2MTG KN05
194445 -20 1455  YO2MTG YO2DSA -15
194500  -5 1827  YO2DSA YO2MTG R-18 (x2)
194830 +12 1456  YO2DSA HA7XL JN97 (x3)
195745 -20 1456  <SQ100PKP> YO2DSA KN05
200000  +2  830  YO2DSA RR73; OM1AN <...> -02
200915 -23 1455  CQ YO2DSA KN05                        a1

20m

UTC    dB Audio  Message
110500  -4  705  EN35UKR YO2DSA KN05
110845  +9  705  YO2DSA EN35UKR -03 (x2)
110930 -10  705  EN35UKR YO2DSA R+15
080900  +1 2105  YO2DSA II7MGBT -03
052100  -9 1617  YO2DSA <...> -19
161100 -12 2100  YO2DSA F4ACR R-06 (x2)
161500  +5 2100  YO2DSA F5PBG IN78 (x3)
054030  -2 3040  YO2DSA TA4SSK KM57 (x3)
174315 -11 2303  YO2DSA EA7LQU IM66

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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