YO8SJD — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Romania Most frequent locator attributed to this token: KN37

Receiver-side FT8 activity involving YO8SJD, decoded by SO8OO in southeastern Poland. 77 FT8 messages attributed to this token as transmitter, on 80m, across 1 UTC dates in the available aggregate history. Last observed 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 77 FT8 messages attributed to YO8SJD as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). In this small sample, the estimated median decoder S/N was +6 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

+6 dB

Estimated median S/N

Bands

80m · 77

First attributed message: 2026-09-18
Last attributed message: 2026-09-18 23:21 UTC

Observed FT8 message patterns

Attributed sample: 77 messages
Active dates: 1 UTC dates
Estimated median S/N: +6 dB
Estimated 10th-90th percentile: -2 to +13 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 77.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with YO8SJD in decoded directed-looking exchanges:

DK2MAX · Fed. Rep. of Germany ×3 ON4MAP · Belgium ×2 SP4NKU · Poland ×2 DL8HXP · Fed. Rep. of Germany DO3LZ · Fed. Rep. of Germany EA3HMM · Spain EU7FBB · Belarus HF7X · Poland R4FDK · European Russia RN3YN · European Russia RY3F · European Russia T77RN · San Marino

Most frequent locator attributed to YO8SJD

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: KN37 · 44 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 468 km (approx.)
Last such locator decoded: 2026-09-18 23:21 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	YO8SJD S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-18 23:21	80m	+7 / -	TA4/DD1WT	- / -12	3	Partial capture
09-18 23:16	80m	- / -	OM1AGE	-4 / -	2	Partial capture
09-18 23:16	80m	+7 / -6	ON4MAP	-12 / -16	10	✓ Full exchange observed
09-18 23:12	80m	+6 / -5	DL8HXP	+7 / +4	11	✓ Full exchange observed
09-18 23:10	80m	+3 / +4	DK2MAX	+4 / -1	3	✓ Full exchange observed
09-18 23:02	80m	+10 / -	EX7DY	- / -	2	Partial capture
09-18 23:01	80m	+11 / -	R4FDK	- / -13	3	✓ Closing fragment
09-18 22:59	80m	+12 / -10	HF7X	-8 / -10	6	✓ Full exchange observed
09-18 22:57	80m	+4 / -	TA4/DD1WT	- / -	2	Partial capture
09-18 22:56	80m	+4 / -	T77RN	-20 / -11	4	✓ Full exchange observed
09-18 22:51	80m	+5 / -10	DK2MAX	+1 / 0	10	✓ Full exchange observed
09-18 22:49	80m	-2 / -	SP4NKU	+2 / -1	3	✓ Closing observed
09-18 22:48	80m	- / -3	R2EA/P	-6 / -	2	Partial capture
09-18 22:47	80m	+11 / -10	RN3YN	-9 / -12	5	✓ Full exchange observed
09-18 22:45	80m	0 / -10	EU7FBB	+4 / +8	3	✓ Full exchange observed
09-18 22:41	80m	+2 / -10	DO3LZ	-6 / -14	6	✓ Full exchange observed
09-18 22:38	80m	+5 / -2	DK2MAX	-1 / -1	8	✓ Full exchange observed
09-18 22:37	80m	+8 / -5	EA3HMM	-12 / -9	6	✓ Full exchange observed
09-18 22:33	80m	-4 / -6	RY3F	-16 / +2	4	✓ Full exchange observed
09-18 22:30	80m	- / -9	R2EA/P	-6 / -	2	Partial capture
09-18 22:30	80m	+4 / -1	YO4NF	+6 / -	5	✓ Full exchange observed
09-18 22:28	80m	+2 / -11	UB3DRL	-11 / +1	7	✓ Full exchange observed
09-18 22:26	80m	+3 / -11	RN3YN	-10 / -	11	Partial capture
09-18 22:25	80m	+13 / -	HF40BLP	- / -	3	Partial capture
09-18 22:13	80m	-2 / -	ON6JN	- / -	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
231630  +5 1201  ON4MAP YO8SJD KN37
231645  -4 2652  YO8SJD OM1AGE JN88
231700  +4 1201  ON4MAP YO8SJD KN37
231715  -5 2654  YO8SJD OM1AGE JN88
231730  +2 1201  ON4MAP YO8SJD KN37 (x4)
231915 -11  541  YO8SJD ON4MAP -06
231930 +13 1201  ON4MAP YO8SJD R-16
231945 -12  541  YO8SJD ON4MAP RR73
232000  +6 1201  ON4MAP YO8SJD 73
232100  +4 1201  TA4/DD1WT YO8SJD KN37 (x3)

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