SV8TBJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Greece Most frequent locator attributed to this token: JM99

Receiver-side FT8 activity involving SV8TBJ, decoded by SO8OO in southeastern Poland. 29 FT8 messages attributed to this token as transmitter, on 160m, 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-26 and 2026-09-20.

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 29 FT8 messages attributed to SV8TBJ as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (52%), followed by 160 m (41%) and 20 m (7%). Several six-hour UTC windows tied for the largest share (76%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (79%); the estimated median was -20 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-20 dB

Estimated median S/N

Bands

160m · 12 40m · 15 20m · 2

First attributed message: 2026-06-26
Last attributed message: 2026-09-20 18:52 UTC

Observed FT8 message patterns

Attributed sample: 29 messages
Active dates: 6 UTC dates
Estimated median S/N: -20 dB
Estimated 10th-90th percentile: -24 to -9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 23, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 2.

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 SV8TBJ in decoded directed-looking exchanges:

SV2AEL · Greece IU5RBX · Italy

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 SV8TBJ

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: JM99 · 24 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,181 km (approx.)
Last such locator decoded: 2026-09-20 18:52 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	SV8TBJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 18:51	160m	-23 / -	4X1UF	- / -	3	Partial capture
09-20 18:38	160m	- / -	IV3VFR	0 / -	2	Partial capture
09-20 18:38	160m	- / -13	SV2AEL	0 / -	2	✓ Closing fragment
09-20 18:29	160m	-17 / -	RI1FJZ	- / -	2	Partial capture
09-20 17:56	160m	-22 / -	RI1FJZ	- / -	4	Partial capture
09-20 17:47	160m	-23 / -	RI1FJZ	- / -	3	Partial capture
08-31 23:00	40m	-10 / -	RI1FJL	- / -11	5	Partial capture
07-24 07:19	20m	- / -	IU4BJC	-10 / -	9	Partial capture
07-14 18:45	40m	-21 / -	T22TT	- / -	2	Partial capture
07-14 17:31	40m	-21 / -	T22TT	- / -	3	Partial capture
06-30 06:38	20m	-20 / -	N9W	- / -	2	Partial capture
06-26 17:47	40m	-16 / -	YC2ALF	- / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
174845 -24 1226  RI1FJZ SV8TBJ JM99 (x7)
183100 +13 2646  SV8TBJ UA3ZUX KO90
183845  +0 2370  SV8TBJ SV2AEL -13
183845  -3 2175  SV8TBJ IV3VFR JN65
183915  +1 2370  SV8TBJ SV2AEL RR73
183915  +4 2175  SV8TBJ IV3VFR JN65
185100 -24 1631  4X1UF SV8TBJ JM99 (x3)

40m

UTC    dB Audio  Message
172745 -23 2185  T22TT SV8TBJ JM99 (x4)
184030 -21 1979  SV8TBJ IU5RBX 73
184130  -7 2810  SV8TBJ R3DHP KO95
184545 -20 1578  T22TT SV8TBJ JM99 (x2)
195645 -19 2043  BO0M SV8TBJ JM99
230015 -14 2080  RI1FJL SV8TBJ JM99 (x5)
182100  +6 1232  SV8TBJ 9A4ZM JN86

20m

UTC    dB Audio  Message
063830 -19 1664  N9W SV8TBJ JM99 (x2)
064300 -19 2072  SV8TBJ IU5TPM JN53
071930 -16 1024  SV8TBJ IU4BJC JN54 (x9)
070830 -10 1509  SV8TBJ RR73; US3EW <...> -12

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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