R3TBC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO15

Receiver-side FT8 activity involving R3TBC, decoded by SO8OO in southeastern Poland. 14 FT8 messages attributed to this token as transmitter, on 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-15 and 2026-08-23.

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 14 FT8 messages attributed to R3TBC as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -13 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

20m · 14

First attributed message: 2026-06-15
Last attributed message: 2026-08-23 11:16 UTC

Observed FT8 message patterns

Attributed sample: 14 messages
Active dates: 4 UTC dates
Estimated median S/N: -13 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 6.

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 R3TBC in decoded directed-looking exchanges:

R6OF · European Russia RN6MA · European Russia RO6K · European Russia UF6VX · European Russia DH2RL · Fed. Rep. of Germany DL7ARV · Fed. Rep. of Germany EI5HV · Ireland I1RJP · Italy IQ6PE · Italy MM0JTV · Scotland OH3OJ · Finland R3LCG · European Russia

Most frequent locator attributed to R3TBC

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: LO15 · 10 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,549 km (approx.)
Last such locator decoded: 2026-08-23 11:16 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	R3TBC S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-29 05:00	20m	- / -13	ZL2BX	-1 / -	2	✓ Closing fragment
08-23 11:13	20m	-16 / -	EI5HV	-13 / -	3	✓ Closing observed
08-23 11:10	20m	+5 / -	G4BPJ	- / -	2	Partial capture
08-23 11:08	20m	0 / -	G8KHF	- / -11	3	Partial capture
08-22 19:20	20m	- / -7	UN0GY	+7 / -	2	✓ Closing fragment
08-18 20:00	40m	- / -14	S59ST	-18 / -	2	✓ Closing fragment
08-18 19:54	40m	- / -5	YO4NF	+4 / -	2	✓ Closing fragment
08-18 19:53	40m	- / -9	R2EA/P	-12 / -	2	✓ Closing fragment
08-18 19:46	40m	- / -11	I1RJP	-8 / -	2	Partial capture
08-12 19:18	20m	- / -14	R3LCG	-9 / -	3	✓ Closing fragment
08-12 15:11	20m	- / -10	DH2RL	-16 / -	2	✓ Closing fragment
08-06 15:17	20m	- / -11	IV3IUM	-3 / -	3	Partial capture
07-11 19:46	40m	- / -14	RA3TVW	-14 / -	2	Partial capture
07-11 19:45	40m	- / -19	IK4LZH	-7 / -	3	Partial capture
07-11 19:43	40m	- / -11	DL6NDN	-10 / -	2	✓ Closing fragment
07-11 19:41	40m	- / -21	DK7ZT	-10 / -	2	✓ Closing fragment
07-11 19:31	40m	- / -5	RL3F	-14 / -	8	✓ Closing fragment
07-11 19:21	40m	- / -15	R2DX	-6 / -	2	✓ Closing fragment
07-11 18:59	40m	- / -15	EW8AAC	-12 / -	4	Partial capture
07-08 10:51	10m	- / -6	RN6MA	-3 / -	4	✓ Closing fragment
07-08 10:49	10m	- / -11	R6OF	-7 / -	2	✓ Closing fragment
07-08 10:39	10m	- / -7	R7DX	-12 / -	2	Partial capture
07-08 10:37	10m	- / -	UF6VX	-18 / -	2	✓ Closing fragment
07-01 20:00	20m	- / -12	IQ4JO	-2 / -	2	Partial capture
07-01 19:53	20m	- / -14	YO4LUP	-12 / -	2	✓ Closing fragment
06-26 17:07	40m	- / -17	RC6OD	-9 / -	2	✓ Closing fragment
06-26 17:03	20m	- / -14	DK5CW	-7 / -	13	Partial capture
06-26 17:01	20m	- / -16	I1RJP	+6 / -	4	✓ Closing fragment
06-26 16:59	20m	- / -13	MM0JTV	-10 / -	2	✓ Closing fragment
06-25 16:32	20m	- / +2	DL6LAG	+1 / -	5	Partial capture
06-25 16:28	40m	- / -14	EU7FBB	-2 / -	4	Partial capture
06-25 04:06	20m	- / -15	IQ6PE	-8 / -	2	✓ Closing fragment
06-23 19:43	40m	- / -10	RU3XW	-18 / -	2	Partial capture
06-23 19:39	40m	- / -18	SP9UPH	+1 / -	3	✓ Closing fragment
06-23 19:30	40m	- / -8	RZ3DW	+5 / -	3	✓ Closing fragment
06-23 19:29	40m	- / -14	RD3BTW	-14 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
192045  +6 2806  R3TBC UN0GY -07 (x2)
110700  -7 2536  R3TBC DL7ARV 73
110845  +0 2535  G8KHF R3TBC LO15 (x3)
111030  +1 2535  G4BPJ R3TBC LO15 (x2)
111215 -13 2535  G8KHF R3TBC LO15
111315 -12 2535  EI5HV R3TBC LO15
111400 -13 2182  R3TBC EI5HV RR73
111415 -19 2535  EI5HV R3TBC 73
111630 -19 2535  M1DZI R3TBC LO15
050015  -2  897  R3TBC ZL2BX -13 (x2)

40m

UTC    dB Audio  Message
194545  -8  437  R3TBC IK4LZH -19
194615 -14  853  R3TBC RA3TVW LO25
194615  -7  437  R3TBC IK4LZH -19
194645 -13  852  R3TBC RA3TVW R-14
194645  -7  438  R3TBC IK4LZH -19
201545 -15 1112  R3TBC I1RJP JN45 (x3)
195145 -14 1012  R3TBC SP3IPA JO82
195315 -12 2421  R3TBC R2EA/P -09 (x2)
195415  +2  706  R3TBC YO4NF -05 (x2)
200030 -18 1295  R3TBC S59ST -14 (x2)

10m

UTC    dB Audio  Message
075545 -18 1112  R3TBC RO6K RR73
103745 -16 2325  R3TBC UF6VX RR73 (x2)
103915  -7 1422  R3TBC R7DX KN84 (x2)
104915  -7  508  R3TBC R6OF -11 (x2)
105145  -2  842  R3TBC RN6MA -06 (x4)

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