RT3C — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia

Receiver-side FT8 activity involving RT3C, decoded by SO8OO in southeastern Poland. 23 FT8 messages attributed to this token as transmitter, on 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-09-07 and 2026-09-12.

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 23 FT8 messages attributed to RT3C as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). Most decodes (83%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (65%); the estimated median was -12 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

40m · 23

First attributed message: 2026-09-07
Last attributed message: 2026-09-12 17:06 UTC

Observed FT8 message patterns

Attributed sample: 23 messages
Active dates: 4 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -19 to -8 dB
Recurring-pattern threshold: Met

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

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 RT3C in decoded directed-looking exchanges:

EU4U · Belarus EW4DX · Belarus R2YW · European Russia R4CEC · European Russia RA3PGR · European Russia RA3ZOM · European Russia RA6ZS · European Russia RJ6ON · European Russia RM6OM · European Russia RU3GC · European Russia RV3X · European Russia RY4ABB · European Russia

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	RT3C S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-12 17:05	40m	-12 / -	UA3ZQN	+3 / +3	3	✓ Closing observed
09-12 16:57	40m	- / -13	RZ7KR	-1 / -	2	✓ Closing fragment
09-11 15:17	40m	- / -15	EX7CQ	-6 / -	2	Partial capture
09-11 15:14	40m	- / -	R3WDW	+3 / -	2	Partial capture
09-11 15:13	40m	- / -18	EW4DX	-4 / -	4	✓ Closing fragment
09-11 15:10	40m	- / -10	RA3ZOM	+7 / -	3	✓ Closing fragment
09-11 15:09	40m	- / -7	R2YW	-1 / -	2	✓ Closing fragment
09-11 15:09	40m	- / +2	R4ML	-5 / -	2	Partial capture
09-11 15:02	40m	-18 / -15	RA3ZOM	+2 / -8	8	Partial capture
09-08 16:33	40m	- / -13	R4CEC	-13 / -	2	✓ Closing fragment
09-08 16:30	40m	-14 / -10	RM6OM	-3 / -17	4	✓ Full exchange observed
09-08 16:29	40m	- / -4	RA6ZS	-9 / -	2	✓ Closing fragment
09-08 16:25	40m	- / +4	PA2RO	-7 / -	2	Partial capture
09-08 16:25	40m	-10 / -2	EU4U	+2 / -6	4	✓ Full exchange observed
09-08 16:22	40m	-8 / -14	YO8RAW	+11 / -	4	✓ Closing observed
09-07 20:30	40m	-6 / -11	UB3BGN	-1 / -18	8	Partial capture
09-07 20:27	40m	- / -5	RY4ABB	-6 / -	2	✓ Closing fragment
09-07 05:48	40m	-11 / -3	SP4MPH	-4 / -	3	✓ Closing observed
09-07 05:44	40m	- / -11	RJ6ON	+1 / -	2	✓ Closing fragment
09-07 05:42	40m	- / -4	SO100PKP	+10 / -	2	Partial capture
09-07 05:40	40m	-12 / -7	RA4FEA	-6 / -10	2	Partial capture
09-07 05:37	40m	- / +1	RU3GC	+4 / -	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
151415  -3 1905  RT3C EW4DX 73
151445  +2 2635  RT3C R3WDW KO81
151445  -3 1905  RT3C EW4DX 73
151515  +4 2635  RT3C R3WDW KO81
151700  -6  828  RT3C EX7CQ R-15 (x2)
164630 -12 1597  RT3C R1BDX R-04
164845 -24 1323  RA6OD RT3C -02
165045 -17 1322  RV9WJP RT3C -19
165445 -12 1322  R2RCQ RT3C -15
165745  +0  548  RT3C RZ7KR R-13 (x2)
170545 -11 1322  UA3ZQN RT3C +03 (x2)
170700  +3 2397  RT3C UA3ZQN 73

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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