R1CBV/3 — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia

Receiver-side FT8 activity involving R1CBV/3, decoded by SO8OO in southeastern Poland. 11 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-02 and 2026-09-16.

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 11 FT8 messages attributed to R1CBV/3 as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (91%), followed by 20 m (9%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

40m · 10 20m · 1

First attributed message: 2026-08-02
Last attributed message: 2026-09-16 14:55 UTC

Observed FT8 message patterns

Attributed sample: 11 messages
Active dates: 3 UTC dates
Estimated median S/N: -11 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, 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. 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).

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	R1CBV/3 S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-17 10:03	40m	- / -	SP5UAM	-12 / -	2	Partial capture
09-16 15:23	40m	- / 0	RY3D	+8 / -	3	Partial capture
09-16 14:40	40m	-10 / -	DG6ITP	-3 / 0	3	Partial capture
09-16 12:59	40m	-21 / -	<...>	-4 / -	2	✓ Closing fragment
09-16 12:50	40m	-23 / -	<...>	-13 / -	2	✓ Closing fragment
09-01 16:56	40m	- / 0	DF5DY	-1 / -	9	Partial capture
09-01 16:38	40m	- / -11	DL6ZAJ	0 / -	2	Partial capture
09-01 16:22	40m	- / -13	F6HRP	-16 / -	7	Partial capture
09-01 16:09	40m	-9 / -	<...>	-2 / -	3	✓ Closing fragment
09-01 16:03	40m	- / -	<...>	-14 / -	2	✓ Closing fragment
09-01 15:55	40m	-11 / -	<...>	-7 / -	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
125015 -13 1985  R1CBV/3 <...> 73
125130 -17 1985  RA7Z R1CBV/3 -14
125945 -21 1985  <...> R1CBV/3 RR73
130000  -4 2597  R1CBV/3 <...> 73
130115 -23 1985  CQ R1CBV/3
144015  -3 1985  R1CBV/3 DG6ITP JO71
144030 -10 1985  DG6ITP R1CBV/3 +00
144045  -3 1985  R1CBV/3 DG6ITP R+20
145400  -2 1985  IN3OWY R1CBV/3 -10
145500  +1 1985  SP2EWQ R1CBV/3 +01
152345  +9 2600  R1CBV/3 RY3D KO95 (x3)
100315 -10 1988  R1CBV/3 SP5UAM KO02 (x2)

20m

UTC    dB Audio  Message
134315 -24 1686  <...> R1CBV/3 RR73
135400 -10  654  R1CBV/3 <...> 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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee