RC3DE — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO85

Receiver-side FT8 activity involving RC3DE, decoded by SO8OO in southeastern Poland. 16 FT8 messages attributed to this token as transmitter, on 40m, across 3 UTC dates in the available aggregate history. Observed between 2026-09-12 and 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 16 FT8 messages attributed to RC3DE 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 (100%). In this small sample, the estimated median decoder S/N was -9 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

40m · 16

First attributed message: 2026-09-12
Last attributed message: 2026-09-18 21:13 UTC

Observed FT8 message patterns

Attributed sample: 16 messages
Active dates: 3 UTC dates
Estimated median S/N: -9 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 8.

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 RC3DE in decoded directed-looking exchanges:

4X5JK · Israel DK8HC · Fed. Rep. of Germany EB3JT · Spain F6BHK · France IZ0ZIP · Italy OE6OCG · Austria OZ5AGJ · Denmark PA3EWP · Netherlands R6UBM · European Russia SM2OTU · Sweden TA3NK · Asiatic Turkey

Most frequent locator attributed to RC3DE

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: KO85 · 10 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,193 km (approx.)
Last such locator decoded: 2026-09-18 21:12 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	RC3DE S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-18 21:24	40m	- / -10	OZ5AGJ	+4 / -	3	✓ Closing fragment
09-18 21:20	40m	- / -12	F6BHK	+4 / -	4	✓ Closing fragment
09-18 21:09	40m	-10 / -	LX1MDA	- / -	2	Partial capture
09-18 21:07	40m	-5 / -	4X5JK	- / -14	3	✓ Closing fragment
09-18 20:42	40m	0 / -	JG3LGD	- / -	2	Partial capture
09-18 20:38	40m	-10 / -10	SM2OTU	-12 / -	4	✓ Closing observed
09-17 21:54	40m	- / -16	TA3NK	-5 / -	7	✓ Closing fragment
09-14 02:08	40m	- / -12	R6UBM	-8 / -	3	✓ Closing fragment
09-13 20:09	40m	- / -3	DK8HC	-2 / -	3	✓ Closing fragment
09-13 19:30	40m	-19 / -15	OE6OCG	+6 / -9	4	✓ Full exchange observed
09-13 19:29	40m	-16 / -6	IZ0ZIP	-4 / -	3	✓ Closing observed
09-12 21:03	40m	- / -10	PA3EWP	-3 / -	3	✓ Closing fragment
09-12 20:59	40m	- / -	IC8TEM	0 / -	3	Partial capture
08-30 11:31	20m	- / +1	SP1ZMO	-5 / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
210800  -2 2390  4X5JK RC3DE 73
210830  -9 1389  R8CGI RC3DE KO85
210945 -12 1314  LX1MDA RC3DE KO85 (x2)
211215  -2 2685  V51WH RC3DE KO85
211345  -6  842  R3RRC/P RC3DE R-09
212030 -20 1426  RC3DE EK/RX3DPK -17
212045  +0  767  RC3DE F6BHK JN24 (x4)
212415  +4  768  RC3DE OZ5AGJ JO47 (x3)
044230  -6 2634  RC3DE RZ6L KN97

20m

UTC    dB Audio  Message
113100 -12  672  RC3DE SP1ZMO JO73 (x5)

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