RD3DM — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

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

Receiver-side FT8 activity involving RD3DM, decoded by SO8OO in southeastern Poland. 40 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-11-01.

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 40 FT8 messages attributed to RD3DM as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (70%), followed by 40 m (28%) and 10 m (3%). Most decodes (58%) fell within the six-hour window 07:00-13:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-16 dB

Estimated median S/N

Bands

40m · 11 20m · 28 10m · 1

First attributed message: 2026-06-10
Last attributed message: 2026-11-01 15:21 UTC

Observed FT8 message patterns

Attributed sample: 40 messages
Active dates: 9 UTC dates
Estimated median S/N: -16 dB
Estimated 10th-90th percentile: -24 to -9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 22, moderate (-15 to -9 dB) 14, 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 RD3DM in decoded directed-looking exchanges:

RL3QFY · European Russia ×2 EW4DX · Belarus EX7CQ · Kyrgyzstan R6FMK · European Russia RA3QM · European Russia RZ4FWA · 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.

Most frequent locator attributed to RD3DM

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 · 28 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,193 km (approx.)
Last such locator decoded: 2026-11-01 15:21 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	RD3DM S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-04 15:05	40m	- / -17	RA3QM	-9 / -	2	✓ Closing fragment
11-04 13:51	40m	- / -	PD7BDN	-14 / -	4	Partial capture
11-04 13:49	40m	- / -	YL3ATJ	-12 / -	2	Partial capture
10-31 15:08	40m	- / -18	LZ26IPA	-8 / -	2	Partial capture
10-31 15:08	40m	-17 / -	F5OYA/P	- / -2	4	Partial capture
10-29 04:33	40m	-21 / +2	RZ4FWA	-20 / -	3	✓ Closing observed
10-28 14:49	40m	- / -	RL3QFY	-17 / -	2	✓ Closing fragment
10-27 15:42	40m	- / -6	EX7CQ	-15 / -	2	✓ Closing fragment
10-27 15:35	40m	- / -12	EW4DX	+9 / -	3	✓ Closing fragment
10-27 15:01	40m	- / -14	R6FMK	-10 / -	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
150915  -9 1292  RD3DM LZ26IPA -18
150930 -11 1535  F5OYA/P RD3DM R-04 (x2)
151200 -17 1206  EY7BP RD3DM KO85
151800 -20 1566  CQ RD3DM KO85
152100 -21 1755  RU4CK/P RD3DM KO85
134900 -11 1796  RD3DM YL3ATJ KO27 (x2)
135100 -15 1797  RD3DM PD7BDN JO22 (x4)
150345  -1 2113  RD3DM 6W/IK2HKT -20
150530  -7 1939  RD3DM RA3QM -17 (x2)

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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