R3DFU — 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: KO95

Receiver-side FT8 activity involving R3DFU, decoded by SO8OO in southeastern Poland. 27 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-17 and 2026-10-21.

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 27 FT8 messages attributed to R3DFU as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (48%), followed by 40 m (26%) and 20 m (26%). Most decodes (63%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (70%); the estimated median was -20 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-20 dB

Estimated median S/N

Bands

80m · 13 40m · 7 20m · 7

First attributed message: 2026-06-17
Last attributed message: 2026-10-21 01:44 UTC

Observed FT8 message patterns

Attributed sample: 27 messages
Active dates: 7 UTC dates
Estimated median S/N: -20 dB
Estimated 10th-90th percentile: -24 to -14 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 19, moderate (-15 to -9 dB) 8, strong (≥ -8 dB) 0.

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 R3DFU in decoded directed-looking exchanges:

OH5KNL · Finland RA3VX · European Russia RA6FC · European Russia RK1N · European Russia RM5F · European Russia RN1NEB · European Russia RW3DC · European Russia LZ2WP · Bulgaria R4ADJ · European Russia RA6FCU · European Russia RM7M · European Russia DK7ZT · Fed. Rep. of Germany

Most frequent locator attributed to R3DFU

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: KO95 · 14 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,309 km (approx.)
Last such locator decoded: 2026-10-20 16:00 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	R3DFU S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-22 17:09	160m	- / -8	RK1N	-12 / -	2	✓ Closing fragment
10-22 14:55	40m	- / -11	R4ADJ	-10 / -	2	✓ Closing fragment
10-21 18:53	40m	- / -18	PH3T	+7 / -	4	Partial capture
10-21 17:14	160m	- / -18	RM5F	-7 / -	3	✓ Closing fragment
10-21 01:44	80m	-24 / -6	R4UA	+7 / +1	4	✓ Full exchange observed
10-21 01:43	80m	- / -19	RN3YN	-8 / -	2	✓ Closing fragment
10-21 01:42	80m	- / -13	RX3ASQ	-2 / -	3	✓ Closing fragment
10-21 01:40	80m	-24 / -21	DK7ZT	+9 / -5	5	✓ Full exchange observed
10-21 01:38	80m	-24 / +1	RY4D	-12 / 0	3	✓ Full exchange observed
10-21 01:13	160m	- / -20	RA6FC	-12 / -	7	✓ Closing fragment
10-20 16:03	40m	- / -7	RM7M	-14 / -	2	✓ Closing fragment
10-20 15:59	40m	-20 / -12	R6YG	-15 / -	3	Partial capture
10-20 15:58	40m	- / -10	LZ2WP	+11 / -	3	✓ Closing fragment
10-20 15:35	40m	- / -11	R7CA/6	-16 / -	2	Partial capture
10-16 17:56	160m	- / -13	RW3DC	-10 / -	2	✓ Closing fragment
07-25 15:54	40m	- / -18	RA6FCU	-12 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
175645  -9 1618  R3DFU RW3DC RR73
172000 -22 1398  R3DFU RN1NEB RR73
172215  -9 1179  R3DFU RK4FD -08
011345  -6  951  R3DFU RA6FC -20 (x7)
171430  -8  783  R3DFU RM5F KO85 (x3)
170900 -12 1686  R3DFU RK1N -08 (x2)

40m

UTC    dB Audio  Message
155800 +11 2484  R3DFU LZ2WP -10 (x3)
155915 -19 1399  R6YG R3DFU KO95 (x2)
160015 -21 1398  R4PFY R3DFU KO95
160100 -15 2168  R3DFU R6YG -12
160300 -12  684  R3DFU RM7M -07 (x2)
185300  +7 2529  R3DFU PH3T -18 (x4)
145545 -12 2346  R3DFU R4ADJ -11 (x2)

80m

UTC    dB Audio  Message
014000  +7  825  R3DFU DK7ZT -21 (x2)
014045 -24 1363  DK7ZT R3DFU R-05
014100  +9  825  R3DFU DK7ZT RR73
014115 -24 1363  DK7ZT R3DFU 73
014200  -5 1109  R3DFU RX3ASQ KO95
014200  -8 1364  R3DFU R4FDK LO23
014230  +2 1109  R3DFU RX3ASQ R-13 (x2)
014330 -11  700  R3DFU RN3YN -19 (x2)
014430  +5 2526  R3DFU R4UA LO24
014445 -24 1363  R4UA R3DFU +01
014500  +6 2525  R3DFU R4UA R-06 (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

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