R4DB — 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: LO22

Receiver-side FT8 activity involving R4DB, decoded by SO8OO in southeastern Poland. 2,555 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 87 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-11-03.

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 2,555 FT8 messages attributed to R4DB as the transmitting token by decoded message structure across 87 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (73%), followed by 80 m (27%). Most decodes (95%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13.6 dB.

Overview

2,555

Messages attributed

UTC dates decoded

320

Active 15-min windows

-13.6 dB

Estimated median S/N

Bands

80m · 692 40m · 1,863

First attributed message: 2026-06-06
Last attributed message: 2026-11-03 19:12 UTC

Observed FT8 message patterns

Attributed sample: 2,555 messages
Active dates: 87 UTC dates
Estimated median S/N: -13.6 dB
Estimated 10th-90th percentile: -22 to -3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,109, moderate (-15 to -9 dB) 633, strong (≥ -8 dB) 813.

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 R4DB in decoded directed-looking exchanges:

RA6OD · European Russia ×3 UA3PTY · European Russia ×3 9A2RI · Croatia ×2 9A3NM · Croatia ×2 9A7W · Croatia ×2 DG5PW · Fed. Rep. of Germany ×2 EW7LZ · Belarus ×2 IZ4AIF · Italy ×2 LY3BFH · Lithuania ×2 R6HV · European Russia ×2 RA3M · European Russia ×2 RZ6LY · European Russia ×2

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 R4DB

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: LO22 · 1,657 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,634 km (approx.)
Last such locator decoded: 2026-11-03 19:12 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	R4DB S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-03 19:11	80m	-17 / -	OZ1FHU	-6 / -7	4	✓ Closing observed
11-03 18:52	80m	- / -22	RC2DF	-15 / -	3	Partial capture
11-03 18:45	80m	- / -	R1CBK	-8 / -	2	Partial capture
11-03 18:45	80m	- / -13	R2DYN	-8 / -	2	Partial capture
11-03 18:41	80m	- / -15	RV3DBV	-8 / -	2	Partial capture
11-03 18:36	80m	-9 / -	RU3VT	-23 / -	2	✓ Closing observed
11-03 17:30	80m	- / -12	RD6OB	-16 / -	2	✓ Closing fragment
11-03 17:22	80m	- / -	RA6ALF	-10 / -	2	✓ Closing fragment
11-03 17:19	80m	- / -8	OH3AA	-17 / -	3	✓ Closing fragment
11-03 17:19	80m	-14 / -8	R1CL	-3 / -4	6	✓ Full exchange observed
11-03 17:18	80m	-12 / -11	RU3T	+1 / -	4	✓ Full exchange observed
11-03 17:16	80m	-16 / -7	RZ6LY	-8 / -	4	✓ Full exchange observed
11-03 17:13	80m	- / -4	R3AT	+7 / -	2	✓ Closing fragment
11-03 17:08	80m	-23 / -	R2PJ	-5 / -	3	✓ Closing observed
11-03 17:08	80m	-16 / -4	I8JPO	-10 / -11	7	✓ Full exchange observed
11-03 17:06	80m	-15 / +2	RU4I	+1 / +1	5	✓ Full exchange observed
11-03 17:04	80m	-15 / -	RK3AW/P	-10 / -	2	✓ Closing observed
11-03 17:04	80m	-15 / -	OH3AA	-14 / -6	3	Partial capture
11-03 17:01	80m	-14 / +2	RD5D	+5 / -	5	✓ Full exchange observed
11-02 19:38	80m	- / -	DO1OAS	-11 / -	2	Partial capture
11-02 19:36	80m	-19 / -12	DB2HA	+2 / -11	6	✓ Full exchange observed
11-02 19:27	80m	- / -8	R6FFB	+3 / -	3	✓ Closing fragment
11-02 19:25	80m	-14 / -	R3DAJ	- / -	2	✓ Closing fragment
11-02 19:24	80m	-14 / -	R3KCI	- / +5	2	✓ Closing fragment
11-01 18:27	40m	- / -18	9A5CW	+2 / -	3	✓ Closing fragment
11-01 18:14	80m	- / -12	RA3LCW	+6 / -	2	✓ Closing fragment
11-01 18:05	80m	- / -12	RA6ANN	-16 / -	2	Partial capture
11-01 17:55	80m	- / -10	R2PT	+4 / -	2	✓ Closing fragment
11-01 17:52	80m	- / -	IK3TZB	+11 / -	2	Partial capture
11-01 17:52	80m	- / -1	RA3ZAL	+2 / -	3	✓ Closing fragment
11-01 17:50	80m	- / -15	R7KKO	-14 / -	4	✓ Closing fragment
11-01 17:48	80m	- / -8	YO9HP	-1 / -	2	✓ Closing fragment
11-01 17:27	80m	- / -10	LY3BFH	+10 / -	2	✓ Closing fragment
11-01 17:26	80m	- / -10	R7KKO	-14 / -	5	Partial capture
10-30 15:36	80m	- / +5	RV4LD	-12 / -	2	Partial capture
10-30 15:36	80m	- / -	RY3D	+12 / -	2	Partial capture
10-30 15:32	80m	- / -	RY3D	+14 / -	3	Partial capture
10-30 15:29	80m	-13 / -	UA4SN	-17 / -	2	✓ Closing observed
10-30 15:28	80m	- / -	RY3D	+14 / -	2	Partial capture
10-30 15:23	80m	-17 / +4	R4CCE	-13 / -	4	✓ Full exchange observed
10-30 15:23	80m	- / -	RY3D	+15 / -	5	Partial capture
10-30 15:21	80m	-20 / -	R6ADH	- / -17	2	✓ Closing fragment
10-30 15:20	80m	-16 / -	RQ6B	- / -2	2	✓ Closing fragment
10-30 15:18	80m	- / -	RY3D	+7 / -	3	Partial capture
10-30 15:15	80m	- / -	R3MDJ	-10 / -	2	Partial capture
10-30 15:13	80m	-14 / -2	RO5A	-6 / -	6	✓ Full exchange observed
10-29 19:50	80m	- / -	DO5AX	-16 / -	2	Partial capture
10-29 19:47	80m	-20 / -	DL9KM	-2 / -19	3	✓ Closing observed
10-29 19:39	80m	-10 / -	RA3PDL	- / +4	2	✓ Closing fragment
10-29 19:35	80m	-10 / -	R1BQR	- / -14	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
184530  -6 1638  R4DB R2DYN -13
184530  -7 1685  R4DB R1CBK KO59 (x2)
185030 -24 1672  R4DB M0BEW -14
185230 -16 1671  R4DB RC2DF KO95 (x3)
190015 -23 1676  CQ R4DB LO22 (x2)
191000  +3 1502  R4DB SP1EG JO73
191130  -5 1721  R4DB OZ1FHU JO55
191145 -19 1721  OZ1FHU R4DB -07 (x2)
191230  -6 1721  R4DB OZ1FHU 73
191245 -17 1721  CQ R4DB LO22

40m

UTC    dB Audio  Message
170415 -10 1815  CQ R4DB LO22 (x2)
023600 -13 1819  R4DB F4BJN JN25 (x4)
175630  +3 1335  R4DB IK4TVP -14 (x4)
060145 -15 1739  R4DB R5AV +04 (x2)
182700  +1  567  R4DB 9A5CW JN65 (x3)

160m

UTC    dB Audio  Message
190615  -3 1269  R4DB RM5F KO85 (x15)

60m

UTC    dB Audio  Message
184530 -17 1900  R4DB DK7ZT -02 (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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