RZ3DUB — 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: KO96

Receiver-side FT8 activity involving RZ3DUB, decoded by SO8OO in southeastern Poland. 369 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 28 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-11-05.

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 369 FT8 messages attributed to RZ3DUB as the transmitting token by decoded message structure across 28 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (49%), followed by 20 m (22%) and 40 m (18%). Most decodes (85%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

369

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

160m · 181 80m · 18 40m · 66 20m · 81 10m · 23

First attributed message: 2026-06-09
Last attributed message: 2026-11-05 05:23 UTC

Observed FT8 message patterns

Attributed sample: 369 messages
Active dates: 28 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -21 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 148, moderate (-15 to -9 dB) 119, strong (≥ -8 dB) 102.

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 RZ3DUB in decoded directed-looking exchanges:

R5AV · European Russia ×2 RU4SS · European Russia ×2 EU7A · Belarus LB5WB · Norway LZ1ST · Bulgaria LZ2IP · Bulgaria LZ3YY · Bulgaria OH5KNL · Finland OH6RE · Finland R0CBI · Asiatic Russia R1MA · European Russia R1QBQ · 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 RZ3DUB

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: KO96 · 228 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,353 km (approx.)
Last such locator decoded: 2026-11-05 05:22 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	RZ3DUB S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-05 05:22	40m	-16 / -	OH1HBT	- / -19	2	✓ Closing fragment
11-05 05:20	40m	-16 / -	OA4ENG	- / -	2	Partial capture
11-05 05:15	40m	- / -4	R4FDK	-13 / -	2	Partial capture
11-05 05:15	40m	-11 / -	RL3QGD	-8 / -	4	✓ Closing observed
10-30 20:14	160m	-16 / -14	RV3V	-18 / -	4	✓ Closing observed
10-30 20:12	160m	-12 / -16	RZ3DX	+6 / -6	4	✓ Full exchange observed
10-30 20:10	160m	-18 / -10	UR4LRG	+9 / -3	5	✓ Full exchange observed
10-30 19:39	160m	- / -16	R5AV	-14 / -	3	✓ Closing fragment
10-30 19:26	160m	- / -4	UA3LID	+1 / -	3	✓ Closing fragment
10-28 15:56	40m	- / -	F5IXN	-22 / -	2	Partial capture
10-28 15:55	40m	- / +7	RA3X	-2 / -	8	✓ Closing fragment
10-28 15:49	40m	- / -6	R1CBW	-12 / -	2	✓ Closing fragment
10-24 19:53	40m	- / -	HB9VKL	-18 / -	10	Partial capture
10-24 19:51	40m	-1 / -	PD1HBL	-10 / -21	10	Partial capture
10-24 19:29	40m	- / -16	RN6MA	-1 / -	2	✓ Closing fragment
10-24 19:25	80m	-18 / -6	R6HV	-2 / -7	3	✓ Full exchange observed
10-24 19:20	80m	-14 / -	RA9SBN	- / -10	2	✓ Closing fragment
10-24 19:12	80m	- / -	S58T	+5 / -	4	Partial capture
10-24 19:06	80m	-18 / -	R4FDK	- / -13	2	✓ Closing fragment
10-24 19:06	80m	-15 / -	SP6FME	+4 / -16	4	Partial capture
10-24 19:04	80m	- / -6	UA3SCU	-9 / -	3	✓ Closing fragment
10-20 17:06	40m	-8 / -	9M2SWI	- / -	2	✓ Closing fragment
10-09 19:04	160m	-14 / -9	R5BS	+3 / -8	4	✓ Full exchange observed
10-09 19:01	160m	- / -12	RA5AD	+2 / -	2	✓ Closing fragment
10-09 18:57	160m	-13 / -18	RN1NEB	-20 / -24	6	✓ Full exchange observed
10-09 18:55	160m	-16 / -	RX6DA	- / -	2	Partial capture
10-09 18:48	160m	-15 / -12	LZ2IP	+18 / -2	5	✓ Full exchange observed
10-09 18:45	160m	-15 / -	RA4CFX	-24 / -5	2	✓ Closing observed
10-02 18:20	160m	-15 / -24	LB5WB	+3 / -15	5	✓ Full exchange observed
10-02 18:19	160m	- / -	UA3FH	-19 / -	2	Partial capture
10-02 18:19	160m	-18 / -6	RU4SS	-18 / -10	4	✓ Full exchange observed
10-02 18:17	160m	-18 / -11	R7KCK	-18 / -19	4	✓ Full exchange observed
10-02 18:14	160m	-15 / +1	R3ICU	-16 / -24	9	✓ Full exchange observed
10-02 18:11	160m	-16 / -2	R4WR	-12 / -5	4	Partial capture
10-02 18:09	160m	- / -	R3ICU	-18 / -	2	Partial capture
10-02 18:07	160m	-11 / -	LA9JKA	- / -	3	Partial capture
09-29 17:50	80m	-10 / -	OH6IH	- / -	2	Partial capture
09-29 17:48	80m	-10 / -	RA6UAR	- / -14	3	✓ Closing fragment
09-29 17:37	160m	- / -20	E73S	+4 / -	2	Partial capture
09-29 17:35	160m	- / -	R3ICU	-12 / -	2	Partial capture
09-29 17:32	160m	-22 / -	RA6ATZ	- / -18	2	Partial capture
09-29 17:25	160m	- / -18	LZ1ST	-6 / -	4	✓ Closing fragment
09-29 17:24	160m	- / -9	LZ3YY	-5 / -	3	✓ Closing fragment
09-24 18:03	160m	-12 / -	RW2Z	- / -	2	Partial capture
09-24 18:00	160m	-16 / -	UD8D	- / -14	2	Partial capture
09-24 17:57	160m	-14 / -	R3MDH	- / -	4	Partial capture
09-24 17:56	160m	-15 / -16	OH6RE	-4 / -	3	✓ Closing observed
09-24 17:53	160m	-19 / -12	RA3VX	-16 / -11	3	✓ Full exchange observed
09-24 17:51	160m	-22 / -	RX3VF	- / -10	3	✓ Closing fragment
09-24 17:46	160m	-22 / -11	RG7O	-6 / -7	4	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
155915  +1 2409  RZ3DUB RA3X 73
160015 -17 2175  RZ3DUB R4PFY -14
051500  -8 1024  RZ3DUB RL3QGD KO91 (x2)
051530 -12 1109  RZ3DUB R4FDK LO23
051545 -11 1025  RL3QGD RZ3DUB RR73
051600 -10 1024  RZ3DUB RL3QGD 73
051630 -14 1109  RZ3DUB R4FDK R-04
051800 -21 1025  RZ3DUB US1EA KN78
052015 -10 1024  R2AZK/1 RZ3DUB KO96
052045 -13 1024  OA4ENG RZ3DUB KO96 (x2)
052215 -18 1024  CQ RZ3DUB KO96
052245 -14 1024  OH1HBT RZ3DUB -19 (x2)

160m

UTC    dB Audio  Message
195800  +5 2593  RZ3DUB RR73; UK8AEA <...> -18
200945 -21 1001  R1QBQ RZ3DUB 73
201015 -19 1001  UR4LRG RZ3DUB KO96
201030 +13 2739  RZ3DUB UR4LRG -10
201045 -16 1001  UR4LRG RZ3DUB R-03
201100  +5 2739  RZ3DUB UR4LRG RR73
201115 -20 1001  UR4LRG RZ3DUB 73
201215  +7 1327  RZ3DUB RZ3DX -16
201230 -12 1001  RZ3DX RZ3DUB R-06
201245  +5 1327  RZ3DUB RZ3DX RR73
201300 -12 1001  RZ3DX RZ3DUB 73
201400 -13 1001  RV3V RZ3DUB KO96
201515 -20  916  RZ3DUB RV3V -14 (x2)
201630 -20 1001  RV3V RZ3DUB 73

80m

UTC    dB Audio  Message
191230  +4 2595  RZ3DUB S58T JN76 (x4)
191715 -15 1357  RA3TVW RZ3DUB RR73
191745 -14 1357  CQ RZ3DUB KO96
191830 -11 2199  RZ3DUB RX3AM KO85
192045 -13 1357  RA9SBN RZ3DUB R-10 (x2)
192215 -17 1357  CQ RZ3DUB KO96                        a1 (x3)
192530  -3 1078  RZ3DUB R6HV -06
192545 -18 1357  R6HV RZ3DUB R-07
192600  -2 1078  RZ3DUB R6HV RR73

20m

UTC    dB Audio  Message
172245  +2  896  UB0SMX/P RZ3DUB 73
172315  -2  896  BD4UJ RZ3DUB -17 (x4)
173015  +3  869  RI1FJL RZ3DUB KO96 (x6)
173415  -3  846  UT8IFE RZ3DUB -13
165300  +4 1312  YB6XFI RZ3DUB KO96
165730 -24 1186  9M2DGA RZ3DUB KO96 (x2)

10m

UTC    dB Audio  Message
140930 -15  980  RZ3DUB 5Z4VJ R-04

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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