R3ZDU — 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: KO80

Receiver-side FT8 activity involving R3ZDU, decoded by SO8OO in southeastern Poland. 19 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-10-19 and 2026-10-22.

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 19 FT8 messages attributed to R3ZDU as the transmitting token by decoded message structure across 2 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 -12 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

40m · 19

First attributed message: 2026-10-19
Last attributed message: 2026-10-22 17:25 UTC

Observed FT8 message patterns

Attributed sample: 19 messages
Active dates: 2 UTC dates
Estimated median S/N: -12 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 7, strong (≥ -8 dB) 5.

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 R3ZDU in decoded directed-looking exchanges:

DK7ZT · Fed. Rep. of Germany R6KY · European Russia RM9WN · Asiatic Russia YO6LM · Romania

Most frequent locator attributed to R3ZDU

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: KO80 · 8 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,082 km (approx.)
Last such locator decoded: 2026-10-22 17:07 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	R3ZDU S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-22 17:14	40m	-14 / -	R6KY	-2 / -14	3	✓ Closing observed
10-22 17:12	40m	-14 / -	RM1O	- / -13	3	Partial capture
10-22 17:10	40m	-20 / +1	DK7ZT	-6 / -	7	✓ Full exchange observed
10-22 17:09	40m	-17 / -6	ON3URT	-7 / -15	2	Partial capture
10-19 19:46	40m	- / -10	HB9ELE	+14 / -	4	Partial capture
10-19 07:40	40m	-22 / -	SP9AUV	- / -	2	Partial capture
10-19 06:22	40m	- / -	F8MRQ	-6 / -	2	Partial capture
10-19 06:20	40m	-9 / -12	LZ1ZF	-4 / -	3	Partial capture
10-19 06:15	40m	- / +1	DK7ZT	-1 / -	3	Partial capture
10-19 01:52	40m	- / -	ON4KBU	-6 / -	3	Partial capture
10-19 00:09	40m	- / -	ON4KBU	-14 / -	2	Partial capture
10-19 00:05	40m	- / -6	PD0OTH	-16 / -	5	Partial capture
10-18 05:52	40m	- / -	RL3QGD	-6 / -	2	Partial capture
10-18 05:25	40m	- / -12	YO6LM	-8 / -	2	Partial capture
10-18 05:15	40m	- / -8	YO6LM	-3 / -	4	✓ Closing fragment
10-18 05:09	40m	- / -	RD3FY	-12 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
171030  -7 1105  R3ZDU R6DZR KN84
171045  -5 2488  R3ZDU DK7ZT +01 (x2)
171145 -20 1885  DK7ZT R3ZDU 73
171145  -7 2488  R3ZDU DK7ZT R+01 (x2)
171245 -15 1884  RM1O R3ZDU R-13
171245  -2 2488  R3ZDU DK7ZT R+01
171415 -12 1884  RM1O R3ZDU -06
171430 -11 1885  R6KY R3ZDU R-14 (x2)
171515 -15 1885  RM1O R3ZDU R-04
171600  -2 2007  R3ZDU R6KY 73
172400  -6 2884  RA9SOZ R3ZDU R-14
172530 -12 2883  RD0L R3ZDU R-17

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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