RZ3AV — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO75

Receiver-side FT8 activity involving RZ3AV, decoded by SO8OO in southeastern Poland. 395 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 30 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-05.

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 395 FT8 messages attributed to RZ3AV as the transmitting token by decoded message structure across 30 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (68%), followed by 20 m (20%) and 40 m (12%). Most decodes (82%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

395

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

80m · 267 40m · 48 20m · 78 10m · 2

First attributed message: 2026-06-08
Last attributed message: 2026-09-05 20:11 UTC

Observed FT8 message patterns

Attributed sample: 395 messages
Active dates: 30 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -23 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 176, moderate (-15 to -9 dB) 147, strong (≥ -8 dB) 72.

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 RZ3AV in decoded directed-looking exchanges:

R5AV · European Russia ×4 F1PBZ · France ×3 IQ4JO · Italy ×3 R9CS/P · European Russia ×2 R6ZEJ · European Russia ×2 RN6MA · European Russia ×2 RA6OD · European Russia ×2 UA3GJM · European Russia ×2 RW3QW · European Russia ON4ASV · Belgium TF4M · Iceland UC7T · 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 RZ3AV

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: KO75 · 276 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,081 km (approx.)
Last such locator decoded: 2026-09-05 20:11 UTC

Other locator fields attributed to this token: KO85 (6).

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	RZ3AV S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-05 20:14	40m	- / -9	T77R	0 / -	4	Partial capture
09-05 20:11	80m	-14 / -	R2UC	-12 / -	2	✓ Closing observed
09-05 20:05	40m	-18 / -	T77R	- / -	2	Partial capture
09-05 19:28	80m	-18 / -	RC2Y	+8 / -7	4	✓ Closing observed
09-05 19:25	80m	-16 / -16	RU3XK	+4 / -13	4	✓ Full exchange observed
09-05 17:23	80m	-10 / -15	UB1CCL	-1 / -1	5	✓ Full exchange observed
09-05 17:22	80m	-10 / +4	RA4CQW/P	-12 / -8	2	Partial capture
09-05 17:18	80m	-7 / -	SP100PKP	- / -1	2	Partial capture
08-31 09:26	20m	+7 / -6	OH0/ES2TT	-1 / -	4	Partial capture
08-31 09:25	20m	+5 / -	<...>	- / -	2	Partial capture
08-30 20:08	40m	- / -7	EW8AAC	-8 / -	2	Partial capture
08-30 17:12	80m	-21 / -	R9CS/P	- / -14	4	✓ Closing fragment
08-29 02:45	80m	-5 / -	PY5XT	- / -	3	Partial capture
08-28 20:06	80m	- / -	R2AL	+2 / -	3	Partial capture
08-28 20:05	80m	- / -2	RA3VMK/P	-24 / -	2	✓ Closing fragment
08-25 21:16	80m	-7 / -11	IQ4JO	+6 / -7	5	✓ Full exchange observed
08-25 21:14	80m	-12 / -7	R6ZEJ	-2 / -4	5	✓ Full exchange observed
08-25 21:08	80m	-12 / -3	<...>	-2 / -5	6	Partial capture
08-25 21:05	80m	-4 / -	R0BD	- / -	3	Partial capture
08-25 03:58	20m	- / -15	XQ1KK	-10 / -	2	✓ Closing fragment
08-24 20:56	40m	-8 / -	RU5A/M	- / -7	2	Partial capture
08-24 20:44	40m	+1 / -	R2EA/P	- / -	7	Partial capture
08-24 20:39	40m	-8 / -	R2EA/P	- / -	2	Partial capture
08-24 20:37	80m	-19 / -	D2UY	- / -	2	Partial capture
08-11 04:21	20m	- / -2	RV6F	-16 / -	2	Partial capture
08-11 04:15	20m	- / -11	R4FDK	-21 / -	2	✓ Closing fragment
08-09 22:08	80m	-20 / -	R5KH	-8 / -	3	✓ Closing observed
08-09 22:07	80m	- / -15	<...>	0 / -	2	Partial capture
08-09 22:03	80m	+4 / -15	R4SCQ	-14 / -11	3	✓ Full exchange observed
08-09 20:14	80m	-18 / -9	R8CW/4	-6 / -3	2	Partial capture
08-09 19:54	40m	-23 / -12	DL5MKR	-13 / -16	4	Partial capture
08-09 19:50	40m	- / -	DL5MKR	-17 / -	3	Partial capture
08-09 14:05	10m	- / -9	HG1DRC	-4 / -	2	✓ Closing fragment
08-08 21:02	80m	- / -16	F1PBZ	+4 / -	2	✓ Closing fragment
08-08 20:30	40m	- / -	DH5BM	-15 / -	2	✓ Closing fragment
08-08 20:21	40m	- / -	DH3KR	-22 / -	2	✓ Closing fragment
08-08 20:09	40m	- / -19	DL1SRS	-4 / -	2	✓ Closing fragment
08-08 20:05	40m	- / -10	PD2V	-2 / -	2	✓ Closing fragment
08-08 19:54	80m	-22 / -11	RT6Z	+11 / -	4	✓ Closing observed
08-08 19:54	80m	-24 / -17	RV6HE	-8 / -	3	✓ Closing observed
08-08 19:53	80m	-24 / -	R5AV	-1 / -	2	✓ Closing observed
08-08 19:51	80m	- / -8	OK1VK	+13 / -	2	✓ Closing fragment
08-08 16:12	40m	- / -12	UA3GDJ	-10 / -	3	✓ Closing fragment
08-08 14:16	20m	- / -10	PD1HPB	-6 / -	4	✓ Closing fragment
08-07 21:28	40m	- / +2	OZ5AGJ	-14 / -	2	✓ Closing fragment
08-07 21:22	40m	- / -5	SP0DF	-10 / -	2	✓ Closing fragment
08-07 21:17	80m	-14 / -24	DO1OAS	-2 / -15	3	Partial capture
08-07 21:13	80m	-14 / -7	TF4M	-18 / -	4	✓ Closing observed
08-07 21:10	80m	-11 / -17	SP7NC	+13 / -8	5	✓ Full exchange observed
08-07 21:09	80m	- / -12	DH5BM	-2 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
204530  -3 2541  R2EA/P RZ3AV KO75 (x4)
205615  -5 1251  RU5A/M RZ3AV KO75 (x2)
034615 -11 2439  OA4ENG RZ3AV KO75
200800  -4 1724  RZ3AV EW8AAC -07 (x2)
200530 -18 1844  T77R RZ3AV KO75 (x2)
201445  +2 1739  RZ3AV T77R -09 (x4)

80m

UTC    dB Audio  Message
172315 -11 2456  UB1CCL RZ3AV -01
172330  -1 1284  RZ3AV UB1CCL R-15
172345  -9 2456  UB1CCL RZ3AV RR73
172400  +0 1284  RZ3AV UB1CCL 73
181600 -19 1706  RA1N RZ3AV R-17
192515  +4 1980  RZ3AV RU3XK -16
192530 -15 1706  RU3XK RZ3AV R-13
192545  +5 1980  RZ3AV RU3XK RR73
192600 -16 1706  RU3XK RZ3AV 73
192830 -17 1706  RC2Y RZ3AV KO75 (x2)
192915  +8 1977  RZ3AV RC2Y RR73
192930 -20 1705  RC2Y RZ3AV 73
201145 -14 1410  R2UC RZ3AV KO75
201230 -12  198  RZ3AV R2UC RR73

20m

UTC    dB Audio  Message
042130 -19 1451  RZ3AV RV6F LN14 (x2)
042430 -12 2388  RZ3AV PD0RCQ JO21
171045 -19 2313  RZ3AV RA3RFT/1 -09
072500  +1 2628  RZ3AV R6DOB/M -15 (x2)
191215  -8 2633  DM2DXA RZ3AV 73
035830 -10 1820  RZ3AV XQ1KK -15 (x2)
092500  +3 2793  <...> RZ3AV KO75 (x2)
092600  +5 2792  <OH0/ES2TT> RZ3AV KO75
092615  -4 2873  RZ3AV OH0/ES2TT -06
092630  +9 2872  OH0/ES2TT RZ3AV KO75
092745  +2 2873  RZ3AV OH0/ES2TT -07

10m

UTC    dB Audio  Message
111945 -17 1141  RZ3AV R7DX R-20
082730 -19 2041  RZ3AV RN6MA -13 (x2)
080300  -8 2301  RZ3AV DL8WEM R-06 (x2)
080400  -5 2256  RZ3AV YO6LM -04 (x2)
080615 -20 2300  CQ RZ3AV KO75
144300 -21 1496  RZ3AV R6KEE KN75 (x2)
145445 -10 2646  CQ RZ3AV KO75
091330  -3 2288  RZ3AV R50RKZ -16
091400  -8 2289  RZ3AV RR73; HA6ZX <...> -14
140545  -8 2124  RZ3AV HG1DRC R-09 (x2)

60m

UTC    dB Audio  Message
192130  +6 2311  RZ3AV SP9UPH JO90 (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.

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