RZ3DZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO85

Receiver-side FT8 activity involving RZ3DZ, decoded by SO8OO in southeastern Poland. 511 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 60 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-14.

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 511 FT8 messages attributed to RZ3DZ as the transmitting token by decoded message structure across 60 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (40%), followed by 40 m (29%) and 10 m (25%). The busiest six-hour window was 04:00-10:00 UTC, containing 46% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

511

Messages attributed

UTC dates decoded

153

Active 15-min windows

-16 dB

Estimated median S/N

Bands

80m · 31 40m · 147 20m · 204 10m · 129

First attributed message: 2026-06-07
Last attributed message: 2026-09-14 15:52 UTC

Observed FT8 message patterns

Attributed sample: 511 messages
Active dates: 60 UTC dates
Estimated median S/N: -16 dB
Estimated 10th-90th percentile: -24 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 267, moderate (-15 to -9 dB) 134, strong (≥ -8 dB) 110.

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 RZ3DZ in decoded directed-looking exchanges:

RT6O · European Russia ×2 RV3ZK · European Russia ×2 R9AE · Asiatic Russia ×2 UB0SMX/P · Asiatic Russia ×2 M0BEW · England R2EA · European Russia R3DEE · European Russia R3LCG · European Russia R3NBI · European Russia R4CR · European Russia R6AA · European Russia R6DOP · 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 RZ3DZ

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: KO85 · 345 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,193 km (approx.)
Last such locator decoded: 2026-09-14 15:51 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	RZ3DZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-14 15:49	40m	-13 / -	R1QF/P	- / -	3	✓ Closing fragment
09-14 05:16	40m	- / -17	DK100LH	-7 / -	2	Partial capture
09-14 05:11	40m	-20 / -5	RW3YS	+4 / -	4	✓ Closing observed
09-13 15:52	40m	-13 / -	R6HV/P	- / -	3	Partial capture
09-12 15:14	40m	- / -4	RA7E/P	-10 / -	2	✓ Closing fragment
09-12 15:08	40m	-20 / -	UB3ADO/P	- / -	2	✓ Closing fragment
09-10 16:01	40m	-18 / -	UB2FDL	- / -	2	Partial capture
09-08 18:10	40m	-11 / -	SA6DST	- / -	2	Partial capture
09-08 15:41	40m	-10 / -	R9OON	- / -7	5	✓ Closing fragment
09-08 15:39	40m	-12 / +7	RD7O	+10 / +4	5	✓ Full exchange observed
09-08 15:29	40m	-14 / -6	UB8CPH	-2 / -10	3	✓ Full exchange observed
09-06 15:47	40m	-16 / -1	UB3KGW	-10 / -7	3	✓ Full exchange observed
09-06 14:22	40m	-19 / -	RA3VMD	- / -13	3	✓ Closing fragment
09-05 04:13	40m	-18 / -	R3WDW/P	-2 / -	3	✓ Closing observed
09-05 04:11	40m	-18 / -	R4HLO/P	- / +1	2	Partial capture
09-05 04:09	40m	-12 / +1	R6ZGS	-9 / +7	4	✓ Full exchange observed
09-05 04:05	40m	-16 / -	R4HLO/P	- / -8	3	✓ Closing fragment
09-04 23:12	80m	-20 / -14	UA9CFH	-18 / -6	4	✓ Full exchange observed
09-03 03:54	40m	-17 / -8	R7OI	-12 / -15	3	Partial capture
09-02 15:34	40m	-3 / -	<...>	- / -	5	Partial capture
09-02 15:29	40m	-4 / -	RV9CX/0	- / -	8	Partial capture
09-02 15:20	40m	-5 / -	<...>	- / -	7	Partial capture
08-31 08:16	20m	+2 / -	<...>	- / -	2	Partial capture
08-30 04:11	40m	-16 / -2	RO6OP	-4 / -	5	✓ Full exchange observed
08-29 15:15	40m	- / -9	RL3DA	-5 / -	3	✓ Closing fragment
08-29 15:12	40m	-14 / -	R3NAW	- / -7	2	✓ Closing fragment
08-29 09:45	20m	-14 / -	RO6OP	- / -	4	Partial capture
08-29 09:38	20m	-4 / -	RM6OS	+9 / +1	3	✓ Closing observed
08-29 07:35	20m	-20 / -	RK9UN	- / 0	2	Partial capture
08-29 06:36	20m	- / -12	RD6OZ	-6 / -	2	✓ Closing fragment
08-29 04:14	40m	-9 / -	PV8AJ	- / -	3	Partial capture
08-29 04:11	40m	-7 / 0	R6OIZ	-8 / +1	6	✓ Full exchange observed
08-28 15:28	40m	-16 / 0	EU6UE	-6 / -1	5	✓ Full exchange observed
08-28 15:26	40m	-17 / -	UB8QBY	- / -20	3	✓ Closing fragment
08-28 00:06	20m	- / -12	PW8BR	+5 / -	3	✓ Closing fragment
08-27 18:08	40m	- / -6	R6OD	-13 / -	3	Partial capture
08-27 18:01	40m	-14 / -	R6OV	- / -	3	✓ Closing fragment
08-25 15:07	40m	-22 / -	R4YBG	- / -14	2	Partial capture
08-25 12:20	40m	- / -22	R2FDP/P	-17 / -	3	✓ Closing fragment
08-24 16:03	40m	-14 / -	R3DMK	- / -14	4	✓ Closing fragment
08-24 10:33	20m	-11 / -8	RA6ALD	-7 / -14	2	Partial capture
08-24 05:23	20m	-14 / -	UB8AHK	- / -8	3	Partial capture
08-24 05:21	20m	-19 / -	<...>	- / -12	3	Partial capture
08-22 04:29	20m	- / -15	CE2SQE	-12 / -	2	Partial capture
08-21 18:10	80m	-23 / -	UF4S/P	- / -	3	Partial capture
08-21 15:53	20m	- / -14	DM2DXA	+2 / -	3	✓ Closing fragment
08-21 14:10	40m	-21 / -	RA9YTI	- / -	3	Partial capture
08-20 18:22	40m	- / -4	UB2FEK	-10 / -	2	✓ Closing fragment
08-20 18:14	80m	- / -11	UB6OAJ	0 / -	2	✓ Closing fragment
08-20 18:12	80m	- / 0	R2PX	-6 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
155315 -13 1488  R6HV/P RZ3DZ KO85
155415 -14 1859  CQ RZ3DZ KO85                         a1
051115 -18 1515  RW3YS RZ3DZ KO85
051130  +5 1889  RZ3DZ RW3YS -05 (x2)
051215 -22 1516  RW3YS RZ3DZ 73
051600  -9 1941  RZ3DZ DK100LH -17 (x2)
142500 -14 1876  UB3PDB RZ3DZ KO85
142700 -23 1876  R4PFY RZ3DZ 73
143030 -23 1876  UB9MEU RZ3DZ R-11
154830 -12 1533  RW4NH RZ3DZ KO85
154930 -16 1533  R1QF/P RZ3DZ KO85 (x3)

80m

UTC    dB Audio  Message
181100 -21 1390  RZ3DZ R5VCR -14 (x2)
181245  -6  884  RZ3DZ R2PX +00 (x2)
181415  -4  493  RZ3DZ UB6OAJ -11 (x2)
181045 -24 1823  UF4S/P RZ3DZ KO85 (x3)
231230 -18 1263  RZ3DZ UA9CFH -14
231415 -19 1029  UA9CFH RZ3DZ R-06 (x3)
231945 -17 1904  CQ RZ3DZ KO85
232645 -24 1324  RA9YTI RZ3DZ KO85

20m

UTC    dB Audio  Message
000745  +5  465  RZ3DZ PW8BR RR73
145015 -17 1940  RD0L RZ3DZ 73
063615  -4 2168  RZ3DZ RD6OZ -12 (x2)
073530 -19 1926  RK9UN RZ3DZ KO85 (x2)
093845  -5 2469  RM6OS RZ3DZ KO85 (x2)
094100  +9 2719  RZ3DZ RM6OS RR73
094545 -13 2428  RO6OP RZ3DZ KO85 (x4)
081615  +2 1626  <...> RZ3DZ KO85 (x2)

10m

UTC    dB Audio  Message
084900 -22 1708  UA1COA RZ3DZ KO85 (x2)
085445 +11  490  RZ3DZ IK4LZH JN54 (x2)
093900  -9  593  RZ3DZ RT3K RR73
105915 -20 1103  RZ3DZ UA1AIR -14
134315 -18 1660  RZ3DZ RT6O +12 (x2)
144645 -18 1913  RZ5D RZ3DZ RR73
144700 -12  726  RZ3DZ RZ5D R+02
145700 -22 1841  RU3XK RZ3DZ KO85
155145  -8 2568  RZ3DZ R2EA RR73 (x2)
084700  +0  983  RZ3DZ RU7A +15 (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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