RA3ZH — 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: KO81

Receiver-side FT8 activity involving RA3ZH, decoded by SO8OO in southeastern Poland. 6,649 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 136 UTC dates in the available aggregate history. Observed between 2026-06-06 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 6,649 FT8 messages attributed to RA3ZH as the transmitting token by decoded message structure across 136 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (37%), followed by 40 m (36%) and 160 m (11%). Most decodes (68%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (72%); the estimated median was -4 dB.

Overview

6,649

Messages attributed

136

UTC dates decoded

1,094

Active 15-min windows

-4 dB

Estimated median S/N

Bands

160m · 730 80m · 608 40m · 2,419 20m · 2,443 10m · 449

First attributed message: 2026-06-06
Last attributed message: 2026-11-05 23:26 UTC

Observed FT8 message patterns

Attributed sample: 6,649 messages
Active dates: 136 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -14 to +6.4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 437, moderate (-15 to -9 dB) 1,406, strong (≥ -8 dB) 4,806.

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 RA3ZH in decoded directed-looking exchanges:

R7ZY · European Russia ×3 R80SAA · Asiatic Russia ×3 OK1DXR · Czech Republic ×2 ON6LEO · Belgium ×2 R3RRC/P · European Russia ×2 RI1FJZ · Franz Josef Land ×2 RN3TT · European Russia ×2 S57MPU · Slovenia ×2 SX2LGT · Greece ×2 A92AE · Bahrain ×2 EU1AFX · Belarus ×2 KH8WW · American Samoa ×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 RA3ZH

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: KO81 · 5,008 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,083 km (approx.)
Last such locator decoded: 2026-11-05 23:26 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	RA3ZH S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-05 23:26	40m	-17 / -	N1KV	- / -	2	Partial capture
11-05 23:23	40m	-11 / -	VA1MM	- / -	3	Partial capture
11-05 23:10	40m	-12 / -	ND1V	- / -20	4	✓ Closing fragment
11-05 22:31	40m	-2 / -	HL2OII	- / -	4	Partial capture
11-05 22:26	40m	-12 / -	YB1LIN	- / -	9	Partial capture
11-05 22:13	40m	-6 / -	DS2QCW	- / -	3	Partial capture
11-05 22:08	40m	-6 / -	HL2OII	- / -	3	Partial capture
11-05 22:01	40m	-7 / -	HL2OII	- / -	4	Partial capture
11-05 21:17	80m	-4 / 0	US8KA	+20 / 0	5	✓ Full exchange observed
11-05 21:13	80m	-10 / -13	ON6LEO	+4 / -10	6	✓ Full exchange observed
11-05 19:57	80m	-6 / -	DL40EUDXF	- / -	2	Partial capture
11-05 19:54	80m	-1 / +5	R7ZY	-6 / +3	5	✓ Full exchange observed
11-05 19:44	40m	- / -	EB3JT	-6 / -	3	Partial capture
11-05 18:52	40m	- / -	R6DZR	-12 / -	5	Partial capture
11-05 18:32	40m	-7 / 0	PC40EUDXF	+2 / -	2	Partial capture
11-05 18:29	40m	-4 / -	F4MXT/P	- / -	4	Partial capture
11-05 18:26	40m	-12 / -	GW0CLH/P	- / -	3	Partial capture
11-05 18:18	160m	-2 / -21	IZ8FWN	0 / -	3	Partial capture
11-05 18:12	160m	-4 / -18	IV3GHY	+9 / -22	7	✓ Full exchange observed
11-05 18:08	160m	- / -	RA3RDN	-13 / -	5	Partial capture
11-05 18:07	160m	+3 / -	OM3SX	- / -10	3	✓ Closing fragment
11-05 18:05	160m	-14 / -11	OZ5AGJ	-4 / -16	5	✓ Full exchange observed
11-05 18:03	160m	-1 / -10	RK3IT	-12 / -9	5	✓ Full exchange observed
11-05 18:00	160m	+6 / -	6W/IK2HKT	- / -	4	Partial capture
11-05 17:57	160m	-9 / -	JH1RES	- / -	2	Partial capture
11-05 17:56	160m	-5 / -13	OT4A	-3 / -	3	✓ Closing observed
11-05 17:54	160m	-5 / -12	ON6LEO	-2 / -8	5	✓ Full exchange observed
11-05 17:51	160m	+5 / -	EA3/F1UGD/P	- / -	3	Partial capture
11-05 17:45	160m	- / -18	UD8D	-15 / -	3	Partial capture
11-05 17:44	160m	-10 / -	UA9KBC	- / -	2	Partial capture
11-05 17:41	160m	- / -15	UD8D	-18 / -	4	Partial capture
11-05 17:40	160m	- / -	RZ6BS	-18 / -	3	Partial capture
11-05 17:40	160m	-8 / +7	S56P	+14 / -13	5	✓ Full exchange observed
11-05 17:31	160m	-16 / -	OH8FKK	- / -	2	Partial capture
11-05 17:23	160m	-4 / -	6W/IK2HKT	- / -	9	Partial capture
11-05 17:19	160m	+4 / -	UA9FFV	- / +3	2	✓ Closing fragment
11-05 17:19	160m	- / -15	UA1AEL	-7 / -	4	Partial capture
11-05 17:17	160m	-10 / -7	R1NI	-18 / -10	6	✓ Full exchange observed
11-05 17:15	160m	-9 / -6	EW6CY	-12 / -11	5	✓ Full exchange observed
11-05 17:15	160m	- / -	RW6MZ	-16 / -	3	Partial capture
11-05 17:15	160m	- / -	R6ML	-9 / -	2	Partial capture
11-05 17:11	160m	- / -	UA4PPQ	-9 / -	2	Partial capture
11-05 17:10	160m	-2 / -	UN0GY	- / -	8	✓ Closing fragment
11-05 16:23	40m	- / -	RD3FY	-1 / -	5	Partial capture
11-05 16:22	40m	0 / -	6W/IK2HKT	- / -11	2	Partial capture
11-05 16:20	40m	- / +3	UA3SCU	-6 / -	5	Partial capture
11-05 16:16	40m	-4 / -	ER1VRB	- / -17	8	✓ Closing fragment
11-05 16:15	40m	-3 / -	YL3ATJ	-10 / -7	5	✓ Full exchange observed
11-05 16:12	40m	+6 / -	HL2OII	- / -	3	Partial capture
11-05 16:11	40m	- / -	R1BDX	-4 / -	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
223345  +3 2896  HL2OII RA3ZH KO81 (x3)
231045 -14 1246  ND1V RA3ZH KO81 (x4)
231415  -7 2568  W4TV RA3ZH KO81
232145  -9  648  VE1JCC RA3ZH KO81
232215 -14  647  VO1III RA3ZH KO81
232315 -11  647  VA1MM RA3ZH KO81 (x3)
232615 -19 1338  N1KV RA3ZH KO81 (x2)

80m

UTC    dB Audio  Message
195645  -4 1017  W1AW/4 RA3ZH KO81
195715  -3 1807  DL40EUDXF RA3ZH KO81 (x2)
211345  -9 1227  ON6LEO RA3ZH KO81 (x2)
211530  +5 1227  RA3ZH ON6LEO -13
211545 -12 1282  ON6LEO RA3ZH R-10
211600  +2 1227  RA3ZH ON6LEO RR73
211615 -11 1282  ON6LEO RA3ZH 73
211700  +0  456  US8KA RA3ZH KO81
211715 +19  456  RA3ZH US8KA +00
211730  -6  456  US8KA RA3ZH R+00
211745 +21  456  RA3ZH US8KA RR73
211800  -7  456  US8KA RA3ZH 73
211815 -15 2777  RA3ZH R7KKO -04

160m

UTC    dB Audio  Message
181030 -15 2306  RA3ZH RA3RDN LO02 (x3)
181230  -1 2331  IV3GHY RA3ZH KO81 (x3)
181415  +7 2328  RA3ZH IV3GHY -18
181430  -7 2330  IV3GHY RA3ZH R-22
181445 +11 2328  RA3ZH IV3GHY RR73
181500 -16 2331  IV3GHY RA3ZH 73
181700 -17 1092  RA3ZH R9FF LO88
181815  -4 2044  IZ8FWN RA3ZH KO81 (x2)
181900  +0 1986  RA3ZH IZ8FWN -21
182000 -21 1092  RA3ZH R9FF LO88

10m

UTC    dB Audio  Message
090715  +6  378  <...> RA3ZH KO81 (x10)
112900 -14 1498  RA3ZH DN9AD JO52 (x4)
110730 -13 2539  RA3ZH V51WH +16

20m

UTC    dB Audio  Message
123545  -3 2938  <...> RA3ZH KO81
123615  -3 2938  <OH0/ES2TT> RA3ZH KO81 (x2)
173200 -11  278  BG5GEB RA3ZH KO81 (x4)
174945 -18 2308  RA3ZH BG5GEB -11 (x2)
175245 -17  855  TA3ZH RA3ZH KO81
184315  -8  630  <...> RA3ZH KO81 (x2)
201730 -11  755  K1WY RA3ZH KO81
201815  -8 1505  RA3ZH K1WY -25 (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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