RZ3BM — 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 RZ3BM, decoded by SO8OO in southeastern Poland. 61 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-09 and 2026-09-19.

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 61 FT8 messages attributed to RZ3BM as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (92%), followed by 80 m (8%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (61%); the estimated median was -14 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

80m · 5 40m · 56

First attributed message: 2026-07-09
Last attributed message: 2026-09-19 15:20 UTC

Observed FT8 message patterns

Attributed sample: 61 messages
Active dates: 5 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -18 to -9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 18, moderate (-15 to -9 dB) 37, strong (≥ -8 dB) 6.

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 RZ3BM in decoded directed-looking exchanges:

DJ0MAB · Fed. Rep. of Germany DK7UY · Fed. Rep. of Germany DL6EL · Fed. Rep. of Germany HA7TM · Hungary HG8LXL · Hungary OE8PIT · Austria ON2BCB · Belgium OZ6MM · Denmark R2BBT · European Russia R2EC · European Russia R2GBR · European Russia R2SN · 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 RZ3BM

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 · 27 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,193 km (approx.)
Last such locator decoded: 2026-09-19 15:20 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	RZ3BM S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 15:20	80m	-6 / -	UN7CL	- / -	2	Partial capture
09-09 17:51	40m	-13 / +3	RA4Y	-9 / +7	9	✓ Full exchange observed
09-09 17:51	40m	-12 / -	ON2BCB	-11 / -20	2	✓ Closing observed
09-08 17:48	40m	- / -	RK6OV	-4 / -	2	✓ Closing fragment
09-08 17:47	40m	- / -10	R2SN	+6 / -	6	✓ Closing fragment
09-08 17:38	40m	- / -17	S59A	+7 / -	3	✓ Closing fragment
09-08 17:37	40m	- / -10	HA7TM	+13 / -	3	✓ Closing fragment
09-08 17:34	40m	- / -1	UA3ON	-13 / -	2	✓ Closing fragment
09-08 17:32	40m	- / -	R6ML	+2 / -	2	Partial capture
09-08 17:31	40m	- / -9	SV2AEL	+6 / -	3	✓ Closing fragment
09-08 17:28	40m	-8 / -9	R3YAU	+4 / +5	3	Partial capture
09-08 16:28	40m	-18 / -	R9FDE	-6 / +6	2	Partial capture
09-08 16:26	40m	-16 / +1	R3GI	0 / -	4	✓ Full exchange observed
09-08 16:21	40m	-13 / -	R2GBR	-1 / +6	3	✓ Closing observed
09-08 16:19	40m	-8 / -7	R3WDW	+9 / -	6	✓ Closing observed
09-08 16:16	40m	-10 / -	R2BBT	- / -1	2	✓ Closing fragment
09-08 14:47	40m	- / -	RY3D	+5 / -	2	Partial capture
09-08 14:47	40m	-19 / -	RV4LD	+2 / -	5	Partial capture
09-08 05:22	40m	- / -	DH3KR	-12 / -	3	Partial capture
09-08 05:15	40m	- / -16	OZ6MM	-17 / -	4	✓ Closing fragment
09-08 05:05	40m	- / -15	DJ0MAB	-15 / -	3	✓ Closing fragment
09-07 18:43	40m	- / -3	R7KM	0 / -	3	✓ Closing fragment
09-07 18:40	40m	- / -13	UB3YGA	+7 / -	3	✓ Closing fragment
09-07 18:31	40m	-12 / +1	RZ5D	-8 / -13	4	✓ Full exchange observed
09-07 18:29	40m	-14 / -	IV3VFP	- / -	2	Partial capture
09-07 18:26	40m	-15 / -7	OE8PIT	+4 / -5	7	✓ Full exchange observed
09-07 18:26	40m	-14 / -5	RZ6AKF	+5 / -	6	✓ Closing observed
07-09 17:12	40m	-17 / -	R7MP	- / +9	2	✓ Closing fragment
07-09 17:11	40m	-16 / -	DK7UY	-22 / -12	3	✓ Closing observed
07-09 17:08	40m	-19 / -3	DL6EL	-11 / -	4	✓ Closing observed
07-09 17:07	40m	-16 / -	RA4HEV	- / -2	2	✓ Closing fragment
07-09 17:07	40m	-17 / -	R2EC	-3 / +1	5	✓ Closing observed
07-09 17:03	40m	- / -	R2EC	-6 / -	2	Partial capture
07-09 17:02	40m	-18 / -	HG8LXL	-9 / +1	2	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
151845 -12 2018  CQ RZ3BM KO85 (x3)
152015  -8 2018  UN7CL RZ3BM KO85 (x2)

40m

UTC    dB Audio  Message
175145 -10 1405  RZ3BM RA4Y LO35
175145 -11 2063  RZ3BM ON2BCB RR73
175215 -13 1404  RZ3BM RA4Y LO35 (x2)
175400 -10 2203  RA4Y RZ3BM +07
175515  -7 1404  RZ3BM RA4Y LO35
175530 -15 2203  RA4Y RZ3BM +02
175545  -7 1404  RZ3BM RA4Y R+03
175600 -14 2203  RA4Y RZ3BM RR73
175615 -10 1404  RZ3BM RA4Y 73
175630 -12 2203  CQ RZ3BM KO85 (x5)

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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