KB9ZM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM57

Receiver-side FT8 activity involving KB9ZM, decoded by SO8OO in southeastern Poland. 398 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 27 UTC dates in the available aggregate history. Observed between 2026-06-11 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 398 FT8 messages attributed to KB9ZM as the transmitting token by decoded message structure across 27 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (59%), followed by 60 m (22%) and 40 m (18%). Most decodes (94%) fell within the six-hour window 00:00-06:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

398

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

80m · 1 60m · 89 40m · 73 20m · 235

First attributed message: 2026-06-11
Last attributed message: 2026-09-19 03:56 UTC

Observed FT8 message patterns

Attributed sample: 398 messages
Active dates: 27 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -21 to -6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 163, moderate (-15 to -9 dB) 154, strong (≥ -8 dB) 81.

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 KB9ZM in decoded directed-looking exchanges:

F5RMK · France ×3 DL1UDO · Fed. Rep. of Germany ×2 K4YT · United States ×2 W0OVX · United States ×2 EC5M · Spain ×2 HB9EFK · Switzerland ×2 IV3DSG · Italy ×2 4Z1RZ · Israel 5B4AMX · Cyprus 5Z4VJ · Kenya 9A2AJ · Croatia 9A5AZK · Croatia

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 KB9ZM

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: EM57 · 143 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,169 km (approx.)
Last such locator decoded: 2026-09-19 03:56 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	KB9ZM S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 04:10	40m	- / -8	OT7K	-1 / -	2	✓ Closing fragment
09-19 04:02	40m	- / -	SV1MOZ	-8 / -	4	Partial capture
09-19 03:53	40m	- / -	UA4FKT	+7 / -	3	Partial capture
09-19 03:50	40m	-16 / -	KM4KDF	- / 0	3	✓ Closing fragment
09-19 02:40	60m	- / -2	F5RMK	-8 / -	2	✓ Closing fragment
09-19 02:37	60m	- / -10	M0UTD	-2 / -	3	✓ Closing fragment
09-19 02:33	60m	- / -11	LZ2JE	-10 / -	2	✓ Closing fragment
09-19 02:30	60m	- / +2	AC2PB	-12 / -	2	✓ Closing fragment
09-19 02:27	60m	- / -20	SV2KD	+14 / -	2	Partial capture
09-19 02:13	60m	- / -	DL7ACA	+11 / -	3	Partial capture
09-16 03:42	60m	- / +4	MI0NWA	+2 / -	4	✓ Closing fragment
09-16 03:40	60m	- / +2	F6ICX	+9 / -	2	✓ Closing fragment
09-15 05:30	40m	-21 / -	F4AHJ	-8 / -8	4	✓ Closing observed
09-15 05:27	40m	- / -	EU6KA	-8 / -	2	Partial capture
09-15 05:25	40m	-22 / -19	LY2MM	0 / -	2	Partial capture
09-15 05:18	40m	- / -1	M0DSK	-5 / -	3	✓ Closing fragment
09-15 05:17	40m	- / -	LZ3BS	+4 / -	2	Partial capture
09-15 04:59	80m	- / -	IV3GHY	+3 / -	2	Partial capture
09-15 04:58	80m	- / -	G0OYQ	-15 / -	3	Partial capture
09-15 04:54	80m	- / -	DO1FZL	0 / -	3	Partial capture
09-15 04:53	80m	- / -15	F6FTB	-1 / -	6	✓ Closing fragment
09-15 04:53	80m	- / -	PA3KUS	-6 / -	2	Partial capture
09-15 04:52	80m	- / -	OZ1BLP	-7 / -	4	Partial capture
09-15 04:51	80m	- / -	IV3GHY	+8 / -	4	Partial capture
09-15 04:50	80m	- / -	PE1NMM	-6 / -	2	Partial capture
09-15 04:49	80m	- / -	DN2FBG	-22 / -	2	Partial capture
09-15 04:49	80m	- / -2	DO1ID	+9 / -	8	Partial capture
09-15 04:49	80m	- / -	G0OYQ	-14 / -	4	Partial capture
09-15 04:46	80m	- / -	OZ1BLP	0 / -	4	Partial capture
09-15 04:44	80m	- / -5	DO1ID	+10 / -	3	Partial capture
09-15 04:44	80m	- / -	EA4EER	-12 / -	2	Partial capture
09-15 04:44	80m	- / -	PA3KUS	0 / -	2	Partial capture
09-15 04:42	80m	- / -8	ON7GB	+9 / -	3	✓ Closing fragment
09-15 04:41	80m	- / -5	HB9EFK	+2 / -	2	✓ Closing fragment
09-15 04:40	80m	- / -	PA3KUS	+8 / -	3	Partial capture
09-15 04:39	80m	- / -	G4ZFJ	+4 / -	4	Partial capture
09-15 04:38	80m	- / -15	DO1ID	+7 / -	7	Partial capture
09-15 04:36	80m	- / -	PA3KUS	-10 / -	2	Partial capture
09-15 04:31	80m	- / -	DL2RPN	-10 / -	2	Partial capture
09-15 04:31	80m	- / -	PA3KUS	-8 / -	5	Partial capture
09-15 04:29	80m	- / -16	ON1JP	-16 / -	2	Partial capture
09-15 03:56	60m	-17 / -21	EA5JKB	-13 / -11	4	✓ Full exchange observed
09-15 03:53	60m	- / -	IW3GXW	-11 / -	5	Partial capture
09-15 03:44	60m	-18 / -12	Z35T	+2 / -	3	✓ Closing observed
09-15 03:20	40m	- / -	SV1MOZ	0 / -	2	Partial capture
09-15 02:46	40m	-17 / -	W9MDM	- / +3	2	✓ Closing fragment
09-15 02:39	40m	- / -	4Z1GY	-24 / -	2	Partial capture
09-15 02:36	40m	-13 / -	N9JZN	- / -4	3	✓ Closing fragment
09-15 02:25	40m	-20 / -	R7DX	- / -	2	Partial capture
09-15 02:20	40m	-16 / -	WD8CZG	- / -	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
035015 -15 2240  KM4KDF KB9ZM EM57 (x3)
035215  -6 2962  KE7RAR KB9ZM EM57
035330  +7 2964  KB9ZM UA4FKT LO23 (x3)
035645 -19 1241  IK0QDM KB9ZM EM57
040245  -1  897  KB9ZM SV1MOZ KM17 (x4)
041015  -2 1543  KB9ZM OT7K -08 (x2)
214415 -10  372  KB9ZM N1IWP -08

60m

UTC    dB Audio  Message
034330  +2  720  KB9ZM MI0NWA RR73
021330 +12  620  KB9ZM DL7ACA JO40 (x3)
022745 +14  757  KB9ZM SV2KD -20 (x2)
023015 -13 2362  KB9ZM AC2PB +02 (x2)
023330 -10  902  KB9ZM LZ2JE -11 (x2)
023700 -13  629  KB9ZM M0UTD -10 (x3)
024030  -9 1937  KB9ZM F5RMK -02 (x2)

80m

UTC    dB Audio  Message
045415 +11  382  KB9ZM DO1ID -11
045415  -1 1002  KB9ZM DO1FZL JO50
045445  -3 2470  KB9ZM F6FTB R-09
045445 +15  382  KB9ZM DO1ID -11
045445  +0 1002  KB9ZM DO1FZL JO50
045515  -2 2470  KB9ZM F6FTB R-09
045515  +1 1002  KB9ZM DO1FZL JO50
045545  -1 2470  KB9ZM F6FTB R-11 (x2)
045815 -14  959  KB9ZM PA3KUS JO21
045815 -18  738  KB9ZM G0OYQ IO93
045945  -3 1002  KB9ZM IV3GHY JN65 (x2)
050015 -15  738  KB9ZM G0OYQ IO93 (x2)

20m

UTC    dB Audio  Message
193800 -12 1895  KB9ZM 9K2GR -14 (x2)
194115  +6 1755  KB9ZM IR7MGGC -14
014515 -18 1126  K7NEB KB9ZM 73
021415 -12  493  VE4ZIM KB9ZM 73
024245 -24 1873  KB9ZM UN7LAN -13
024345 -17 1066  KB9ZM PT7RF -19
171245  -4 1932  KB9ZM F5MXH JN07
184900  -5 1744  KB9ZM IU1CYA -19 (x2)
193300  -8 2815  K4YT KB9ZM R+22 (x2)
203545 -13 2207  KB9ZM KC1WIH +01
204000  -9  551  KB9ZM N5RJR +13 (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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