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. 540 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 37 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-10-05.

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 540 FT8 messages attributed to KB9ZM as the transmitting token by decoded message structure across 37 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (44%), followed by 40 m (37%) and 60 m (18%). Most decodes (96%) 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 -14.4 dB.

Overview

540

Messages attributed

UTC dates decoded

134

Active 15-min windows

-14.4 dB

Estimated median S/N

Bands

80m · 7 60m · 99 40m · 199 20m · 235

First attributed message: 2026-06-11
Last attributed message: 2026-10-05 02:26 UTC

Observed FT8 message patterns

Attributed sample: 540 messages
Active dates: 37 UTC dates
Estimated median S/N: -14.4 dB
Estimated 10th-90th percentile: -21 to -6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 232, moderate (-15 to -9 dB) 207, strong (≥ -8 dB) 101.

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:

EA3AKY · Spain ×3 F5RMK · France ×3 PF7DKW · Netherlands ×3 K4YT · United States ×2 W0OVX · United States ×2 DL5DQZ · Fed. Rep. of Germany ×2 EC5M · Spain ×2 G6PWS · England ×2 HB9EFK · Switzerland ×2 IV3DSG · Italy ×2 F6FTB · France ×2 DL3IAE · Fed. Rep. of Germany

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 · 203 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,169 km (approx.)
Last such locator decoded: 2026-10-01 02:11 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
10-17 06:07	80m	- / -	DO8JB	-12 / -	4	Partial capture
10-17 06:04	80m	- / -	DM2GG	+8 / -	2	Partial capture
10-17 05:21	40m	- / -17	IZ0BTV	+3 / -	2	✓ Closing fragment
10-17 04:29	40m	- / -18	Z35Z	-7 / -	2	Partial capture
10-17 03:45	60m	- / -	OE5DML	0 / -	2	Partial capture
10-17 03:39	60m	- / -	SV2BWY	-1 / -	3	Partial capture
10-17 03:37	60m	- / -	OE5DML	-1 / -	2	Partial capture
10-17 02:17	60m	- / -	SP1ZMO	-5 / -	3	Partial capture
10-13 04:08	40m	- / -13	TA2VUZ	-10 / -	6	Partial capture
10-07 06:33	80m	- / -	G0OIL	-6 / -	4	Partial capture
10-07 06:30	60m	- / -	DH1BBO	-16 / -	6	Partial capture
10-07 06:27	40m	- / -	F4NJT	-14 / -	4	Partial capture
10-07 06:27	40m	- / -4	F4FQY	-6 / -	2	✓ Closing fragment
10-07 06:06	40m	- / -	M0IEP	-22 / -	3	Partial capture
10-07 05:52	60m	- / -	I0TPU	-10 / -	4	Partial capture
10-07 05:51	60m	- / -	DC0ED	-19 / -	2	Partial capture
10-07 05:47	60m	- / -	DC0ED	-13 / -	2	Partial capture
10-07 05:46	60m	- / -	F6FTB	-12 / -	2	Partial capture
10-07 05:46	60m	- / -	M0GDX	-11 / -	5	Partial capture
10-07 05:46	60m	- / -	DG1KFR	-5 / -	6	Partial capture
10-07 05:39	60m	- / -10	HB9EFK	+2 / -	2	✓ Closing fragment
10-07 05:37	60m	- / -5	EA3AKY	-12 / -	2	✓ Closing fragment
10-07 05:35	60m	- / -	F4HSB	-18 / -	3	Partial capture
10-07 05:34	60m	- / -1	F1ABL	-12 / -	2	✓ Closing fragment
10-07 05:33	60m	- / -5	F5OZC	-10 / -	2	✓ Closing fragment
10-07 05:17	80m	- / -	F5RAV	-8 / -	2	Partial capture
10-07 05:16	80m	- / -	ON4UW	-7 / -	7	Partial capture
10-07 05:15	80m	- / -	IZ8KVW	-16 / -	3	Partial capture
10-07 05:12	80m	- / -	SM3ULU	-20 / -	3	Partial capture
10-07 05:09	80m	- / -	SP2GCJ	+6 / -	3	Partial capture
10-07 05:07	80m	- / -	HB9CYT	-6 / -	3	Partial capture
10-07 04:55	80m	- / -	F5RAV	+4 / -	2	Partial capture
10-07 04:55	80m	- / -	S57BTI	+12 / -	2	Partial capture
10-07 04:44	80m	- / -	ON4UW	+7 / -	2	Partial capture
10-06 06:04	40m	- / -	DJ2CR	-6 / -	5	Partial capture
10-05 03:19	40m	- / -	OK1DXR	+1 / -	3	Partial capture
10-05 01:55	60m	- / -15	ON1JP	-24 / -	3	Partial capture
10-04 05:47	40m	- / -	YL3VN	0 / -	2	Partial capture
10-04 05:42	40m	- / -	DL2RPN	-4 / -	4	Partial capture
10-03 05:46	80m	- / -1	F4MTU	-3 / -	2	✓ Closing fragment
10-03 05:44	80m	- / -	DH9DR	-2 / -	2	Partial capture
10-03 05:40	80m	- / -	F4LZZ	-8 / -	3	Partial capture
10-03 05:37	80m	- / -13	G0BLB	-3 / -	2	✓ Closing fragment
10-03 05:26	80m	- / -10	G4HCC	-15 / -	2	Partial capture
10-03 05:25	80m	- / +1	WA1J	+4 / -	2	✓ Closing fragment
10-03 05:20	80m	- / -	DL2AXA	-11 / -	3	Partial capture
10-03 05:20	80m	- / -	DO4DXA	+7 / -	6	Partial capture
10-03 05:18	80m	- / -	E77EA	+4 / -	2	Partial capture
10-03 05:18	80m	- / -	MW7TTA	-20 / -	2	Partial capture
10-03 05:15	80m	- / -	DO4DXA	+8 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
051730  -7 1183  KB9ZM F5RAV JN09
051800  -5 1356  KB9ZM ON4UW JO20 (x3)
063345  -8  435  KB9ZM G0OIL JO03 (x4)
062330  -6 1766  KB9ZM EA1DR -04
060415  +7 2239  KB9ZM DM2GG JO51 (x2)
060745 -14 1196  KB9ZM DO8JB JO32 (x4)

40m

UTC    dB Audio  Message
040845 -11 1835  KB9ZM TA2VUZ -13 (x5)
041845  -8  477  KB9ZM IU5LQC -05
042600  -9 2100  KB9ZM Z35Z -16 (x3)
044245  -1 1988  KB9ZM RA6OB KN98
050900 -15 1495  KB9ZM IZ8GUU RR73
052115  +1 1970  KB9ZM IZ0BTV -17 (x2)
055430  -8 1537  KB9ZM EA1SA +04 (x2)

60m

UTC    dB Audio  Message
063115 -15 1534  KB9ZM DH1BBO JO42 (x4)
021745  -2  393  KB9ZM SP1ZMO JO73 (x3)
033715  -3 2751  KB9ZM OE5DML JN78 (x2)
033900  +1 2383  KB9ZM SV2BWY KN10 (x3)
034530  +2 2667  KB9ZM OE5DML JN78 (x2)
041730  +1 2192  KB9ZM SV2BWY KN10

160m

UTC    dB Audio  Message
045000 +18 2503  KB9ZM ON4IQ JO20
045300 -24 1610  KB9ZM G0BLB IO81 (x2)
045445 -21 2147  KB9ZM F1PBZ -18
045445 +15 2796  KB9ZM DG0OBU -17
045515 -19 2147  KB9ZM F1PBZ -18
045515  +5 2796  KB9ZM DG0OBU -17 (x4)
050530  +5 2654  KB9ZM DL3IAE -21
050600  +9 1517  KB9ZM OK1PI JN79
050600 +13 2654  KB9ZM DL3IAE RR73
050630  +8 1517  KB9ZM OK1PI JN79 (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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