LZ1SJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Bulgaria Most frequent locator attributed to this token: KN32

Receiver-side FT8 activity involving LZ1SJ, decoded by SO8OO in southeastern Poland. 2,549 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 39 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-09-08.

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 2,549 FT8 messages attributed to LZ1SJ as the transmitting token by decoded message structure across 39 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (78%), followed by 20 m (14%) and 60 m (6%). Most decodes (90%) fell within the six-hour window 23:00-05:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

2,549

Messages attributed

UTC dates decoded

186

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 5 60m · 152 40m · 1,998 20m · 349 10m · 45

First attributed message: 2026-06-13
Last attributed message: 2026-09-08 04:13 UTC

Observed FT8 message patterns

Attributed sample: 2,549 messages
Active dates: 39 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -20 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 814, moderate (-15 to -9 dB) 814, strong (≥ -8 dB) 921.

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 LZ1SJ in decoded directed-looking exchanges:

F1IQH · France ×4 IZ5FSO · Italy ×3 KA5PUD · United States ×2 EA3AKY · Spain ×2 CT2GQA · Portugal ×2 SP5KG · Poland ×2 F4FPR · France ×2 IZ0AIO · Italy ×2 DD6WF · Fed. Rep. of Germany ON1DGN · Belgium 8S2C · Sweden OE6TXW · Austria

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 LZ1SJ

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: KN32 · 2,175 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 918 km (approx.)
Last such locator decoded: 2026-09-08 04:13 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	LZ1SJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 04:12	40m	-4 / -	M7CLI	- / -19	3	✓ Closing fragment
09-08 04:10	40m	- / -20	LZ1ON	-17 / -	2	Partial capture
09-08 03:53	40m	-3 / -	PD2WL	- / -18	3	✓ Closing fragment
09-08 03:43	40m	-6 / -	SN40KZE	- / -13	2	Partial capture
09-08 03:41	40m	-3 / -	KE4SCJ	- / -9	3	✓ Closing fragment
09-08 03:38	40m	-2 / -	5Q1X	- / -8	2	✓ Closing fragment
09-08 03:31	40m	- / -16	HK3AB	-24 / -	3	Partial capture
09-08 03:28	40m	- / -13	HK3AB	-24 / -	2	Partial capture
09-08 03:17	40m	-5 / -	IW2IDB	- / -17	8	Partial capture
09-06 03:05	40m	- / -12	WB8BPU	-8 / -	2	Partial capture
09-06 03:03	40m	- / -3	8S2C	-8 / -	3	✓ Closing fragment
09-06 02:39	40m	- / -13	WB8BPU	-17 / -	2	Partial capture
09-06 02:33	40m	- / -13	WB8BPU	-14 / -	3	Partial capture
09-06 02:20	40m	- / -	RW6MMU	-4 / -	4	Partial capture
09-06 01:10	40m	- / -15	K0IDX	-22 / -	2	✓ Closing fragment
09-06 01:08	40m	-10 / -	W4UCK	- / -13	2	✓ Closing fragment
09-06 01:03	40m	-21 / -9	LA4O	-11 / -	4	✓ Closing observed
09-06 00:51	40m	- / -	M0PFX	-19 / -	2	Partial capture
09-06 00:44	40m	-17 / -2	RD6OZ	0 / +1	5	✓ Full exchange observed
09-06 00:30	40m	-22 / -14	G7EVY	-6 / -11	5	✓ Full exchange observed
09-06 00:02	40m	-10 / -21	KK2M	-18 / -23	4	✓ Full exchange observed
09-06 00:00	40m	-4 / -	OZ8MW/P	- / 0	2	Partial capture
09-05 23:52	40m	-4 / -	SV9QWC	- / -7	2	✓ Closing fragment
09-05 23:51	40m	-4 / -	OZ8MW/P	- / +1	2	Partial capture
09-05 23:44	40m	-10 / -	EU1KI	- / -16	2	✓ Closing fragment
09-05 23:38	40m	-8 / +6	OZ8MW/P	-1 / -8	4	✓ Full exchange observed
09-05 23:35	40m	-4 / -1	OU7K/P	+16 / -10	5	✓ Full exchange observed
09-05 23:29	40m	- / -	OU7M/P	+4 / -	3	Partial capture
09-05 23:26	40m	-8 / -	OK1MDX	- / 0	2	✓ Closing fragment
09-05 23:23	40m	- / -	OU7M/P	+9 / -	3	Partial capture
09-05 23:22	40m	-8 / -10	LA8G	-6 / -7	3	✓ Full exchange observed
09-05 23:10	40m	-7 / -	IU5VLR	-12 / -11	3	✓ Closing observed
09-05 23:05	40m	-10 / -	UB4HVA	- / -11	2	✓ Closing fragment
09-05 22:59	40m	- / -	PA0KGB	0 / -	5	Partial capture
09-05 22:58	40m	-10 / -	TA2ED	- / -17	2	✓ Closing fragment
09-05 22:56	40m	+3 / -	ON1DGN	- / -16	2	✓ Closing fragment
09-05 03:48	40m	-10 / -	NE9U	- / -19	2	✓ Closing fragment
09-05 03:22	60m	- / -	F4FHW	-8 / -	5	Partial capture
09-05 03:15	60m	+4 / -	NP3RK	- / -19	2	✓ Closing fragment
09-05 03:14	60m	- / -	DK6AH	-18 / -	4	Partial capture
09-05 03:10	60m	+2 / -7	F1IQH	-9 / -7	5	✓ Full exchange observed
09-02 03:33	40m	+3 / -3	IZ5FSO	-3 / -	4	✓ Closing observed
09-02 03:12	40m	+5 / -5	RX3DCZ	-7 / -12	5	✓ Full exchange observed
09-02 03:05	40m	-16 / -8	R4OF	-9 / -	4	✓ Closing observed
09-02 01:00	40m	- / -2	EA1AOC	-6 / -	2	✓ Closing fragment
09-01 03:16	40m	+6 / -	ON2VHF/P	- / -17	2	✓ Closing fragment
09-01 02:51	60m	+6 / -	CT2GQA	-17 / -12	3	✓ Closing observed
08-31 03:42	40m	- / -24	F4JZW	+1 / -	16	Partial capture
08-31 03:34	40m	- / -	RA6ATZ	-7 / -	3	Partial capture
08-29 08:30	20m	- / -	IK4LZH	+10 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
040730  -5 2155  CQ LZ1SJ KN32 (x6)
041015 -17 2102  LZ1SJ LZ1ON -20
041030 -14 2155  CQ LZ1SJ KN32
041045 -17 2102  LZ1SJ LZ1ON -20
041100  -4 2155  CQ LZ1SJ KN32 (x2)
041200  -1 2155  M7CLI LZ1SJ R-19 (x3)
041330  -5 2155  CQ LZ1SJ KN32

60m

UTC    dB Audio  Message
031730  +3 1162  CQ LZ1SJ KN32 (x4)
031915 -18 1872  LZ1SJ DK6AH JN48
031930  +7 1162  CQ LZ1SJ KN32 (x4)
032215 -16 1809  LZ1SJ DK6AH JN48
032215 -11 1160  LZ1SJ F4FHW IN96 (x5)

20m

UTC    dB Audio  Message
045730  -8 1766  CQ LZ1SJ KN32 (x10)
083015 +13  463  LZ1SJ IK4LZH JN54 (x4)
101445  -7 1164  CQ LZ1SJ KN32

80m

UTC    dB Audio  Message
030730 -14  987  CQ LZ1SJ KN32 (x5)
031245  +5  404  LZ1SJ IK4LZH JN54 (x9)

10m

UTC    dB Audio  Message
092615  -4 1052  LZ1SJ M0BEW -16 (x5)
094815 -10 1050  LZ1SJ DG5PW JO30 (x5)
143130 -14  986  LZ1SJ OD5JL -09
143615  -7 2701  LZ1SJ IQ4JO JN63 (x3)
150300 -16 1050  CQ LZ1SJ KN32

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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