SQ5CZJ — 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: Poland Most frequent locator attributed to this token: JO92

Receiver-side FT8 activity involving SQ5CZJ, decoded by SO8OO in southeastern Poland. 336 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 44 UTC dates in the available aggregate history. Observed between 2026-07-09 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 336 FT8 messages attributed to SQ5CZJ as the transmitting token by decoded message structure across 44 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (74%), followed by 80 m (23%) and 20 m (3%). The busiest six-hour window was 08:00-14:00 UTC, containing 48% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

336

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

80m · 77 40m · 249 20m · 10

First attributed message: 2026-07-09
Last attributed message: 2026-11-05 19:52 UTC

Observed FT8 message patterns

Attributed sample: 336 messages
Active dates: 44 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -17 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 51, moderate (-15 to -9 dB) 109, strong (≥ -8 dB) 176.

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 SQ5CZJ in decoded directed-looking exchanges:

SP4GDW · Poland ×5 R2FAQ · Kaliningrad ×2 SP4VIT · Poland ×2 SQ5OMY · Poland ×2 CR5VP · Portugal F5SFT · France F6DZU · France GM3DRA · Scotland HA1BF · Hungary R6OP · European Russia YO4NT · Romania 4O7CC · Montenegro

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 SQ5CZJ

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: JO92 · 238 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 345 km (approx.)
Last such locator decoded: 2026-11-05 19:52 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	SQ5CZJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-29 07:37	40m	-12 / -	NU1T	- / -	4	Partial capture
10-26 16:17	40m	- / -13	F5LPL	-15 / -	2	✓ Closing fragment
10-23 18:40	80m	-12 / -	SP5ROM	- / -3	2	Partial capture
10-23 18:31	80m	-2 / -	SP5ROM	- / -	3	Partial capture
10-22 18:38	80m	-10 / -	SP5ROM	- / 0	3	Partial capture
10-22 18:29	80m	-8 / -4	RA2FU	+3 / -	4	✓ Closing observed
10-22 18:21	80m	-9 / -	SP5ROM	- / +3	7	Partial capture
10-20 17:29	40m	-12 / -10	YO3YX	-4 / -13	4	✓ Full exchange observed
10-20 17:20	40m	-6 / -13	EX7CQ	+7 / -	4	Partial capture
10-20 17:13	40m	-2 / -	SP4GDW	- / -	8	Partial capture
10-18 09:41	40m	-12 / -	SP4WSL	-15 / +7	4	✓ Closing observed
10-18 09:38	40m	-14 / -12	HG8LXL	-2 / -	4	✓ Full exchange observed
10-18 09:24	40m	- / -	HG8LXL	-7 / -	3	Partial capture
10-18 09:18	40m	-15 / -6	SP4GDW	-17 / -13	11	✓ Full exchange observed
10-18 08:36	40m	-1 / -	VO1ACZ	- / -	6	Partial capture
10-17 11:53	40m	-19 / -	SP4GDW	- / -	2	Partial capture
10-17 11:43	40m	-12 / -	SP4GDW	- / -	9	Partial capture
10-16 09:44	40m	- / +6	HF5W	-6 / -	2	Partial capture
10-16 09:35	40m	-7 / -	SP4GDW	- / -22	7	Partial capture
10-14 07:57	40m	-14 / -	SP4GDW	- / -	7	Partial capture
10-09 12:21	40m	-19 / -10	SP4GDW	-18 / -9	4	✓ Full exchange observed
10-09 12:19	40m	-20 / -	SP4VIT	-14 / -4	4	✓ Closing observed
10-09 12:11	40m	- / -	SP4GDW	-16 / -	3	Partial capture
10-09 12:09	40m	-8 / -	TK4QP	- / -13	16	✓ Closing fragment
10-09 10:41	40m	- / -	S53AK	-8 / -	2	Partial capture
10-09 10:37	40m	-6 / -	7Z1WW	- / -	8	Partial capture
10-07 16:32	40m	- / -17	EX7CQ	-16 / -	2	✓ Closing fragment
10-05 18:51	80m	-1 / -	RK6OQ	- / -2	2	Partial capture
10-05 18:49	80m	-12 / -6	SP4VIT	+2 / +4	4	✓ Full exchange observed
10-05 13:04	40m	-12 / -	EX7CQ	- / -	12	Partial capture
09-30 08:29	40m	- / -	SP4GDW	-16 / -	5	✓ Closing fragment
09-30 08:14	40m	-4 / -1	SP4GDW	-10 / -	16	Partial capture
09-29 14:32	40m	-7 / -	UK8FCM	- / -	3	Partial capture
09-28 11:40	40m	- / -	PE9JAN	-15 / -	3	Partial capture
09-28 11:39	40m	-12 / -8	R2FAQ	-16 / -	5	✓ Full exchange observed
09-26 11:41	40m	-20 / -	SP5WZW	- / -	4	Partial capture
09-23 09:06	40m	-14 / -2	DL9KM	-3 / +4	6	✓ Full exchange observed
09-23 09:06	40m	- / -	DH6LS	+2 / -	3	Partial capture
09-23 09:05	40m	-18 / -9	SP4GDW	-15 / +10	4	✓ Full exchange observed
09-22 13:55	40m	-2 / -	RI1FJZ	- / -	2	Partial capture
09-22 13:50	40m	+2 / -	RI1FJZ	- / -	5	Partial capture
09-22 13:46	40m	-4 / -	ZA5G	- / -9	2	✓ Closing fragment
09-22 13:39	40m	-14 / -	OM8BCD	- / -	3	Partial capture
09-22 06:59	40m	-6 / -	KA1VDZ	- / -	2	Partial capture
09-22 06:50	40m	- / -	DL9KM	-4 / -	7	Partial capture
09-22 06:48	40m	-1 / -19	4O7CC	-4 / -2	5	✓ Full exchange observed
09-21 14:47	40m	-4 / -	RD0F	- / -	9	Partial capture
09-06 08:53	40m	-15 / +4	DL0MRR	-2 / +2	5	Partial capture
09-03 13:15	40m	-5 / -	OE8PIT	- / -	7	Partial capture
08-29 19:13	80m	-2 / -	EC5M	- / -	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
172045  -4  495  EX7CQ SQ5CZJ JO92
172100  +7  496  SQ5CZJ EX7CQ -13 (x2)
172900 -10 1442  YO3YX SQ5CZJ JO92
172915  -4 1443  SQ5CZJ YO3YX -10
172930 -14 1442  YO3YX SQ5CZJ R-13 (x2)
161745 -15 1238  SQ5CZJ F5LPL -13 (x2)
083030  -8 1015  F5PPN SQ5CZJ JO92
073700 -12 1253  NU1T SQ5CZJ JO92 (x4)
195200 -15 1169  EA9ADC SQ5CZJ JO92

80m

UTC    dB Audio  Message
182400  -7  858  SP5ROM SQ5CZJ R+00
182745  +3  635  SQ5CZJ R2EA/P KO85
182945  -8  508  RA2FU SQ5CZJ JO92
183100  +3  509  SQ5CZJ RA2FU -04 (x3)
183800 -10 1146  SP5ROM SQ5CZJ JO92 (x8)
201000 -24  892  JA9BFN SQ5CZJ JO92

20m

UTC    dB Audio  Message
065100  -6  958  SQ5CZJ F6DZU -03 (x3)
070400  -6 1268  SQ5CZJ RK4FF -03 (x4)
162645 -12 1276  SQ5CZJ CR5VP -11 (x2)
151345 -13  699  SQ5CZJ GM3DRA RR73
151715 -12 1280  SQ5CZJ F5SFT -10 (x3)
060630  +3 1741  SQ5CZJ YO4NT -16 (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

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee