SQ9CXH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: JO90

Receiver-side FT8 activity involving SQ9CXH, decoded by SO8OO in southeastern Poland. 691 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 44 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-07.

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 691 FT8 messages attributed to SQ9CXH 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 (91%), followed by 20 m (9%). The busiest six-hour window was 18:00-00:00 UTC, containing 43% of decodes. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (73%); the estimated median was -4 dB.

Overview

691

Messages attributed

UTC dates decoded

Active 15-min windows

-4 dB

Estimated median S/N

Bands

40m · 626 20m · 65

First attributed message: 2026-06-08
Last attributed message: 2026-09-07 12:16 UTC

Observed FT8 message patterns

Attributed sample: 691 messages
Active dates: 44 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -13 to +6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 21, moderate (-15 to -9 dB) 168, strong (≥ -8 dB) 502.

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 SQ9CXH in decoded directed-looking exchanges:

IK4LZH · Italy ×5 F1PBZ · France ×3 MW7GQB · Wales ×2 PA2KV · Netherlands ×2 YO4FZV · Romania ×2 PD2WL · Netherlands ×2 DA2DA · Fed. Rep. of Germany ×2 SQ9EJ · Poland ×2 F1IQH · France ×2 PD1RP · Netherlands ×2 UA1WA · European Russia KC5OCH · United States

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 SQ9CXH

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: JO90 · 475 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 208 km (approx.)
Last such locator decoded: 2026-09-07 12:16 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	SQ9CXH S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 22:04	40m	- / -15	S56SG	-6 / -	2	✓ Closing fragment
09-08 21:37	40m	- / -3	EA5JLN	-7 / -	2	✓ Closing fragment
09-08 21:36	40m	- / -3	EH1PDA	-9 / -	2	✓ Closing fragment
09-08 21:09	40m	- / -4	OH6B	-4 / -	2	✓ Closing fragment
09-08 21:06	40m	- / -18	SV8/F6BLP	0 / -	3	Partial capture
09-08 20:55	40m	- / -14	IW1GEU	+17 / -	2	✓ Closing fragment
09-08 20:52	40m	- / +8	M9PCX	-10 / -	2	Partial capture
09-08 20:49	40m	- / -11	LB5AK	-10 / -	2	✓ Closing fragment
09-08 20:46	40m	- / -6	RC6O	-15 / -	2	✓ Closing fragment
09-08 20:38	40m	- / -11	OE9NET	-11 / -	2	✓ Closing fragment
09-08 04:49	40m	- / -7	YO9CSM	0 / -	2	✓ Closing fragment
09-08 04:44	40m	- / -19	E79KO	-10 / -	3	✓ Closing fragment
09-08 00:26	40m	- / 0	R9LE	-7 / -	3	✓ Closing fragment
09-08 00:21	40m	- / -12	J38LD	-20 / -	2	✓ Closing fragment
09-07 12:15	40m	-3 / -	DK9EU	- / -	2	Partial capture
09-07 12:13	40m	0 / -	HA3HM	-19 / -7	5	✓ Full exchange observed
09-07 12:12	40m	+2 / -	PD4TK	- / -20	2	✓ Closing fragment
09-07 12:11	40m	-4 / -	DK5FN	- / -12	2	✓ Closing fragment
09-06 22:10	40m	- / +8	F5UTN	+12 / -	2	✓ Closing fragment
09-06 07:55	40m	0 / -14	RA3ZOM	-9 / -7	6	✓ Full exchange observed
09-06 07:51	40m	-4 / -10	SP8CDZ	-11 / -	3	Partial capture
09-06 07:49	40m	-1 / -	M6WRB	- / -	4	Partial capture
09-06 07:47	40m	0 / +8	SP1LIS	+5 / +8	5	✓ Full exchange observed
09-06 07:46	40m	0 / -	SP2TMT	- / -	2	Partial capture
09-06 07:45	40m	0 / -	SP2ALT	- / -	2	Partial capture
09-06 07:41	40m	0 / -	S55A	-11 / -5	6	✓ Closing observed
09-06 07:36	40m	0 / +8	OZ8MW/P	-12 / -8	9	✓ Full exchange observed
09-06 03:54	40m	- / -11	RN3ZBX	+9 / -	3	✓ Closing fragment
09-06 03:47	40m	- / -6	EA3HMM	+2 / -	3	✓ Closing fragment
09-06 01:17	40m	- / +1	LA1SFG/P	-5 / -	3	Partial capture
09-06 01:14	40m	- / -14	RD6OZ	+4 / -	2	Partial capture
09-06 01:12	40m	- / -8	OZ7KJ/P	+8 / -	2	✓ Closing fragment
09-06 01:07	40m	- / -5	SA3LEJ	-2 / -	2	✓ Closing fragment
09-06 01:05	40m	- / +4	G0OOD	-4 / -	2	Partial capture
09-06 00:59	40m	- / -2	SY1BKQ	-2 / -	2	Partial capture
09-05 05:32	40m	- / -4	HB9MEJ	+6 / -	2	✓ Closing fragment
09-05 05:28	40m	- / -5	RA1N	-6 / -	2	✓ Closing fragment
09-05 05:22	40m	- / -4	F4GYM/P	-7 / -	2	Partial capture
09-05 00:35	40m	- / 0	UB3KET	-12 / -	2	✓ Closing fragment
09-04 04:00	40m	+6 / -	R3KPI	- / -	6	Partial capture
09-04 03:57	40m	+7 / -	KK7UXY	- / -	5	Partial capture
09-03 22:43	40m	- / -8	IS0KNZ	-2 / -	4	Partial capture
09-03 18:59	40m	- / -13	IK4POB	-1 / -	4	Partial capture
09-03 18:56	40m	- / -16	E75BK	-12 / -	2	✓ Closing fragment
09-03 18:50	40m	- / -	F4LTP	-6 / -	2	✓ Closing fragment
09-03 18:47	40m	- / +6	UA2CZ	+3 / -	5	✓ Closing fragment
09-02 16:10	40m	-14 / -3	DF1IH	-10 / -2	5	✓ Full exchange observed
09-02 02:37	40m	- / -2	UR5AB	+4 / -	2	Partial capture
09-01 21:43	40m	- / +6	SV1TNK	-15 / -	2	✓ Closing fragment
09-01 21:30	40m	- / -4	G6LEE	0 / -	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
205245 -15  791  SQ9CXH M9PCX RRR
205515 +17 2675  SQ9CXH IW1GEU -14 (x2)
210215 -24 2032  SQ9CXH MM0DXL IO75
210630  +2  433  SQ9CXH SV8/F6BLP -18 (x3)
210915  -3  857  SQ9CXH OH6B -04 (x2)
213600 -11 2041  SQ9CXH EH1PDA -03 (x2)
213730  -7 1737  SQ9CXH EA5JLN -03 (x2)
220400  -6  784  SQ9CXH S56SG -15 (x2)

20m

UTC    dB Audio  Message
103300  -3 1027  SQ9CXH UA3SCU +13
103545  -5  904  SQ9CXH ER1SKI/P +14
103600 -18  774  ER1SKI/P SQ9CXH R+07
103615  -4  904  SQ9CXH ER1SKI/P RR73 (x2)
110215 -12 1039  SQ9CXH UA3THY +06 (x2)
110345  -5 1714  SQ9CXH RY2A +00 (x2)
113445  +1 1133  SQ9CXH DF1WR RR73
113545  -5  869  SQ9CXH G4MHJ -08 (x3)
162915  -2 1690  SQ9CXH <...> -07 (x2)

10m

UTC    dB Audio  Message
114345  -9  474  SQ9CXH DK7UY JO44
162730 -14 2053  SQ9CXH DO3HCS -11 (x5)
163500 -16 1444  SQ9CXH DN9AD JO52 (x3)
185145 -15  966  SQ9CXH DH6DAO JO41
093545  -7 2515  SQ9CXH ON5RZ -07 (x2)
093815  -9 1701  SQ9CXH DA2DA -19 (x3)

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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