HB9CEX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Switzerland Most frequent locator attributed to this token: JN47

Receiver-side FT8 activity involving HB9CEX, decoded by SO8OO in southeastern Poland. 1,284 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 59 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-20.

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 1,284 FT8 messages attributed to HB9CEX as the transmitting token by decoded message structure across 59 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (53%), followed by 20 m (31%) and 80 m (8%). Most decodes (64%) fell within the six-hour window 05:00-11:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (70%); the estimated median was -5 dB.

Overview

1,284

Messages attributed

UTC dates decoded

270

Active 15-min windows

-5 dB

Estimated median S/N

Bands

160m · 7 80m · 107 40m · 679 20m · 400 10m · 91

First attributed message: 2026-06-06
Last attributed message: 2026-09-20 08:36 UTC

Observed FT8 message patterns

Attributed sample: 1,284 messages
Active dates: 59 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -12 to +5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 32, moderate (-15 to -9 dB) 351, strong (≥ -8 dB) 901.

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 HB9CEX in decoded directed-looking exchanges:

EG5DX · Spain ×2 OK1UOZ · Czech Republic ×2 DB9LG · Fed. Rep. of Germany ×2 DL4MFC · Fed. Rep. of Germany ×2 OZ6MM · Denmark ×2 5Z4VJ · Kenya CA7FKZ · Chile CU6NS · Azores DN9AD · Fed. Rep. of Germany DN9KL · Fed. Rep. of Germany DN9SGE · Fed. Rep. of Germany DO5HOK · 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 HB9CEX

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: JN47 · 416 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 975 km (approx.)
Last such locator decoded: 2026-09-19 05:23 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	HB9CEX S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 05:23	40m	+4 / -8	ZL3IO	-4 / -	3	✓ Closing observed
09-19 05:20	40m	+4 / -	EA8BS	- / -9	3	✓ Closing fragment
09-18 07:10	40m	-2 / -	OE1PMD	-2 / +6	7	✓ Full exchange observed
09-18 05:19	80m	0 / -	DO2NM	-2 / -	5	✓ Full exchange observed
09-18 05:17	80m	+5 / -	K2FST	- / -9	4	Partial capture
09-18 05:16	80m	-2 / -	F4HUN	- / -6	3	✓ Closing fragment
09-18 05:14	80m	0 / -	DO1ID	+14 / +8	4	✓ Full exchange observed
09-18 05:13	80m	+5 / -	G0TSM/P	- / +2	2	Partial capture
09-18 05:09	80m	+6 / -3	LA3LUA	-1 / -7	6	✓ Full exchange observed
09-18 05:07	80m	+2 / +10	DO9UWE	-11 / -	6	✓ Full exchange observed
09-18 05:03	80m	+6 / -	G0TSM/P	- / -25	8	Partial capture
09-18 05:00	80m	+5 / -15	G8OO	-5 / +8	5	✓ Full exchange observed
09-18 04:59	80m	+1 / +1	9A60CBM	+1 / -	2	Partial capture
09-17 06:27	40m	+1 / -1	II6IALU	-11 / -	6	Partial capture
09-17 06:24	40m	+1 / -	II9IAGM	- / +2	5	Partial capture
09-17 06:20	40m	+3 / -	II0IHMG	- / -22	2	Partial capture
09-17 06:18	40m	+4 / -	ZL1BRL	- / -	3	Partial capture
09-17 06:17	40m	-4 / -	DL/PG1N	- / +3	2	Partial capture
09-14 05:42	40m	-4 / -	SQ6FHT	- / -15	2	Partial capture
09-13 20:20	80m	-6 / -	HB3YPJ	-24 / +1	6	✓ Closing observed
09-11 18:19	80m	-2 / -	OE9HGV	-9 / -	2	✓ Closing observed
09-11 12:02	40m	-6 / -	PD0JT	- / -1	2	✓ Closing fragment
09-11 11:56	40m	-9 / -4	OZ6MM	-14 / -10	7	✓ Full exchange observed
09-10 05:42	40m	- / -	IZ2ACM	-2 / -	2	Partial capture
09-10 05:42	40m	+1 / -	IH9/IT9JUI	- / -16	3	Partial capture
09-10 05:41	40m	+1 / -6	RC2Y	-4 / -4	4	✓ Full exchange observed
09-10 05:41	40m	+2 / -	UR9QQ	-9 / -	6	Partial capture
09-10 05:38	40m	+3 / -	ZL3TUX	- / -5	3	✓ Closing fragment
09-10 05:36	40m	+3 / -	SN100PKP	- / 0	2	Partial capture
09-10 05:30	40m	+6 / -	ZL3TE	- / -10	7	✓ Closing fragment
09-09 07:42	40m	-6 / -	SM7/DL5BTE	- / -5	2	Partial capture
09-08 05:26	40m	-14 / -	5N0YEN	- / -11	2	Partial capture
09-07 07:07	40m	-12 / -	J38DX	- / -10	5	Partial capture
09-07 06:52	40m	-9 / +5	OE3ZIO	-6 / -2	5	✓ Full exchange observed
09-07 06:49	40m	-7 / -	SP1373AB	- / -12	2	Partial capture
09-06 07:20	40m	-5 / -	VK3BAC	- / -	2	✓ Closing fragment
09-06 07:12	40m	-5 / +3	Z62NS	-17 / -13	5	✓ Full exchange observed
09-06 07:06	40m	-5 / -	SQ100PKP	- / +9	5	Partial capture
09-06 06:56	40m	-2 / -4	T77NC	-8 / +8	4	✓ Full exchange observed
09-04 07:25	40m	- / -	PD1AC	-18 / -	2	✓ Closing fragment
09-04 07:22	40m	-12 / -9	OV6ZM	-16 / -8	6	✓ Full exchange observed
09-03 08:09	40m	-8 / -	AM42SDC	- / -	7	Partial capture
09-03 08:06	40m	-12 / -	DB26YLBB	- / -15	2	Partial capture
09-03 08:03	40m	-10 / -	DH8KAM	- / -13	3	Partial capture
09-03 08:00	40m	-14 / -	DB26YLBB	-14 / +3	3	Partial capture
09-03 07:07	40m	-11 / -	PB5DX	- / -	4	Partial capture
09-03 07:03	40m	-7 / +4	DF0NN	-7 / -	3	Partial capture
09-03 06:51	40m	-7 / 0	DL9KM	-5 / 0	5	✓ Full exchange observed
09-03 06:49	40m	-8 / -	DL4MFC	-9 / +6	5	✓ Full exchange observed
09-03 06:44	40m	-4 / 0	HB9GII	-15 / -	5	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
063100 -11 1072  HB9CEX II6IALU R-01
071000  -5  545  OE1PMD HB9CEX +06 (x5)
071215  -2 1734  HB9CEX OE1PMD R+17
071230  -2  656  OE1PMD HB9CEX RR73
052045  +4  445  EA8BS HB9CEX -09 (x3)
052315  +4  445  ZL3IO HB9CEX JN47
052430  -5  332  HB9CEX ZL3IO R-08 (x2)
083630  -9  744  RA4DAL/P HB9CEX R-04

80m

UTC    dB Audio  Message
051445  +0  509  DO1ID HB9CEX R+08
051500 +14  382  HB9CEX DO1ID RR73
051515  +1  509  DO1ID HB9CEX 73
051615  -5  509  F4HUN HB9CEX JN47 (x3)
051745  +7  509  K2FST HB9CEX -09 (x4)
051945  -3  509  DO2NM HB9CEX JN47
052000  -5  817  HB9CEX DO2NM +19
052015  +0  509  DO2NM HB9CEX R+12
052030  +2  817  HB9CEX DO2NM RR73
052045  +2  509  DO2NM HB9CEX 73

20m

UTC    dB Audio  Message
121230  -3  680  DB0IPA HB9CEX JN47 (x4)
121515  +0  680  9A170NT HB9CEX JN47
122100  +5  679  LA2XNA HB9CEX JN47 (x2)
130945  +3  679  PD5RAY HB9CEX -06 (x2)
131300  -3  679  PA1GUZ HB9CEX -03
131315  +3 2225  HB9CEX PA1GUZ R-04
131330  -9  679  PA1GUZ HB9CEX RR73
132215  +1  679  LZ3HI HB9CEX JN47
132300 -15 1371  HB9CEX LZ3HI RR73
132315  -3  681  LZ3HI HB9CEX 73

160m

UTC    dB Audio  Message
001015  +9 1053  RI1FJL HB9CEX JN47 (x7)

10m

UTC    dB Audio  Message
092745 -16  947  HB9CEX EA3CU JN11
092815 -11 1808  HB9CEX F4FSY -13 (x2)
093600 -16  896  EA3CU HB9CEX +03
093630 -13  896  MW0KJN HB9CEX JN47 (x4)
094415 -16  896  EA1CQ HB9CEX JN47 (x2)
100445 -24 2073  HB9CEX M7TUP 73
111215 -18  992  CU6NS HB9CEX 73
111330 -19  992  HB9CNU HB9CEX R+02 (x2)
185615 -14  717  CQ HB9CEX JN47                        a1

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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