AM42SDC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Spain

Receiver-side FT8 activity involving AM42SDC, decoded by SO8OO in southeastern Poland. 1,946 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, across 14 UTC dates in the available aggregate history. Observed between 2026-09-01 and 2026-09-14.

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 1,946 FT8 messages attributed to AM42SDC as the transmitting token by decoded message structure across 14 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (79%), followed by 60 m (14%) and 80 m (6%). Most decodes (64%) fell within the six-hour window 22:00-04:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

1,946

Messages attributed

UTC dates decoded

158

Active 15-min windows

-13 dB

Estimated median S/N

Bands

80m · 123 60m · 277 40m · 1,546

First attributed message: 2026-09-01
Last attributed message: 2026-09-14 15:12 UTC

Observed FT8 message patterns

Attributed sample: 1,946 messages
Active dates: 14 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -21 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 805, moderate (-15 to -9 dB) 502, strong (≥ -8 dB) 639.

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 AM42SDC in decoded directed-looking exchanges:

SX48JM · Greece ×4 ER35MD · Moldova ×2 OE6OCG · Austria ×2 DM3BM · Fed. Rep. of Germany EA1ARJ · Spain F4MZI · France GM5DNA · Scotland KC8JMH · United States KD8RTT · United States LU3CQ · Argentina ON1BH · Belgium R2BQM · European Russia

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.

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	AM42SDC S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-14 14:32	40m	- / -5	DL2HUC	-3 / -	3	Partial capture
09-13 18:34	40m	- / -5	EW4DX	+6 / -	2	Partial capture
09-13 18:04	40m	- / -	UT7NS	+8 / -	4	Partial capture
09-13 18:00	40m	0 / -13	RA3ZH	+6 / -19	6	Partial capture
09-13 17:54	40m	+1 / -	<...>	+2 / -	2	✓ Closing fragment
09-13 17:50	40m	0 / -	<...>	-2 / -	2	✓ Closing fragment
09-13 17:50	40m	- / -	DK0NZ	+5 / -	9	Partial capture
09-13 17:35	40m	+2 / 0	SP6PCB	-2 / -6	3	Partial capture
09-13 17:32	40m	-6 / -	<...>	+4 / -	5	✓ Closing fragment
09-13 17:32	40m	-2 / -	SP3IPA	- / -17	2	Partial capture
09-13 17:26	40m	-4 / +3	EA1JS	-11 / -22	2	Partial capture
09-13 17:25	40m	- / -	RD7O	-6 / -	2	Partial capture
09-13 17:25	40m	-4 / -	<...>	0 / -	3	✓ Closing fragment
09-13 17:14	40m	-5 / -	DL8YBL	- / -16	2	Partial capture
09-13 17:13	40m	-5 / -	<...>	+7 / -	2	✓ Closing fragment
09-13 17:12	40m	-4 / -18	EW4TT	+11 / -24	4	Partial capture
09-13 17:11	40m	-1 / -	<...>	+16 / -	2	✓ Closing fragment
09-13 17:08	40m	+2 / -11	SP9DHY	+10 / -24	9	Partial capture
09-13 17:06	40m	- / -	EW4TT	+12 / -	2	Partial capture
09-13 17:02	40m	-4 / -	IK0SME	- / -24	3	Partial capture
09-13 16:57	40m	-6 / -	OE6OCG	+11 / -18	5	✓ Closing observed
09-13 16:50	40m	- / -	19MA76	-1 / -	3	Partial capture
09-13 16:47	40m	-6 / -	<...>	+2 / -	4	✓ Closing fragment
09-13 16:47	40m	-9 / -	SQ8SP	- / -10	2	Partial capture
09-13 16:47	40m	- / -	DK0NZ	+2 / -	2	Partial capture
09-13 16:42	40m	-7 / -	<...>	-8 / -	2	✓ Closing fragment
09-13 16:37	40m	- / -5	SP6PCB	+3 / -	2	Partial capture
09-13 16:37	40m	-8 / -	<...>	+2 / -	3	✓ Closing fragment
09-13 16:36	40m	-6 / -	US6CQ	- / -24	3	Partial capture
09-13 16:22	40m	-8 / -	<...>	- / -	3	✓ Closing fragment
09-13 16:09	40m	-9 / -	<...>	- / -	3	✓ Closing fragment
09-13 16:04	40m	-11 / -	<...>	-7 / -	2	✓ Closing fragment
09-13 15:47	40m	- / -	DG2SAT	+4 / -	2	Partial capture
09-13 15:41	40m	-11 / -	<...>	+7 / -	2	✓ Closing fragment
09-13 07:35	40m	-6 / -15	ON4KEB	-5 / -2	2	Partial capture
09-12 20:13	60m	- / -15	G8OO	-4 / -	2	Partial capture
09-12 20:10	60m	- / -3	IW2CAK	-8 / -	2	Partial capture
09-12 19:27	80m	- / +1	YO2OXD	+13 / -	11	Partial capture
09-12 18:49	60m	- / -10	DL1BFF	-4 / -	4	Partial capture
09-12 18:36	40m	- / -17	E78Y	+9 / -	4	Partial capture
09-12 18:32	40m	+1 / -	<...>	-8 / -	3	✓ Closing fragment
09-12 18:31	40m	- / -14	RN6MA	0 / -	3	Partial capture
09-12 18:30	40m	- / 0	SP6PCB	-2 / -	4	Partial capture
09-12 18:28	40m	+2 / -	<...>	+2 / -	4	✓ Closing fragment
09-12 18:14	40m	- / -	<...>	+4 / -	2	✓ Closing fragment
09-12 18:08	40m	- / -	DK3KM	+6 / -	2	Partial capture
09-12 18:04	40m	-7 / -	SP6PCB	- / -17	3	Partial capture
09-12 18:01	40m	-6 / -7	R7GR	+4 / -24	12	Partial capture
09-12 18:00	40m	-4 / -	SP6PCB	- / -13	3	Partial capture
09-12 17:58	40m	-4 / -	DL3BH	- / -10	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
180130  -2  460  RA3ZH AM42SDC -19
180230  -3  460  CQ AM42SDC (x3)
180415  +9  458  AM42SDC UT7NS KN49 (x4)
183445  +5  550  AM42SDC EW4DX KO23 (x2)
032100 -21 1955  AM42SDC R7KDW -10
143230  -3 1956  AM42SDC DL2HUC JO51 (x3)
151245 -11  463  DJ1OJ AM42SDC +01

60m

UTC    dB Audio  Message
045115  -8 1845  AM42SDC SV1LK R+00
172500 -12 2624  AM42SDC DL4YDR JO32 (x2)
174415  +1 2625  AM42SDC IZ4TOA -08
184945  -4  436  AM42SDC DL1BFF JO62 (x4)
192715  -3 2278  AM42SDC DL7GP R-06
194945 -11 1863  AM42SDC DL3BH R-13
201015  -7  432  AM42SDC IW2CAK JN45 (x2)
201345  -5  541  AM42SDC G8OO JO02 (x2)
205830 -10 2146  AM42SDC YO6FNF -08

80m

UTC    dB Audio  Message
214615  -2  835  AM42SDC <...> 73
214745 -21 1103  AM42SDC TF3VS HP94 (x3)
192730 +16 2694  AM42SDC YO2OXD KN05 (x11)

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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