AD4C — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EL97

Receiver-side FT8 activity involving AD4C, decoded by SO8OO in southeastern Poland. 34 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-06 and 2026-09-18.

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 34 FT8 messages attributed to AD4C as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (71%), followed by 80 m (29%). In this small sample, the estimated median decoder S/N was -12 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 10 40m · 24

First attributed message: 2026-08-06
Last attributed message: 2026-09-18 03:28 UTC

Observed FT8 message patterns

Attributed sample: 34 messages
Active dates: 2 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -17 to 0 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 11.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with AD4C in decoded directed-looking exchanges:

DD7EE · Fed. Rep. of Germany 5B4AMM · Cyprus 9K2WA · Kuwait A71XX · Qatar DJ0MAB · Fed. Rep. of Germany DL5AN · Fed. Rep. of Germany EA1AA · Spain G8GRG · England HZ1TT · Saudi Arabia PC2J · Netherlands R6DZL · European Russia RA4ADF · European Russia

Most frequent locator attributed to AD4C

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: EL97 · 9 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,549 km (approx.)
Last such locator decoded: 2026-09-18 03:21 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	AD4C S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-18 03:27	40m	-13 / -	DL5AN	- / -6	2	✓ Closing fragment
09-18 03:21	40m	-5 / -	TN8GD	- / -19	5	✓ Closing fragment
09-18 03:14	40m	0 / -	US1VM	- / -10	6	Partial capture
09-18 03:13	40m	- / -	RZ5D	-10 / -	3	Partial capture
09-18 03:10	40m	-17 / -18	HZ1TT	-2 / -16	7	✓ Full exchange observed
09-18 03:10	40m	-20 / -12	R6DZL	+6 / -15	3	✓ Full exchange observed
09-18 03:08	40m	-12 / -13	RA4ADF	-13 / -16	19	✓ Full exchange observed
09-18 03:08	40m	-16 / -	SP5EXA	- / -5	2	✓ Closing fragment
09-18 03:05	40m	- / -	UA3PHB	-6 / -	2	Partial capture
09-18 03:05	40m	- / -	UA4FKT	-1 / -	3	Partial capture
09-17 03:42	40m	- / 0	EA1AA	-12 / -	2	✓ Closing fragment
08-06 02:39	80m	-15 / -9	HB9CXZ	+8 / -	3	✓ Closing observed
08-06 02:39	80m	- / -	DK7UY	+11 / -	2	Partial capture
08-06 02:37	80m	- / -	IT9CCB	+9 / -	3	Partial capture
08-06 02:35	80m	- / -16	YO8RAW	-4 / -	2	Partial capture
08-06 02:34	80m	-14 / -	SP5EXA	+22 / -15	9	Partial capture
08-05 03:21	40m	- / -14	UB6OFG	-21 / -	3	✓ Closing fragment
08-04 04:10	40m	- / -8	F5RRS	-13 / -	5	Partial capture
08-04 04:06	40m	- / -	IK3OGN	-9 / -	2	Partial capture
08-04 04:04	40m	- / -	YO9IAB	-12 / -	2	✓ Closing fragment
07-28 01:59	40m	- / -	RA3RDN	-21 / -	2	Partial capture
07-28 01:53	40m	- / -6	DJ0MAB	-8 / -	3	✓ Closing fragment
07-17 00:15	40m	- / -	R6ZEJ	-6 / -	2	Partial capture
07-17 00:13	40m	- / -6	A71XX	-11 / -	3	✓ Closing fragment
07-17 00:08	40m	- / -	PE1NPS	-12 / -	2	Partial capture
07-17 00:08	40m	- / -10	F1PBZ	-2 / -	2	Partial capture
07-17 00:08	40m	- / -	PC2J	-16 / -	2	✓ Closing fragment
07-11 02:35	40m	- / +1	RC6D	-13 / -	3	Partial capture
07-10 00:13	40m	- / -8	5B4AMM	-8 / -	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
031600  -8 2296  AD4C RA4ADF -13
031615  +0 2899  US1VM AD4C R-11 (x3)
031730 -15 2296  AD4C RA4ADF -13 (x2)
031815 -13 2297  RA4ADF AD4C R-16 (x2)
032145  -7  440  TN8GD AD4C EL97 (x5)
032745 -15 1491  DL5AN AD4C R-06 (x2)

20m

UTC    dB Audio  Message
125230 -24 1869  AD4C F4HSB JN37
123245  -1  838  AD4C DD7EE RR73

80m

UTC    dB Audio  Message
023615 +22 2772  AD4C SP5EXA KO02
023630 -16 2771  SP5EXA AD4C -12
023645 +23 2772  AD4C SP5EXA KO02
023700 -16 2771  SP5EXA AD4C -10
023730 -12 2771  CQ AD4C EL97
023745  +5 1641  AD4C YT3PL KN04
023745  +9 2771  AD4C IT9CCB JM77 (x2)
023830 -13 2771  CQ DX AD4C EL97
023845  +8 2771  AD4C IT9CCB JM77
023915 +11 2772  AD4C DK7UY JO44
023945  +9 2189  AD4C HB9CXZ -09
023945 +11 2771  AD4C DK7UY JO44
024015  +6 2190  AD4C HB9CXZ RR73
024030 -15 2771  HB9CXZ AD4C 73

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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