YT1DDL — 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: Serbia Most frequent locator attributed to this token: KN04

Receiver-side FT8 activity involving YT1DDL, decoded by SO8OO in southeastern Poland. 4,533 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 99 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-11-02.

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 4,533 FT8 messages attributed to YT1DDL as the transmitting token by decoded message structure across 99 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (41%), followed by 80 m (34%) and 20 m (24%). The busiest six-hour window was 19:00-01:00 UTC, containing 50% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

4,533

Messages attributed

UTC dates decoded

1,109

Active 15-min windows

-7 dB

Estimated median S/N

Bands

80m · 1,521 40m · 1,869 20m · 1,067 10m · 76

First attributed message: 2026-06-06
Last attributed message: 2026-11-02 00:38 UTC

Observed FT8 message patterns

Attributed sample: 4,533 messages
Active dates: 99 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -17 to +4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 646, moderate (-15 to -9 dB) 1,254, strong (≥ -8 dB) 2,633.

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 YT1DDL in decoded directed-looking exchanges:

DL7PIA · Fed. Rep. of Germany ×7 IN3IBW · Italy ×6 SQ5ANT · Poland ×6 SQ8AZT · Poland ×6 AO5CV · Spain ×5 IQ2AAH · Italy ×5 AM5CV · Spain ×4 EH3ST · Spain ×4 EU1EU · Belarus ×4 DH2LM · Fed. Rep. of Germany ×4 IQ4JO · Italy ×3 YU5DR · Serbia ×3

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 YT1DDL

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: KN04 · 2,594 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 608 km (approx.)
Last such locator decoded: 2026-11-02 00:38 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	YT1DDL S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-02 00:37	80m	+9 / -	RA9ACA	- / -	3	Partial capture
11-02 00:29	80m	-6 / -	R8PG	- / -	3	Partial capture
11-02 00:20	80m	-7 / -	4L1FL	- / -	3	Partial capture
11-02 00:16	80m	-9 / -	4L1FL	- / -	2	Partial capture
11-02 00:12	80m	-5 / -	R8PG	- / -	3	Partial capture
11-02 00:07	80m	-14 / -	4X1TI	- / -	3	Partial capture
11-01 23:36	80m	+2 / -	VO1HP	- / -	2	Partial capture
11-01 23:20	80m	-4 / -	UN7CBY	- / -	2	Partial capture
11-01 23:15	80m	-2 / -15	4Z5NN	-10 / -9	4	✓ Full exchange observed
11-01 23:13	80m	+4 / -	RA6FCU/P	- / -5	2	Partial capture
11-01 23:08	80m	0 / -	EX7DY	- / -	3	Partial capture
11-01 22:51	80m	+2 / -	EX7DY	- / -	3	Partial capture
11-01 22:38	80m	-1 / -	A92AE	- / -	2	Partial capture
11-01 00:26	80m	-3 / -	KO2E	- / -	3	Partial capture
11-01 00:03	80m	-4 / -	UA9YK	- / -	2	Partial capture
10-31 23:39	80m	- / -	DL3MIB	+13 / -	6	Partial capture
10-31 23:38	80m	+6 / -	TC3ATA	- / -5	3	✓ Closing fragment
10-31 23:33	80m	+2 / -4	4O7CC	+10 / +1	4	✓ Full exchange observed
10-31 23:29	80m	-7 / -	CT3IQ	- / -	2	Partial capture
10-31 21:16	80m	-4 / -	TA7I	- / -	2	Partial capture
10-31 20:44	80m	-8 / -	TC3TR	0 / -	5	✓ Closing observed
10-31 20:40	80m	+3 / -	TC6TR	- / -	2	Partial capture
10-30 22:13	40m	- / -22	TA2LE	-20 / -	2	Partial capture
10-30 20:20	80m	-15 / -	A92AE	- / -	2	Partial capture
10-30 19:36	80m	- / -	YO4BXX	+8 / -	5	Partial capture
10-30 19:34	80m	-7 / -	EX7DY	- / -	2	Partial capture
10-30 19:05	80m	-3 / -	UN0GY	- / -	5	Partial capture
10-30 18:59	80m	+1 / -	OD5ZZ	- / -13	5	✓ Closing fragment
10-30 18:53	80m	-1 / -	EX7DY	- / -	7	Partial capture
10-30 18:41	80m	-1 / -	OD5ZZ	- / -	3	Partial capture
10-30 18:20	80m	-7 / -	OD5ZZ	- / -18	3	Partial capture
10-30 18:08	80m	-10 / -	EX7DY	- / -	2	Partial capture
10-30 17:51	80m	-12 / -	RM9WN	- / -	3	Partial capture
10-30 17:30	80m	-8 / -	IS0BQE	- / -11	3	✓ Closing fragment
10-17 23:42	80m	-5 / +4	E75C	+2 / +3	5	✓ Full exchange observed
10-17 19:06	40m	- / -11	IQ3TR	+2 / -	2	✓ Closing fragment
10-16 22:25	40m	-19 / -	EY7BM	- / -	5	Partial capture
10-16 17:40	40m	-10 / -	UN7GGB	- / -	4	Partial capture
10-16 17:38	40m	-9 / -	A65DF	- / -	2	Partial capture
10-16 17:33	40m	-8 / -	OL900JAR	- / -17	2	Partial capture
10-16 17:28	40m	-10 / -	TA2KAT	- / -	2	Partial capture
10-16 17:15	40m	-9 / -	OL900JAR	- / -	3	Partial capture
10-16 17:10	40m	-10 / -	UA9LKL	- / -	3	Partial capture
10-16 17:06	40m	-12 / -	RM8CZ	- / -	3	Partial capture
10-16 16:55	40m	-12 / -	UA9AJK	- / -	2	Partial capture
10-16 16:47	40m	- / -24	UA9LKL	-22 / -	2	Partial capture
10-16 16:37	40m	- / -14	UA3QNA	+4 / -	4	✓ Closing fragment
10-14 21:47	40m	- / -10	RW9JZ	-1 / -	2	✓ Closing fragment
10-12 23:12	80m	+4 / -	RK9UN	- / -	2	Partial capture
10-12 21:43	80m	+1 / -	5B4AMX	- / -9	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
001215  -4  667  R8PG YT1DDL KN04 (x3)
001630  -8  667  4L1FL YT1DDL KN04 (x5)
002915  -2  667  R8PG YT1DDL KN04 (x3)
003730 +11  667  RA9ACA YT1DDL KN04 (x2)
003815  -7  572  YT1DDL IW0HIQ JN62
003830  +6  667  RA9ACA YT1DDL KN04

40m

UTC    dB Audio  Message
215015 -20 1459  K4SOI YT1DDL KN04
215330 -13 1460  VO1ACZ YT1DDL KN04
222545 -13 1459  EY7BM YT1DDL KN04 (x5)
224345 -19 1460  W9DDK YT1DDL KN04
190630  +4 1329  YT1DDL IQ3TR -11 (x2)
212445 -11  983  YT1DDL 5B4AMX -17
221330 -20 2002  YT1DDL TA2LE -22 (x2)
221800 -12  493  YT1DDL <...> -19
165900 -16  986  YT1DDL 3A2LF +05

10m

UTC    dB Audio  Message
120545 -15 1823  YT1DDL ES2AJ RR73
170545 -15 1867  YT1DDL I5PU +02
173700 -17 1094  RM3TO YT1DDL KN04
173815 -17 1094  DJ7TO YT1DDL KN04
174230 -19 1094  RM3TO YT1DDL KN04
093830 -11 2670  YT1DDL LZ2VQ KN23
132330 -15 2242  4X1UF YT1DDL KN04 (x3)
142445 -19 1501  YT1DDL PY2FUI -07 (x2)
142100 -22 1309  YT1DDL UX3HX +04
134000 -11 1233  YT1DDL CR7BUJ -12 (x2)

20m

UTC    dB Audio  Message
212445  -2 2573  AB8M YT1DDL KN04
212945 -11 1272  W8WV YT1DDL KN04
223330 -12  875  KD2YCK YT1DDL KN04 (x3)
011345 -12 1391  YT1DDL W1TXT -13 (x2)
043545 -16 1779  TA3F YT1DDL R-18 (x5)
085215 -16 1320  9A60CBM YT1DDL KN04
085245  +5  756  IR7MGGC YT1DDL KN04 (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

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