DL1ZU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO40

Receiver-side FT8 activity involving DL1ZU, decoded by SO8OO in southeastern Poland. 243 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 33 UTC dates in the available aggregate history. Observed between 2026-06-12 and 2026-08-31.

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 243 FT8 messages attributed to DL1ZU as the transmitting token by decoded message structure across 33 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (60%), followed by 80 m (22%) and 40 m (16%). Several six-hour UTC windows tied for the largest share (61%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

243

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

80m · 54 40m · 40 20m · 147 10m · 2

First attributed message: 2026-06-12
Last attributed message: 2026-08-31 05:43 UTC

Observed FT8 message patterns

Attributed sample: 243 messages
Active dates: 33 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -18 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 41, moderate (-15 to -9 dB) 76, strong (≥ -8 dB) 126.

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 DL1ZU in decoded directed-looking exchanges:

3G1DX · Chile EB3JT · Spain F5IXN · France HC2GRC · Ecuador JY5CG · Jordan K2B · United States K4CAE · United States KA9EKJ · United States KF0YOB · United States LY3BES · Lithuania OS9T · Belgium PA2CV · Netherlands

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 DL1ZU

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: JO40 · 168 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 911 km (approx.)
Last such locator decoded: 2026-08-30 06:38 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	DL1ZU S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-31 05:43	80m	-20 / -	F5RMK	- / -3	2	✓ Closing fragment
08-30 06:38	80m	-12 / -	GB0SL	- / -17	3	✓ Closing fragment
08-29 20:21	80m	0 / -	RI1FJL	- / -18	13	✓ Closing fragment
08-28 21:06	80m	-4 / -	R1IO	- / -	4	Partial capture
08-28 20:55	80m	+4 / -	R1IO	- / -	4	Partial capture
08-28 20:44	80m	-2 / -	RI1FJL	- / -	6	Partial capture
08-28 01:43	80m	-7 / -	RI1FJL	- / -	7	Partial capture
08-28 01:37	80m	-6 / -	RI1FJL	- / -	3	Partial capture
08-27 19:22	80m	-18 / -	RI1FJL	- / -	2	Partial capture
08-27 19:17	80m	-6 / -	RI1FJL	- / -	2	Partial capture
08-24 09:35	20m	+1 / -6	OZ9FF	-7 / -	2	Partial capture
08-22 06:15	20m	+3 / -	3V8HP	- / -	2	Partial capture
08-22 06:10	20m	+8 / -	3V8HP	- / -	2	Partial capture
08-02 07:03	20m	-14 / -	XE1TZP	- / -	2	Partial capture
08-02 06:24	20m	-4 / -	W9MO	- / -	2	Partial capture
08-02 06:13	20m	-14 / -	K6C	- / -	3	Partial capture
07-30 07:57	20m	-21 / -	<...>	- / -	3	Partial capture
07-28 06:15	20m	-13 / -7	EB3JT	-2 / 0	11	✓ Full exchange observed
07-28 06:14	20m	-17 / -	KA9EKJ	- / +1	2	✓ Closing fragment
07-28 06:06	20m	-4 / -	WA7PVE	- / -12	4	✓ Closing fragment
07-19 07:23	20m	-22 / -	TM00TFR	- / -	2	Partial capture
07-18 19:46	40m	-2 / 0	DL3MIB	-6 / -	8	✓ Full exchange observed
07-18 19:42	40m	-8 / -	UN8DSW	- / -15	2	✓ Closing fragment
07-18 19:10	40m	-3 / -	<...>	-4 / +10	3	✓ Closing fragment
07-17 12:55	20m	-11 / -	KF0YOB	- / -7	3	✓ Closing fragment
07-17 12:07	20m	- / -8	UT7UJ	+4 / -	2	✓ Closing fragment
07-17 07:01	40m	-22 / -	S51LT	- / -	4	Partial capture
07-17 06:51	40m	-8 / -	LB0XJ	- / -4	2	✓ Closing fragment
07-17 06:27	40m	-9 / -1	9A4ZM	-6 / -	6	✓ Full exchange observed
07-17 06:25	40m	-9 / -8	DL6UCK	-9 / -	4	✓ Full exchange observed
07-16 20:44	40m	-1 / -	TJ1GD/P	- / -	2	Partial capture
07-16 20:08	40m	-8 / -	TM25TFR	- / -	3	Partial capture
07-16 20:04	40m	-10 / -	TM00TFR	- / +1	2	Partial capture
07-16 20:01	40m	- / -13	SP1JQJ	-4 / -	2	✓ Closing fragment
07-16 16:59	20m	- / -18	JY5CG	-18 / -	2	✓ Closing fragment
07-16 16:47	40m	-20 / -	RL2F	- / -	2	✓ Closing fragment
07-16 12:26	40m	- / +3	DL5DQZ	-11 / -	2	✓ Closing fragment
07-16 07:41	40m	- / -	UT4PA	-12 / -	3	Partial capture
07-13 20:21	20m	-20 / -14	TN8GD	-6 / -	3	✓ Closing observed
07-13 19:06	20m	- / -2	YO4LUP	-16 / -	4	✓ Closing fragment
07-13 19:04	20m	- / -15	YO6LM	0 / -	2	✓ Closing fragment
07-10 05:52	20m	-2 / -	ZL3IO	- / -	10	✓ Closing fragment
07-10 05:28	20m	-14 / -	ZL3IO	- / -	2	Partial capture
07-10 05:17	20m	-7 / -	3G1DX	- / -11	5	✓ Closing fragment
07-10 05:04	20m	-10 / -	VK5GY	- / -11	3	✓ Closing fragment
07-08 05:57	20m	+3 / +6	HC2GRC	-3 / -	7	✓ Closing observed
07-07 06:11	20m	-10 / -	W6IWW	- / -	5	Partial capture
07-07 06:09	20m	- / -2	PA2CV	-6 / -	2	✓ Closing fragment
07-06 07:03	20m	-12 / -	F5IXN	-24 / +6	4	✓ Closing observed
07-06 07:01	20m	+1 / -	K2B	- / -1	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
202315  +0  412  RI1FJL DL1ZU JO40 (x10)
063815 -12 1165  GB0SL DL1ZU JO40 (x3)
054315 -20 1202  F5RMK DL1ZU R-03 (x2)

20m

UTC    dB Audio  Message
061430 -13 1277  K6C DL1ZU JO40
062400  -6 3020  W9MO DL1ZU JO40 (x2)
062600 -16 1579  K4CAE DL1ZU JO40 (x2)
070330 -16 1807  XE1TZP DL1ZU JO40 (x2)
085645  -6 1556  YV5JLO DL1ZU JO40
060745 +12  994  XQ1KK DL1ZU JO40
061000  +7  784  3V8HP DL1ZU JO40 (x4)
093530  +1 2328  OZ9FF DL1ZU JO40
093545  -7 2328  DL1ZU OZ9FF -06

40m

UTC    dB Audio  Message
191200  -4  337  DL1ZU <...> 73
191315  +0 2809  BG0HP DL1ZU 73
191415  +0  438  VR2VAZ DL1ZU JO40
194245  -8 2177  UN8DSW DL1ZU R-15 (x2)
194430  -6 2027  TA7MMI DL1ZU JO40
194530  +0  707  <...> DL1ZU R+14
194615  -1 1068  DL1ZU DL3MIB JN57 (x2)
194700  -2 1067  DL3MIB DL1ZU +13
194715  -8 1068  DL1ZU DL3MIB R+00
194730  -2 1067  DL3MIB DL1ZU RR73
194745  -7 1068  DL1ZU DL3MIB 73 (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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