DD7XX — 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: Fed. Rep. of Germany Most frequent locator attributed to this token: JO43

Receiver-side FT8 activity involving DD7XX, decoded by SO8OO in southeastern Poland. 111 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-07-25 and 2026-10-07.

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 111 FT8 messages attributed to DD7XX as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (60%), followed by 20 m (37%) and 80 m (3%). Most decodes (59%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

111

Messages attributed

UTC dates decoded

Active 15-min windows

-7 dB

Estimated median S/N

Bands

80m · 3 40m · 67 20m · 41

First attributed message: 2026-07-25
Last attributed message: 2026-10-07 19:40 UTC

Observed FT8 message patterns

Attributed sample: 111 messages
Active dates: 8 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -18 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 19, moderate (-15 to -9 dB) 29, strong (≥ -8 dB) 63.

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 DD7XX in decoded directed-looking exchanges:

9A4ZM · Croatia ×2 F5OYA/P · France ×2 US2YW · Ukraine ×2 CU2JX · Azores HA1BF · Hungary IU5HIU · Italy K4YT · United States KP4AH · Puerto Rico LZ5UY · Bulgaria OK1MDK · Czech Republic PP5HR · Brazil RI1FJL · Franz Josef Land

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 DD7XX

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: JO43 · 53 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 964 km (approx.)
Last such locator decoded: 2026-10-07 19:40 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	DD7XX S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-20 01:18	40m	- / -17	CT7BRV	-9 / -	3	✓ Closing fragment
10-07 19:41	80m	- / -	DL7ACA	+2 / -	2	Partial capture
10-07 19:40	80m	-20 / -14	PC2J	-3 / +6	3	Partial capture
10-07 19:38	80m	-19 / -17	DG4KAI	+6 / +10	3	✓ Full exchange observed
10-07 19:05	40m	- / -	IZ3LSZ	-10 / -	3	Partial capture
10-07 19:01	40m	- / -4	DL3MIB	+7 / -	3	✓ Closing fragment
10-07 19:00	40m	-14 / -	HA5LB	- / +2	2	✓ Closing fragment
10-07 18:56	40m	- / +3	OH5KNL	+11 / -	2	✓ Closing fragment
10-07 18:53	40m	+4 / 0	HB9ELE	+12 / -	3	✓ Closing observed
10-07 10:32	40m	- / -10	DL7UKM	-6 / -	3	✓ Closing fragment
10-07 10:23	40m	- / 0	DM5MA	-13 / -	3	✓ Closing fragment
10-07 10:16	40m	- / -	PD0IFI	-3 / -	2	Partial capture
10-07 10:15	40m	- / -	DL7DL	-7 / -	9	✓ Closing fragment
10-07 10:15	40m	- / -17	EU1EU	-15 / -	2	✓ Closing fragment
10-07 10:11	40m	- / -	DL7DL	-16 / -	2	Partial capture
10-01 03:50	40m	- / -8	F5OYA/P	-3 / -	5	✓ Closing fragment
10-01 03:49	40m	- / -14	RX6LHY	-14 / -	3	Partial capture
09-19 23:23	40m	- / -	IK0CHU	+5 / -	2	Partial capture
09-19 23:19	40m	-2 / -18	N1IWP	-13 / -	5	✓ Closing observed
09-19 23:16	40m	-1 / -1	9A1CCB	-6 / -	5	✓ Full exchange observed
09-19 23:12	40m	-3 / -	F4NFM	-11 / +10	4	✓ Closing observed
09-19 23:10	40m	-4 / -	CU6AB	- / -	2	Partial capture
09-19 23:09	40m	+2 / -	N1IWP	- / -	2	Partial capture
09-19 23:05	40m	-12 / -5	R6DUW	-13 / +4	5	✓ Full exchange observed
09-19 23:04	40m	-8 / -18	F5PBG	-3 / -	3	✓ Full exchange observed
09-19 23:03	40m	-6 / -19	EX7CQ	-3 / -	4	✓ Full exchange observed
09-14 21:20	40m	- / -19	EA8UP	-1 / -	5	✓ Closing fragment
09-13 21:41	40m	- / -10	R5AV	-16 / -	2	✓ Closing fragment
09-13 21:38	40m	- / -9	YO4NF	-19 / -	2	✓ Closing fragment
09-13 05:24	40m	-2 / -	EB3JT	- / +8	4	✓ Closing fragment
09-13 05:23	40m	-4 / -	US2YW	- / -	2	✓ Closing fragment
09-13 05:21	40m	-7 / -9	YO6LM	+18 / +8	5	✓ Full exchange observed
09-13 05:21	40m	- / -	UA4FKT	-10 / -	4	Partial capture
09-13 05:20	40m	-10 / -	EC3A	- / -1	2	✓ Closing fragment
09-13 05:12	40m	-4 / -8	LZ936BA	+5 / -	3	Partial capture
09-13 05:09	40m	-5 / -	HG8LXL	- / -	2	✓ Closing fragment
09-13 05:08	40m	-1 / -17	OA4ENG	-21 / -1	4	✓ Full exchange observed
08-31 13:24	20m	- / +3	IU5HIU	+3 / -	3	✓ Closing fragment
08-31 13:22	20m	-6 / -	YO5PHL	- / -	2	✓ Closing fragment
08-31 10:43	20m	- / -6	OK1MDK	+9 / -	2	✓ Closing fragment
08-31 10:21	20m	- / -	F4HSB	-16 / -	2	Partial capture
08-31 10:20	20m	- / -1	9A4ZM	+17 / -	3	✓ Closing fragment
08-31 10:14	20m	-4 / -	SP7FID	- / +8	3	✓ Closing fragment
08-31 10:12	20m	-16 / -15	HA1BF	-2 / 0	5	✓ Full exchange observed
08-31 09:49	20m	- / 0	LZ5UY	-17 / -	2	✓ Closing fragment
08-30 21:53	20m	-11 / -	KC2NJ	- / -18	3	Partial capture
08-30 21:47	20m	+1 / -	LU1DA	- / -	4	Partial capture
08-30 21:46	20m	-6 / -	LU1GBS	- / -	2	Partial capture
08-30 21:44	20m	-7 / -	US2YW	- / +4	3	✓ Closing fragment
08-30 21:43	20m	-11 / -	TA4DX	- / +10	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
185930 -13 1427  DD7XX IQ9SZ/2 -18
190045 -15  785  HA5LB DD7XX +02 (x2)
190130  +4 1069  DD7XX DL3MIB JN57 (x3)
190500  -8  233  DD7XX IZ3LSZ JN65 (x3)
191045 -17 2297  CQ DD7XX JO43
191230 -20 2170  DD7XX R3MW KO97
191300 -22 1664  DD7XX M0IEP IO91
011815  -8  828  DD7XX CT7BRV -17 (x3)

80m

UTC    dB Audio  Message
193815 -19 2062  DG4KAI DD7XX +10
193830  +9 2061  DD7XX DG4KAI R-17 (x2)
194015 -13 2062  CQ DD7XX JO43
194030  -4 2062  DD7XX PC2J JO22
194045 -20 2062  PC2J DD7XX +06
194100  -2 2062  DD7XX PC2J R-14
194130  +1 2062  DD7XX DL7ACA JO40 (x2)

20m

UTC    dB Audio  Message
102100 +15  483  DD7XX 9A4ZM 73
102130 -15 1745  DD7XX F4HSB JN37
103100 -15 1194  OM7AMA DD7XX R-02
103300 -12  378  OY1HJ DD7XX JO43
104345  +9 1958  DD7XX OK1MDK -06 (x2)
104830 -23 1471  OZ7DR DD7XX JO43
105500  +0 1408  DD7XX OE3MZC -09
110330 -15 1836  TF4WD DD7XX 73
132145  -9 2303  CQ DD7XX JO43
132215  -4 2303  YO5PHL DD7XX +19 (x2)
132400  +3  726  DD7XX IU5HIU JN53 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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