DH3CW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO71

Receiver-side FT8 activity involving DH3CW, decoded by SO8OO in southeastern Poland. 1,584 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-09-13.

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 1,584 FT8 messages attributed to DH3CW as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (76%), followed by 20 m (17%) and 80 m (6%). Most decodes (59%) fell within the six-hour window 13:00-19:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

1,584

Messages attributed

UTC dates decoded

Active 15-min windows

-7 dB

Estimated median S/N

Bands

80m · 99 40m · 1,209 20m · 276

First attributed message: 2026-06-14
Last attributed message: 2026-09-13 18:12 UTC

Observed FT8 message patterns

Attributed sample: 1,584 messages
Active dates: 7 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -16.4 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 206, moderate (-15 to -9 dB) 459, strong (≥ -8 dB) 919.

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 DH3CW in decoded directed-looking exchanges:

SP9LS · Poland ×4 DD1GN · Fed. Rep. of Germany ×2 F4ECT · France ×2 PD0IFI · Netherlands ×2 9A3AUH · Croatia ×2 DK8HC · Fed. Rep. of Germany ×2 DL2BCY · Fed. Rep. of Germany ×2 OZ3AAF · Denmark ×2 UA1ZQN · European Russia ×2 DO9BAU · Fed. Rep. of Germany ×2 1P1VRB/R 9Y2MKM · Trinidad & Tobago

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 DH3CW

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: JO71 · 770 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 508 km (approx.)
Last such locator decoded: 2026-09-13 18:12 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	DH3CW S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 18:05	80m	+1 / -	DK6WS	-8 / -	5	✓ Full exchange observed
09-13 18:05	80m	-2 / -	RC2Y	-3 / +5	4	✓ Closing observed
09-13 18:03	80m	- / -14	HB3YOY	-13 / -	3	Partial capture
09-13 17:57	80m	+1 / -3	DL6EL	+6 / -	3	Partial capture
09-13 17:47	80m	-6 / -7	HF5A	+13 / -	5	✓ Full exchange observed
09-13 17:40	80m	-6 / -	DL7UKM	- / -	2	✓ Closing fragment
09-13 17:36	80m	+4 / -7	US1MM	+6 / -15	4	✓ Full exchange observed
09-13 17:33	80m	- / -	RC2Y	+2 / -	2	Partial capture
09-13 17:30	80m	0 / -4	DL0NS	-14 / -	4	✓ Full exchange observed
09-13 17:28	80m	-6 / -4	DL4EAM	-17 / -1	5	✓ Full exchange observed
09-13 17:25	80m	-8 / -4	SP8IPJ	+2 / -11	5	✓ Full exchange observed
09-13 17:23	80m	-7 / +1	DL6UM	0 / -	5	✓ Full exchange observed
09-13 17:22	80m	0 / +8	DO1FZL	-6 / -	4	✓ Full exchange observed
09-13 17:21	80m	-5 / +10	9A4ZM	+6 / -8	5	✓ Full exchange observed
09-13 17:20	80m	+7 / -	DA6NEL	+3 / -	3	Partial capture
09-13 17:19	80m	-6 / -	DO1BWO	- / -24	2	✓ Closing fragment
09-13 17:15	80m	-1 / +1	DO7AGN	-8 / -	5	✓ Full exchange observed
09-13 17:13	80m	-4 / +6	YL3NT	-7 / +4	5	✓ Full exchange observed
09-13 17:08	80m	+3 / -	9A4ZM	- / -	2	Partial capture
09-13 17:08	80m	+2 / +1	9A3AUH	+12 / -	8	✓ Full exchange observed
09-13 17:06	80m	+2 / -13	R3HH	+2 / -	5	✓ Full exchange observed
09-13 17:04	80m	-3 / -	R2BQM	- / -17	2	✓ Closing fragment
09-13 17:04	80m	- / -	R3HH	-2 / -	2	Partial capture
09-13 17:03	80m	-2 / -	SP9LS	- / -	2	✓ Closing fragment
09-13 17:01	80m	-2 / -	UA3QNA	+6 / +6	3	✓ Closing observed
09-13 16:58	80m	-2 / -24	UA4FKT	+4 / -10	13	✓ Full exchange observed
09-13 16:57	80m	-2 / -	DK7ZT	- / -	2	✓ Closing fragment
09-13 16:56	80m	-7 / -7	DO9BAU	-4 / -	13	✓ Full exchange observed
09-13 16:55	80m	-3 / +3	SP9LS	+10 / -	5	✓ Full exchange observed
09-02 11:32	40m	-4 / -	DL1EFX	- / +10	2	✓ Closing fragment
09-02 11:29	40m	-4 / -	DL6EBC	- / -2	2	✓ Closing fragment
09-02 11:26	40m	-3 / -	IV3VFP	- / +7	2	✓ Closing fragment
09-02 11:21	40m	-4 / +4	DM3PT	-22 / +7	4	✓ Full exchange observed
09-02 11:00	40m	-8 / -	DM1AR	- / -2	2	✓ Closing fragment
09-02 10:59	40m	-6 / -	PE9JAN	- / -	2	✓ Closing fragment
09-02 10:57	40m	-6 / -	YL2CI	-20 / -	4	✓ Closing observed
09-02 10:54	40m	-8 / -	MW0JTZ	- / -23	3	Partial capture
09-02 10:53	40m	-8 / -	DC9GT	- / +1	2	✓ Closing fragment
09-02 10:50	40m	-4 / -	DL1NEO	-15 / -	5	✓ Full exchange observed
09-02 10:42	40m	-5 / -	DG5NAB	- / -20	15	✓ Closing fragment
09-02 10:38	40m	-6 / -	DL6WR	- / +2	4	✓ Closing fragment
09-02 10:37	40m	-13 / -	DC1ASE	- / -	2	✓ Closing fragment
09-02 10:33	40m	-8 / +7	SP7ROM	-13 / -	5	✓ Full exchange observed
09-02 10:31	40m	-9 / -	F4LCT	- / -10	3	Partial capture
09-02 10:26	40m	-6 / -6	OE6PVG	-5 / -	9	✓ Full exchange observed
09-02 10:23	40m	-4 / -11	DL4IAZ	-19 / +6	3	✓ Full exchange observed
09-02 10:16	40m	-5 / +7	HB9CYV	-12 / -	11	✓ Full exchange observed
09-02 10:15	40m	-8 / -	DH1JAD	- / -	2	✓ Closing fragment
09-02 10:06	40m	-4 / -	9A5MP	- / -12	2	✓ Closing fragment
09-02 10:04	40m	-2 / -	US5AT	-19 / -8	4	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
180515  -1 1701  CQ DH3CW JO71
180530  -3 1703  DH3CW RC2Y KO73
180530 -11 1029  DH3CW DK6WS +12
180615  -2 1702  RC2Y DH3CW +05 (x2)
180700  -4 1029  DH3CW DK6WS +12
180715  +4 1702  DK6WS DH3CW R+11
180730  -8 1029  DH3CW DK6WS RR73
180745  -2 1701  DK6WS DH3CW 73
180815  -4 1702  RC2Y DH3CW RR73
180845  +5 1702  DK1GP DH3CW -05
181045  -3 1701  CQ DH3CW JO71                         a1 (x4)

40m

UTC    dB Audio  Message
113945  -2 1735  CQ DH3CW JO71 (x15)

20m

UTC    dB Audio  Message
170815  +5 2006  DH3CW F1TXI R-09
170830 -11 1769  F1TXI DH3CW RR73
170845  +1 2006  DH3CW F1TXI 73
170900 -17 1769  CQ DH3CW JO71
171315  -1 1572  DH3CW IU8JLX RR73
173115  -9  796  DH3CW EA5IXH IM98 (x2)
173245 -14 1768  DH3CW DG5PW R-17
175045 -13 1770  DH3CW <...> (x3)
181030 -12 1769  CQ DH3CW JO71 (x3)
181230  -9 1769  ZS1WH DH3CW -11

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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