DO4TX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO33

Receiver-side FT8 activity involving DO4TX, decoded by SO8OO in southeastern Poland. 18 FT8 messages attributed to this token as transmitter, on 80m, across 4 UTC dates in the available aggregate history. Observed between 2026-08-29 and 2026-09-15.

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 18 FT8 messages attributed to DO4TX as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). In this small sample, the estimated median decoder S/N was -14 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

80m · 18

First attributed message: 2026-08-29
Last attributed message: 2026-09-15 16:39 UTC

Observed FT8 message patterns

Attributed sample: 18 messages
Active dates: 4 UTC dates
Estimated median S/N: -14 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 12, strong (≥ -8 dB) 1.

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 DO4TX in decoded directed-looking exchanges:

DD7EE · Fed. Rep. of Germany DL1EDR · Fed. Rep. of Germany DL1UDO · Fed. Rep. of Germany DO1ID · Fed. Rep. of Germany DO2YJG · Fed. Rep. of Germany DO7MEW · Fed. Rep. of Germany OZ7CL · Denmark PA3EVY · Netherlands

Most frequent locator attributed to DO4TX

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: JO33 · 8 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,091 km (approx.)
Last such locator decoded: 2026-09-03 20:26 UTC

Other locator fields attributed to this token: JN47 (1).

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	DO4TX S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-15 19:52	80m	- / -4	DK7ZT	-4 / -	3	Partial capture
09-15 16:39	80m	-7 / +8	DO1ID	+2 / +10	4	✓ Full exchange observed
09-03 20:26	80m	-16 / -8	PA3EVY	+6 / -10	7	✓ Full exchange observed
09-03 20:23	80m	- / -	DO2HC	+3 / -	2	Partial capture
09-03 20:22	80m	-14 / -	DO9BAU	+3 / -9	16	Partial capture
09-02 20:48	80m	- / -12	OZ7CL	+14 / -	2	✓ Closing fragment
09-02 20:34	80m	- / -10	DK7ZT	-11 / -	5	Partial capture
09-02 20:33	80m	-16 / -	DO2YJG	- / -	2	✓ Closing fragment
09-02 20:31	80m	- / -	DM2GG	-6 / -	11	Partial capture
08-29 20:45	80m	- / -	DL5OAH	-11 / -	3	Partial capture
08-29 20:40	80m	- / +4	DL1EDR	+10 / -	5	✓ Closing fragment
08-29 20:39	80m	- / -	DL5DQZ	+7 / -	4	Partial capture
08-29 20:23	80m	- / -9	DD7EE	+6 / -	2	✓ Closing fragment
08-29 20:08	80m	- / 0	DL5PC	+1 / -	6	Partial capture
08-29 19:31	80m	- / -12	DO7MEW	-6 / -	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
202700  -3 2402  DO4TX DO9BAU JO62
202730  +3 2500  DO4TX PA3EVY -16
202730  +2 2402  DO4TX DO9BAU JO62
202745 -15 2499  PA3EVY DO4TX R-10
202800 +11 2500  DO4TX PA3EVY RR73
202800  +5 2402  DO4TX DO9BAU JO62
202815 -14 2497  PA3EVY DO4TX 73
202930 +16  780  DO4TX SP2GG -17
163915  -9  382  DO1ID DO4TX JN47
163930  +3  381  DO4TX DO1ID +08
163945  -5  382  DO1ID DO4TX R+10
164000  +1  382  DO4TX DO1ID RR73
195200  -2 1116  DO4TX DK7ZT -04 (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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