DO4MTB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO41

Receiver-side FT8 activity involving DO4MTB, decoded by SO8OO in southeastern Poland. 120 FT8 messages attributed to this token as transmitter, on 160m, 80m, 10m, across 4 UTC dates in the available aggregate history. Observed between 2026-07-02 and 2026-09-18.

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 120 FT8 messages attributed to DO4MTB 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 (78%), followed by 10 m (14%) and 160 m (8%). Several six-hour UTC windows tied for the largest share (86%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (81%); the estimated median was 0 dB.

Overview

120

Messages attributed

UTC dates decoded

Active 15-min windows

0 dB

Estimated median S/N

Bands

160m · 9 80m · 94 10m · 17

First attributed message: 2026-07-02
Last attributed message: 2026-09-18 22:39 UTC

Observed FT8 message patterns

Attributed sample: 120 messages
Active dates: 4 UTC dates
Estimated median S/N: 0 dB
Estimated 10th-90th percentile: -11 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 97.

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 DO4MTB in decoded directed-looking exchanges:

SM7TZK · Sweden ×2 EA1AA · Spain 9A5AFP · Croatia UA4FKT · European Russia 9V1YC · Singapore DL3MIB · Fed. Rep. of Germany DL9KM · Fed. Rep. of Germany DO5OT · Fed. Rep. of Germany DO8JB · Fed. Rep. of Germany EA5GO · Spain F1HSY · France G7RAU · England

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 DO4MTB

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: JO41 · 67 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 916 km (approx.)
Last such locator decoded: 2026-09-18 22:39 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	DO4MTB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-18 22:39	80m	-13 / -25	TA4RC	-13 / -	3	Partial capture
09-18 22:36	80m	-4 / +2	G7RAU	-12 / -	3	✓ Closing observed
09-18 22:34	80m	-10 / +1	DO3LZ	-6 / +3	4	Partial capture
09-18 22:33	80m	-2 / -	IU8TIT	- / -	2	Partial capture
09-18 22:31	80m	+8 / -	II8IHBC	- / -6	2	Partial capture
09-18 22:31	80m	- / -19	RY3F	-14 / -	3	Partial capture
09-18 22:30	80m	-2 / -3	HB9EKJ	-19 / -8	4	✓ Full exchange observed
09-18 22:28	80m	-8 / -13	TA4/DD1WT	-2 / -12	3	Partial capture
09-18 22:26	80m	-6 / +3	S51SLO	+4 / -	3	✓ Closing observed
09-18 22:23	80m	-9 / -8	IU3WOZ	-8 / -5	9	✓ Full exchange observed
09-18 22:16	80m	+2 / -	IZ8KVW	- / -6	3	✓ Closing fragment
09-18 22:14	80m	+7 / -	OK2ZAW	- / -	4	Partial capture
09-18 22:13	80m	+6 / -	YL3PK	-19 / -23	2	✓ Closing observed
09-18 22:11	80m	0 / -14	9A60CBM	-15 / -	2	Partial capture
09-18 22:06	80m	+7 / -	IZ2BKS	-13 / -7	4	✓ Closing observed
09-18 22:05	80m	+12 / -	IQ4JO	- / +6	2	✓ Closing fragment
09-18 22:02	80m	0 / -	OH1LA	- / -13	2	✓ Closing fragment
09-18 22:01	80m	-2 / -	DO5OT	+10 / -	5	✓ Full exchange observed
09-18 21:59	80m	-2 / -	F1HSY	- / -2	2	✓ Closing fragment
09-18 21:58	80m	+2 / -	EA5GO	- / -16	2	✓ Closing fragment
09-18 21:55	80m	+4 / -	SP1BSJ	- / -	4	Partial capture
09-07 23:08	80m	-2 / -	VU2CPL	- / -	10	Partial capture
09-07 23:02	80m	- / -18	9V1YC	-8 / -	2	✓ Closing fragment
09-07 22:59	80m	0 / -14	EM70WWW	+8 / -4	3	Partial capture
09-07 22:56	80m	+5 / -	SP7OK	+2 / -7	5	✓ Closing observed
09-07 22:54	80m	-1 / -4	DL3MIB	+5 / +1	7	✓ Full exchange observed
09-07 22:53	80m	0 / -1	DL9KM	-11 / -9	5	✓ Full exchange observed
09-07 22:52	80m	+2 / -11	OV6ZM	+4 / +2	4	✓ Full exchange observed
09-07 22:48	80m	-3 / 0	SM7TZK	+4 / +6	6	✓ Full exchange observed
09-07 22:48	80m	0 / -4	DO8JB	+2 / +2	18	✓ Full exchange observed
09-07 22:47	80m	+3 / -6	T77NC	-10 / -10	5	✓ Full exchange observed
09-07 22:44	80m	-2 / -	VK6IR	- / -	5	Partial capture
09-07 22:38	160m	-10 / -16	UA4FKT	+4 / -1	5	✓ Full exchange observed
09-07 22:36	160m	-10 / -5	9A5AFP	+2 / -9	7	✓ Full exchange observed
09-07 22:29	160m	-12 / -	R2EA	- / -	3	Partial capture
07-19 13:29	10m	-4 / -	DN9SGE	- / -	2	Partial capture
07-19 13:27	10m	+6 / -	SQ8AA	- / -	2	Partial capture
07-19 13:23	10m	+5 / -	<...>	- / -	6	Partial capture
07-19 13:20	10m	+8 / -	EA1AA	- / -4	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
223200 -12 1375  DO4MTB RY3F -19
223215 +10 2556  II8IHBC DO4MTB R-06
223230 -17 1375  DO4MTB RY3F -19
223315  +0 1483  IU8TIT DO4MTB JO41 (x2)
223430 -11 1248  DO3LZ DO4MTB JO41 (x2)
223515  -6 1248  DO4MTB DO3LZ +01
223530 -12 1248  DO3LZ DO4MTB R+03
223645 -12 2044  DO4MTB G7RAU +02 (x2)
223730  -4 2044  G7RAU DO4MTB 73
223900 -13 1435  TA4RC DO4MTB JO41 (x2)
224015 -13 1436  DO4MTB TA4RC -25

160m

UTC    dB Audio  Message
222900 -11 2532  R2EA DO4MTB JO41 (x3)
223645 -11 1795  9A5AFP DO4MTB JO41
223700  +3 1795  DO4MTB 9A5AFP -05
223715 -12 1795  9A5AFP DO4MTB JO41
223730  +1 1795  DO4MTB 9A5AFP -05
223745  -7 1795  9A5AFP DO4MTB R-09
223800  +2 1795  DO4MTB 9A5AFP RRR
223815  -8 1795  9A5AFP DO4MTB 73
223830  +3 1794  DO4MTB UA4FKT LO23
223845  -9 1795  UA4FKT DO4MTB -01
223900  +5 1795  DO4MTB UA4FKT R-16
223915 -11 1795  UA4FKT DO4MTB RR73
223930  +4 1795  DO4MTB UA4FKT 73

10m

UTC    dB Audio  Message
100200  -9 2509  LZ3SU DO4MTB R-15
100345 -13 2509  GB4LD DO4MTB JO41
132045  +3 2876  EA1AA DO4MTB R-04 (x3)
132345  +7 2758  <...> DO4MTB JO41 (x6)
132745  +5 2758  SQ8AA DO4MTB JO41 (x2)
132930  +4 2758  DN9SGE DO4MTB JO41 (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.

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