4O/PD0MDX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Montenegro

Receiver-side FT8 activity involving 4O/PD0MDX, decoded by SO8OO in southeastern Poland. 14 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-02 and 2026-09-12.

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 14 FT8 messages attributed to 4O/PD0MDX as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 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

40m · 14

First attributed message: 2026-09-02
Last attributed message: 2026-09-12 16:23 UTC

Observed FT8 message patterns

Attributed sample: 14 messages
Active dates: 2 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) 6, moderate (-15 to -9 dB) 6, strong (≥ -8 dB) 2.

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 4O/PD0MDX in decoded directed-looking exchanges:

4X1UF · Israel 9A4ZM · Croatia IZ3KIF · Italy

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	4O/PD0MDX S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 15:42	40m	- / -	DL6UM	0 / -	2	Partial capture
09-12 17:06	40m	- / -	DL3BH	-12 / -	3	Partial capture
09-12 16:24	40m	- / -	UB6LUR	-5 / -	3	Partial capture
09-12 16:23	40m	- / -	DJ0MAB	+14 / -	2	Partial capture
09-12 16:22	40m	- / -	IN3JRZ	+4 / -	2	Partial capture
09-12 16:21	40m	- / -	<...>	+12 / -	2	✓ Closing fragment
09-02 18:16	40m	- / -	I1RJP	-2 / -	6	Partial capture
09-02 18:07	40m	- / -11	DM8MH	-6 / -	2	Partial capture
09-02 17:44	40m	- / -	DL1JEL	+9 / -	2	Partial capture
09-02 17:31	40m	- / -	OZ27T	-14 / -	3	Partial capture
09-02 17:30	40m	- / +2	LZ3YY	-4 / -	4	Partial capture
09-02 17:22	40m	- / -	SQ9SF	-9 / -	9	Partial capture
09-02 17:17	40m	- / -	G4DBW	-9 / -	2	Partial capture
09-02 17:16	40m	- / -10	UX7QV	+11 / -	2	Partial capture
09-02 17:15	40m	- / -	EA5GO	-12 / -	2	Partial capture
09-02 17:15	40m	- / -	LA6SLA	-7 / -	5	Partial capture
09-02 17:14	40m	- / -14	DF3IS	+8 / -	2	Partial capture
09-02 17:13	40m	- / -	<...>	+9 / -	3	✓ Closing fragment
09-02 17:10	40m	-11 / -	EA7AZH	- / -7	2	Partial capture
09-02 17:07	40m	- / -	OE1RIG	-3 / -	2	Partial capture
09-02 17:05	40m	-14 / -12	R2SN	0 / -7	5	Partial capture
09-02 17:03	40m	-18 / +4	9A4ZM	-6 / -	2	✓ Closing observed
09-02 17:00	40m	- / -	<...>	-8 / -	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
162230 +15 2893  4O/PD0MDX <...> RR73
162245  -4 2893  IZ3KIF 4O/PD0MDX 73
162300  +5  891  4O/PD0MDX IN3JRZ JN56
162315  -5 2893  CQ 4O/PD0MDX
162330  -5  891  4O/PD0MDX IN3LHF -12
162330 +16 2893  4O/PD0MDX DJ0MAB JN49
162430  -4  890  4O/PD0MDX UB6LUR KN97
162430 +13 2893  4O/PD0MDX DJ0MAB JN49
162500  -5  890  4O/PD0MDX UB6LUR KN97 (x2)
170615 -15  893  4O/PD0MDX DL3BH JN48 (x3)
154245  -1  890  4O/PD0MDX DL6UM JO60 (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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