SP5MTX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: KO02

Receiver-side FT8 activity involving SP5MTX, decoded by SO8OO in southeastern Poland. 15 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-11.

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 15 FT8 messages attributed to SP5MTX as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (47%), followed by 60 m (33%) and 40 m (20%). In this small sample, the estimated median decoder S/N was -3 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-3 dB

Estimated median S/N

Bands

80m · 7 60m · 5 40m · 3

First attributed message: 2026-06-08
Last attributed message: 2026-09-11 04:01 UTC

Observed FT8 message patterns

Attributed sample: 15 messages
Active dates: 3 UTC dates
Estimated median S/N: -3 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 13.

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 SP5MTX in decoded directed-looking exchanges:

HK3C · Colombia EK1KE · Armenia J38DX · Grenada PW8BR · Brazil SV5AZK · Dodecanese UB4CJS · European Russia ER1CW · Moldova SV9QWC · Crete

Most frequent locator attributed to SP5MTX

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: KO02 · 9 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 290 km (approx.)
Last such locator decoded: 2026-09-11 04:00 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	SP5MTX S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-11 04:00	80m	+6 / +10	HF100PKP	+2 / -9	3	Partial capture
09-11 03:57	80m	-6 / -9	SN100PKP	-9 / -12	2	Partial capture
09-11 03:17	40m	- / -23	EK1KE	-14 / -	4	✓ Closing fragment
09-11 03:14	40m	- / -10	J38DX	-5 / -	2	✓ Closing fragment
09-11 02:43	40m	- / +1	SV5AZK	-8 / -	2	✓ Closing fragment
09-11 02:41	40m	- / -13	UB4CJS	-10 / -	3	✓ Closing fragment
08-31 22:25	40m	- / -13	PW8BR	-14 / -	3	✓ Closing fragment
08-31 21:49	60m	-4 / -	LY7Z	- / -	2	Partial capture
08-31 21:47	60m	-4 / +4	ER1CW	-10 / -1	5	✓ Full exchange observed
08-31 21:39	80m	+5 / -10	CT7AIU	-15 / -	4	Partial capture
08-31 21:36	80m	- / -	EA5HM	-7 / -	4	Partial capture
08-31 21:35	80m	+10 / -	SV9QWC	- / -	2	✓ Closing fragment
08-24 21:21	20m	- / -11	HK3C	+8 / -	2	✓ Closing fragment
08-05 07:18	20m	- / -5	F4MUD	-9 / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
213630 +11 1504  SV9QWC SP5MTX 73
213645  -8 1806  SP5MTX EA5HM IM99 (x4)
213915  +2  908  CT7AIU SP5MTX KO02
213930 -17  908  SP5MTX CT7AIU -10
213945  +8  908  CT7AIU SP5MTX KO02
214000 -13  908  SP5MTX CT7AIU -07
035745  -9 1746  SP5MTX SN100PKP -09
035800  -6 1746  SN100PKP SP5MTX R-12
040045  +4 1614  HF100PKP SP5MTX KO02
040100  +2 1614  SP5MTX HF100PKP +10
040115  +7 1614  HF100PKP SP5MTX R-09
040200 -18 2578  SP5MTX R2EA -14

40m

UTC    dB Audio  Message
222545 -15  729  SP5MTX PW8BR -13 (x3)
024130  -8 2142  SP5MTX UB4CJS -13 (x3)
024345  -4 1427  SP5MTX SV5AZK +01 (x2)
031400  -4 2835  SP5MTX J38DX -10 (x2)
031700 -13 1498  SP5MTX EK1KE -23 (x4)

60m

UTC    dB Audio  Message
214745  -4 1694  ER1CW SP5MTX KO02
214800 -10 1694  SP5MTX ER1CW +04
214815  -2 1694  ER1CW SP5MTX R-01
214830  -9 1694  SP5MTX ER1CW RR73
214845  -5 1695  ER1CW SP5MTX 73
214945  -3 1766  LY7Z SP5MTX KO02 (x2)

20m

UTC    dB Audio  Message
071845 -15 1464  SP5MTX F4MUD -05 (x5)
212100  +6  875  SP5MTX HK3C -11 (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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