SP4MCH — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: KO03

Receiver-side FT8 activity involving SP4MCH, decoded by SO8OO in southeastern Poland. 97 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-12 and 2026-10-28.

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 97 FT8 messages attributed to SP4MCH as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (58%), followed by 60 m (20%) and 80 m (16%). Most decodes (84%) fell within the six-hour window 14:00-20:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (70%); the estimated median was -5 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

80m · 16 60m · 19 40m · 56 20m · 6

First attributed message: 2026-06-12
Last attributed message: 2026-10-28 18:14 UTC

Observed FT8 message patterns

Attributed sample: 97 messages
Active dates: 9 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -18 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 68.

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 SP4MCH in decoded directed-looking exchanges:

HA1BF · Hungary OE2CAL · Austria OZ9FF · Denmark PD0ACM · Netherlands R3PLN · European Russia R9FE · European Russia TF5B · Iceland UA4FET · European Russia UR5FLN · Ukraine 4X5JK · Israel 9K2GR · Kuwait DF3IS · Fed. Rep. of Germany

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 SP4MCH

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: KO03 · 63 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 400 km (approx.)
Last such locator decoded: 2026-10-28 18:13 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	SP4MCH S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-28 18:14	60m	- / -15	EA1SAL	-12 / -	2	✓ Closing fragment
10-28 18:13	60m	-22 / +9	OH3JF	-8 / -10	5	✓ Full exchange observed
10-28 18:11	60m	-19 / -	DL8UD	-1 / +3	5	✓ Full exchange observed
10-28 18:06	60m	-15 / -4	4X5JK	-12 / -8	5	✓ Full exchange observed
10-28 18:00	60m	-19 / 0	DK0ND	+2 / +1	9	✓ Full exchange observed
10-10 17:08	40m	- / -	UR5FLN	-6 / -	2	✓ Closing fragment
10-10 17:08	60m	- / -13	IK0BAL	-6 / -	2	Partial capture
10-10 17:07	40m	- / +4	HA1BF	-5 / -	2	✓ Closing fragment
10-10 17:03	60m	-6 / -15	DG1LHM	+2 / -2	4	✓ Full exchange observed
10-10 17:02	60m	-6 / -4	S58X	+6 / -5	4	✓ Full exchange observed
10-10 17:00	60m	- / -12	9K2GR	-10 / -	2	Partial capture
10-10 16:57	60m	-14 / -7	DF3IS	+6 / 0	4	✓ Full exchange observed
10-10 16:07	80m	-1 / -14	UR5RBP	-15 / -7	7	✓ Full exchange observed
10-10 15:05	40m	-4 / -	UB9MEU	- / -	3	Partial capture
10-10 15:01	80m	-4 / -	UA6BRD	- / -	4	Partial capture
10-10 14:59	40m	-6 / -	RU1QD	- / -	2	Partial capture
10-03 17:09	40m	-14 / -2	R3PLN	-11 / 0	4	✓ Full exchange observed
10-03 17:05	40m	-14 / -	R6WAU	- / -9	2	Partial capture
10-03 17:01	40m	- / -7	OZ9FF	-4 / -	2	✓ Closing fragment
09-21 16:40	80m	- / 0	EV1R	+10 / -	2	✓ Closing fragment
09-21 16:38	80m	-10 / -	MM0TBH	- / -	2	Partial capture
09-21 16:29	40m	-4 / -	RY9W	- / -	3	Partial capture
09-20 07:18	40m	-12 / -13	TF5B	-19 / -	4	✓ Closing observed
09-20 07:14	40m	-4 / -	KQ4FMX	- / -	2	Partial capture
09-20 07:12	40m	-6 / -	N1IWP	- / -	6	Partial capture
09-20 06:15	40m	-2 / -	N1IWP	- / -	3	Partial capture
09-12 19:27	40m	-2 / -	RU3NCW	- / -	8	Partial capture
09-12 19:24	40m	-4 / -	R1QF	- / -	4	Partial capture
09-12 19:22	40m	-5 / -	UA4FET	-10 / -14	3	✓ Closing observed
09-12 19:20	40m	-7 / -9	R9FE	-8 / +5	5	✓ Full exchange observed
09-12 19:19	40m	-6 / +2	SP9ENV	-4 / -	2	Partial capture
09-12 19:18	40m	-5 / -	RU3NCW	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
180745 -14 1444  4X5JK SP4MCH R-08
180800  -9 1553  SP4MCH 4X5JK RR73
180815 -22 1444  4X5JK SP4MCH 73
181100 -18 1444  DL8UD SP4MCH KO03
181115  -1 1640  SP4MCH DL8UD +13
181130 -20 1444  DL8UD SP4MCH R+03
181145  -1 1640  SP4MCH DL8UD RR73
181200 -18 1444  DL8UD SP4MCH 73
181300 -21 1444  OH3JF SP4MCH KO03
181315  -9 2359  SP4MCH OH3JF +09
181330 -23 1444  OH3JF SP4MCH R-10
181345  -8 2359  SP4MCH OH3JF RR73
181400 -21 1444  OH3JF SP4MCH 73
181445 -10 1202  SP4MCH EA1SAL -15 (x2)

80m

UTC    dB Audio  Message
164030  +9 1473  SP4MCH EV1R +00 (x2)
150145  -4 2456  UA6BRD SP4MCH KO03 (x4)
160700  +0 2471  UR5RBP SP4MCH KO03
160715 -15  752  SP4MCH UR5RBP -14
160730  -5 2471  UR5RBP SP4MCH R-07
160745 -15  752  SP4MCH UR5RBP -14
160800  -1 2471  UR5RBP SP4MCH R-10 (x3)
165315  -3  996  DO2NM SP4MCH KO03
160345  -2 2504  IK0HBN SP4MCH KO03

40m

UTC    dB Audio  Message
170900  -9 1185  SP4MCH R3PLN -02
170915 -13 1842  R3PLN SP4MCH R+00
170930 -13 1185  SP4MCH R3PLN RR73
170945 -16 1842  R3PLN SP4MCH 73
145945  -6 2491  RU1QD SP4MCH KO03 (x2)
150500  -6 2492  UB9MEU SP4MCH KO03 (x3)
170700  -4 1126  SP4MCH HA1BF +04 (x2)
170830  -6 1931  SP4MCH UR5FLN +11 (x2)
171430 +16  740  SP4MCH OE2CAL RR73
171645 -10 1157  SP4MCH PD0ACM RR73

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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