YU4CMB — 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: Serbia Most frequent locator attributed to this token: KN05

Receiver-side FT8 activity involving YU4CMB, decoded by SO8OO in southeastern Poland. 5 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-07-02 and 2026-10-31.

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 5 FT8 messages attributed to YU4CMB 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 -16 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-16 dB

Estimated median S/N

Bands

40m · 5

First attributed message: 2026-07-02
Last attributed message: 2026-10-31 08:23 UTC

Observed FT8 message patterns

Attributed sample: 5 messages
Active dates: 2 UTC dates
Estimated median S/N: -16 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 0.

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 YU4CMB in decoded directed-looking exchanges:

E71DOC · Bosnia-Herzegovina EB3JT · Spain EC3A · Spain F8MRQ · France G4DBW · England IS0CAK · Sardinia LZ1ZF · Bulgaria M9TEY · England OD5KU · Lebanon OH5KNL · Finland R4FDK · European Russia R4HHN · European Russia

Most frequent locator attributed to YU4CMB

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: KN05 · 4 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 497 km (approx.)
Last such locator decoded: 2026-10-31 08:22 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	YU4CMB S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-06 03:17	40m	- / -19	G8KHF	0 / -	4	Partial capture
11-06 03:15	40m	- / -2	TC2TR	-11 / -	2	✓ Closing fragment
11-06 02:53	40m	- / -9	M0PFX	-22 / -	7	Partial capture
11-06 02:31	40m	- / -16	W2CG	-5 / -	7	Partial capture
11-06 02:28	40m	- / -	W2CG	-2 / -	2	Partial capture
11-06 02:12	40m	- / -	W2CG	-6 / -	2	Partial capture
11-06 02:11	40m	- / -19	OD5KU	-12 / -	4	✓ Closing fragment
11-06 02:06	40m	- / -12	R4HHN	-19 / -	3	✓ Closing fragment
11-06 02:00	40m	- / -15	EC3A	-18 / -	2	✓ Closing fragment
11-06 01:56	40m	- / -	W2CG	-10 / -	2	Partial capture
11-06 01:52	40m	- / -	F4NJU	-24 / -	2	Partial capture
11-06 01:49	40m	- / -18	R7BN	-9 / -	2	Partial capture
11-06 01:36	40m	- / -14	R4FDK	-18 / -	7	✓ Closing fragment
11-06 00:51	40m	- / -14	IS0CAK	-11 / -	3	✓ Closing fragment
11-05 21:09	40m	- / -17	SV9QWC	-10 / -	2	Partial capture
11-04 22:09	40m	- / -14	UA6YW	-10 / -	5	✓ Closing fragment
11-04 21:49	40m	- / -22	IK1EZX	-18 / -	2	Partial capture
11-04 21:41	40m	- / -20	IU2VQQ	-20 / -	5	Partial capture
10-31 08:29	40m	- / -14	S55OO	-9 / -	2	✓ Closing fragment
10-31 08:22	40m	-18 / -11	OH5KNL	+6 / -9	6	✓ Full exchange observed
10-31 07:27	40m	- / -5	YO5QDI	-3 / -	3	Partial capture
10-31 07:06	40m	-21 / -13	HB9TVS	-10 / -	2	Partial capture
10-31 06:23	40m	- / -11	LZ1ZF	0 / -	2	✓ Closing fragment
10-30 21:23	40m	- / -15	M9TEY	-13 / -	2	✓ Closing fragment
10-30 21:18	40m	- / -1	F8MRQ	-3 / -	3	✓ Closing fragment
10-30 21:17	40m	- / -13	G4DBW	-3 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
023515  -6  706  YU4CMB W2CG R-09
024815 -13  821  YU4CMB G8GRG IO81
025345 -24 2002  YU4CMB M0PFX R-09 (x7)
031500  -9 1935  YU4CMB TC2TR -02 (x2)
031730  +2  848  YU4CMB G8KHF -19 (x4)

CW

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

Explore CW reception at SO8OO

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