YT4ZZ — 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: KN04

Receiver-side FT8 activity involving YT4ZZ, decoded by SO8OO in southeastern Poland. 30 FT8 messages attributed to this token as transmitter, on 80m, across 1 UTC dates in the available aggregate history. Last observed 2026-10-18.

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 30 FT8 messages attributed to YT4ZZ as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). In this small sample, the estimated median decoder S/N was -6 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-6 dB

Estimated median S/N

Bands

80m · 30

First attributed message: 2026-10-18
Last attributed message: 2026-10-18 21:04 UTC

Observed FT8 message patterns

Attributed sample: 30 messages
Active dates: 1 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -10 to -1 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 10, strong (≥ -8 dB) 20.

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 YT4ZZ in decoded directed-looking exchanges:

DJ0MAB · Fed. Rep. of Germany PD9JPV · Netherlands UA4FKT · European Russia DD8BA · Fed. Rep. of Germany EA1CGK · Spain ER1CW · Moldova EU1EU · Belarus IU7KEG · Italy R4FDK · European Russia R5DK · European Russia RX3ASQ · European Russia S56UVB · Slovenia

Most frequent locator attributed to YT4ZZ

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: KN04 · 14 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 608 km (approx.)
Last such locator decoded: 2026-10-18 21:03 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	YT4ZZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-18 21:03	80m	-4 / -	IU7KEG	- / -8	2	✓ Closing fragment
10-18 21:01	80m	-12 / -	EA1CGK	- / -14	2	✓ Closing fragment
10-18 20:58	80m	-4 / -11	R5DK	+6 / -7	4	✓ Full exchange observed
10-18 20:57	80m	-4 / -	ER1CW	- / -13	2	✓ Closing fragment
10-18 20:47	80m	-6 / -20	EU1EU	-6 / -8	3	✓ Full exchange observed
10-18 20:46	80m	-8 / -	R4FDK	- / -14	2	✓ Closing fragment
10-18 20:45	80m	-6 / -6	S56UVB	-1 / -	3	✓ Closing observed
10-18 20:40	80m	-11 / -16	SP5GMM	+2 / 0	7	✓ Full exchange observed
10-18 20:37	80m	- / -	RX3ASQ	-10 / -	2	✓ Closing fragment
10-18 20:36	80m	-2 / -	DD8BA	- / -16	2	✓ Closing fragment
10-18 20:23	40m	- / -18	ON8FW	-16 / -	2	Partial capture
10-18 20:20	40m	- / -	ON8FW	-14 / -	2	Partial capture
10-18 20:08	40m	- / -	R1BPW	-17 / -	2	Partial capture
10-18 20:04	40m	- / -	F5TGY	-17 / -	3	Partial capture
10-18 20:03	40m	- / -21	PD9JPV	-19 / -	3	✓ Closing fragment
10-18 20:00	40m	- / -6	UA4FKT	0 / -	3	✓ Closing fragment
10-18 19:51	40m	- / -19	DJ0MAB	+3 / -	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
205815 -10  902  CQ YT4ZZ KN04
205830 +10  902  YT4ZZ R5DK -11
205845  -4  902  R5DK YT4ZZ R-07
205900  +3  902  YT4ZZ R5DK RRR
205915  -4  902  R5DK YT4ZZ 73
205945  +0  902  CQ YT4ZZ KN04 (x3)
210115 -14  902  EA1CGK YT4ZZ -14 (x2)
210215  -9  902  CQ YT4ZZ KN04 (x3)
210345  -6  902  IU7KEG YT4ZZ -08 (x2)

40m

UTC    dB Audio  Message
200130  -1 2452  YT4ZZ UA4FKT 73
200300 -21 2451  YT4ZZ PD9JPV JO22 (x3)
200400 -20 2073  YT4ZZ F5TGY JN38 (x3)
200830 -16 1886  YT4ZZ R1BPW KP50 (x2)
202030 -14 2449  YT4ZZ ON8FW JO20 (x4)
202500  -7 2847  YT4ZZ RX9ABI MO05
203400  -5 2450  YT4ZZ F5SJC JN05

CW

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

Explore CW reception at SO8OO

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