4Z5TK — 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: Israel Most frequent locator attributed to this token: KM72

Receiver-side FT8 activity involving 4Z5TK, decoded by SO8OO in southeastern Poland. 62 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 2 UTC dates in the available aggregate history. Observed between 2026-07-04 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 62 FT8 messages attributed to 4Z5TK as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (98%), followed by 20 m (2%). In this small sample, the estimated median decoder S/N was -9 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

20m · 1 10m · 61

First attributed message: 2026-07-04
Last attributed message: 2026-10-31 13:27 UTC

Observed FT8 message patterns

Attributed sample: 62 messages
Active dates: 2 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -15 to -2 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 26, strong (≥ -8 dB) 31.

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 4Z5TK in decoded directed-looking exchanges:

F3PI · France ×2 DF2JK · Fed. Rep. of Germany DK5CW · Fed. Rep. of Germany EA5KFI · Spain EA7BEM · Spain F4HGR · France HA7ST · Hungary IU3UJE · Italy IZ8PPI · Italy OK1TOF · Czech Republic SP2DNI · Poland SP2HJN · Poland

Most frequent locator attributed to 4Z5TK

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: KM72 · 30 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,224 km (approx.)
Last such locator decoded: 2026-10-31 13:26 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	4Z5TK S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-03 14:55	10m	- / -12	F3PI	-18 / -	2	✓ Closing fragment
11-03 14:48	10m	- / -	F3PI	-15 / -	3	✓ Closing fragment
11-01 14:29	10m	- / -2	F4HGR	-16 / -	2	✓ Closing fragment
11-01 11:51	10m	- / -	CT2HEX	-15 / -	3	Partial capture
11-01 11:42	10m	- / -	EA6YK	-8 / -	4	Partial capture
10-31 13:26	10m	-10 / -	SP2DNI	- / -7	2	✓ Closing fragment
10-31 13:22	10m	-14 / -	PY2UTY	- / -	2	Partial capture
10-31 13:17	10m	-6 / -	DN9DJE	- / -16	2	Partial capture
10-31 13:14	10m	-8 / -	OK1TOF	- / -9	4	✓ Closing fragment
10-31 12:48	10m	-14 / -	DF2JK	- / -13	4	✓ Closing fragment
10-31 12:46	10m	-13 / -	IZ8PPI	- / -5	3	✓ Closing fragment
10-31 11:42	10m	-8 / -	SP2HJN	- / -3	3	✓ Closing fragment
10-31 11:35	10m	-5 / -	SP2LNY	- / -2	3	✓ Closing fragment
10-31 11:15	10m	-4 / -	RT8T	- / -10	5	Partial capture
10-31 11:14	10m	0 / -	IU3UJE	- / -8	2	✓ Closing fragment
10-31 11:13	10m	-8 / -	HA7ST	- / -7	2	✓ Closing fragment
10-03 16:57	10m	- / -	EA5KFI	-20 / -	2	✓ Closing fragment
08-21 15:49	10m	- / -	DN9BLN	-1 / -	2	Partial capture
08-20 13:40	10m	- / -17	F1PBZ	-10 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
132715  -8 2380  SP2DNI 4Z5TK RR73
114200 -10 2173  4Z5TK EA6YK JM19 (x4)
115145 -19 1539  4Z5TK CT2HEX IM58 (x3)
142945 -16  941  4Z5TK F4HGR R-02 (x2)
144845 -17 2009  4Z5TK F3PI JN25 (x5)

CW

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

Explore CW reception at SO8OO

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