ZS5GJK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: South Africa Most frequent locator attributed to this token: KG42

Receiver-side FT8 activity involving ZS5GJK, decoded by SO8OO in southeastern Poland. 65 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-06-23.

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 65 FT8 messages attributed to ZS5GJK as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (98%), followed by 20 m (2%). Most decodes (94%) fell within the six-hour window 09:00-15:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

20m · 1 10m · 64

First attributed message: 2026-06-08
Last attributed message: 2026-06-23 10:53 UTC

Observed FT8 message patterns

Attributed sample: 65 messages
Active dates: 9 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -21 to -6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 28, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 14.

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 ZS5GJK in decoded directed-looking exchanges:

EA3AGF · Spain EC3A · Spain II2WWA · Italy IK2UCJ · Italy IK5OVW · Italy R6DZR · European Russia RA3PN · European Russia RD6OX · European Russia SV2CLJ · Greece SV2FNT · Greece SX0W · Greece UA6HBJ · European Russia

Most frequent locator attributed to ZS5GJK

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: KG42 · 48 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,640 km (approx.)
Last such locator decoded: 2026-06-23 10:53 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	ZS5GJK S/N	Counterpart	Counterpart S/N	Msgs	Capture
07-18 12:21	10m	- / -11	SV2CLJ	-8 / -	2	✓ Closing fragment
07-04 17:22	40m	- / -27	LZ01MIKU	-18 / -	2	Partial capture
07-02 10:12	10m	- / -	F4EBT	-13 / -	9	Partial capture
07-02 08:58	10m	- / -22	SX0W	-11 / -	3	✓ Closing fragment
06-29 13:17	10m	- / -5	II5WWA	+4 / -	2	Partial capture
06-29 13:09	10m	- / -9	UA6HBJ	-8 / -	2	✓ Closing fragment
06-29 12:52	10m	- / -20	RD6OX	+5 / -	2	✓ Closing fragment
06-29 12:46	10m	- / -9	RA3PN	-5 / -	4	✓ Closing fragment
06-29 11:54	10m	- / -	UA3ZNQ	-12 / -	2	Partial capture
06-28 14:31	10m	- / -12	SV2FNT	-4 / -	3	✓ Closing fragment
06-28 11:37	10m	- / -17	UT7IF	0 / -	2	✓ Closing fragment
06-28 10:38	10m	- / -14	R6DZR	-12 / -	2	✓ Closing fragment
06-26 11:42	10m	- / -	RQ6Z	-11 / -	3	Partial capture
06-26 11:29	10m	- / -	OZ1CJT	-16 / -	2	Partial capture
06-24 12:08	10m	- / -14	EA3AGF	-16 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
094915 -24 1591  ZS5GJK IK2UCJ RR73
101245 -14 1940  ZS5GJK F4EBT JN18 (x5)
101545 -15 1556  ZS5GJK II2WWA RR73
101545 -13 1940  ZS5GJK F4EBT JN18 (x4)
124915 -11 1577  ZS5GJK IU2THY -14
122100 -10  737  ZS5GJK SV2CLJ -11 (x2)
125730  -2 2680  ZS5GJK F1PBZ -17

40m

UTC    dB Audio  Message
172230 -16 1648  ZS5GJK LZ01MIKU R-27 (x2)
164445 -19 1499  ZS5GJK UT5ZC -13
165645  -6 2375  ZS5GJK R7DX KN84

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee