4Z5JO — 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

Receiver-side FT8 activity involving 4Z5JO, decoded by SO8OO in southeastern Poland. 140 FT8 messages attributed to this token as transmitter, on 60m, 40m, across 6 UTC dates in the available aggregate history. Observed between 2026-10-10 and 2026-10-17.

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 140 FT8 messages attributed to 4Z5JO as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (93%), followed by 60 m (7%). Several six-hour UTC windows tied for the largest share (77%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

140

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

60m · 10 40m · 130

First attributed message: 2026-10-10
Last attributed message: 2026-10-17 04:15 UTC

Observed FT8 message patterns

Attributed sample: 140 messages
Active dates: 6 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -16 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 19, moderate (-15 to -9 dB) 42, strong (≥ -8 dB) 79.

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 4Z5JO in decoded directed-looking exchanges:

EA7FU · Spain RN6HK · European Russia US0QV · Ukraine W4FO · United States YO4DW · Romania YO9XC · Romania

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.

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	4Z5JO S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-17 04:14	40m	-18 / -	KD9WTA	- / -	2	Partial capture
10-17 04:11	40m	-17 / -	KC2NJ	- / -	2	Partial capture
10-17 04:09	40m	-17 / -8	RN6HK	-12 / +1	8	✓ Full exchange observed
10-17 04:05	40m	-18 / -16	UR4QWW	-21 / -	5	Partial capture
10-17 04:04	40m	-17 / -	MI7XHT	- / -17	2	Partial capture
10-17 04:04	40m	- / -	IU8RFW	-7 / -	3	Partial capture
10-17 04:04	40m	-16 / -	SV1MOZ	-17 / -7	3	Partial capture
10-17 04:00	40m	-15 / -	YY5EHT	- / -	7	Partial capture
10-17 03:58	40m	-14 / -	NP4VA	- / -12	3	Partial capture
10-17 03:56	40m	-13 / -	KD9TAW	- / -	4	Partial capture
10-17 03:52	40m	-16 / -	KD9TAW	- / -	2	Partial capture
10-17 03:50	40m	- / -22	W4FO	-23 / -	2	✓ Closing fragment
10-16 04:48	40m	- / -15	US0QV	-10 / -	3	✓ Closing fragment
10-16 04:42	40m	- / -	US0QV	-10 / -	3	Partial capture
10-16 04:35	40m	- / -	UR4QWW	-15 / -	4	Partial capture
10-16 04:34	40m	- / -	RV6F	-10 / -	2	Partial capture
10-16 04:34	40m	- / -8	EA7FU	-8 / -	2	✓ Closing fragment
10-15 19:31	40m	- / -	IU8RFW	-4 / -	4	Partial capture
10-15 19:30	40m	- / -	OH6LPK	-12 / -	2	Partial capture
10-15 19:20	40m	-7 / -	YO2UKG	- / -	2	Partial capture
10-15 19:14	60m	- / -	DL3DQL/P	+10 / -	2	Partial capture
10-15 19:14	60m	- / -	G0AZH	-7 / -	3	Partial capture
10-15 19:13	60m	- / -	DB6LL	+3 / -	3	Partial capture
10-15 19:13	60m	- / -9	DK7ZT	-3 / -	3	Partial capture
10-15 19:12	60m	- / -	YO2MKL	-15 / -	2	Partial capture
10-15 19:12	60m	- / -	G3SUY	-2 / -	4	Partial capture
10-15 19:12	60m	- / -	SP1MGM	-4 / -	4	Partial capture
10-15 19:10	60m	-8 / -1	4L7T	-8 / -	9	Partial capture
10-15 19:08	60m	-5 / +10	TA4SSK	-14 / -	4	Partial capture
10-15 18:56	40m	-8 / -	HG5OGI	- / -15	2	Partial capture
10-15 18:54	40m	-7 / -	RZ4FWA	- / -22	2	Partial capture
10-15 18:54	40m	- / -	F4BYA	+5 / -	4	Partial capture
10-15 18:49	40m	-5 / +8	IZ4AIF	+5 / -10	11	Partial capture
10-15 18:47	40m	-6 / -	YO2UKG	- / -	2	Partial capture
10-15 18:36	40m	-6 / -	EY7BM	- / -12	11	Partial capture
10-13 15:37	40m	- / -1	YO9XC	+2 / -	2	✓ Closing fragment
10-13 15:10	40m	- / -14	YO4DW	0 / -	2	✓ Closing fragment
10-11 19:16	40m	-8 / -21	RY7G	-11 / -	2	Partial capture
10-11 19:03	40m	-3 / -	LZ4VR	- / -5	11	Partial capture
10-11 19:00	40m	-5 / -	EY7BM	- / -	2	Partial capture
10-10 19:17	40m	-7 / -	S53AK	- / -10	2	Partial capture
10-10 19:14	40m	-6 / -	OE3UKW	- / -15	4	Partial capture
10-10 19:13	40m	-12 / -	JY4CH	- / -	2	Partial capture
10-10 19:11	40m	-13 / -	BG0FQU	- / -	3	Partial capture
10-10 19:09	40m	-3 / -	ER1BF	- / -5	3	Partial capture
10-10 19:03	40m	-9 / -	HS0ZOY	- / -	2	Partial capture
10-10 19:01	40m	-12 / -	Z62NS	- / -	2	Partial capture
10-10 18:59	40m	-16 / -	EX7CQ	- / -	2	Partial capture
10-10 18:55	40m	-16 / -	TJ1GD	- / -	3	Partial capture
10-10 18:37	40m	-3 / -	BG9IVV	- / -	6	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
040645 -20 1398  4Z5JO UR4QWW R-16
040700 -18 1183  UR4QWW 4Z5JO RRR
040730 -16 1184  TA3XEE 4Z5JO -11
040945 -15 1182  4Z5JO RN6HK LN14 (x2)
041030 -15 1182  RN6HK 4Z5JO +01 (x2)
041115  -8 1182  4Z5JO RN6HK R-08
041130 -16 1182  KC2NJ 4Z5JO (x2)
041215 -10 1182  4Z5JO RN6HK R-08
041230 -18 1181  RN6HK 4Z5JO RRR
041245 -13 1182  4Z5JO RN6HK 73
041445 -17 1181  KD9WTA 4Z5JO (x2)

60m

UTC    dB Audio  Message
191315  -3  281  4Z5JO 4L7T -05
191330  -5  955  CQ 4Z5JO
191345  -2  805  4Z5JO SP1MGM JO73
191345  -2  601  4Z5JO G3SUY JO01
191345  -3 2483  4Z5JO DK7ZT -09
191345  +4  483  4Z5JO DB6LL JO43
191415  -5  631  4Z5JO G0AZH IO83
191415  +9  364  4Z5JO DL3DQL/P JO61
191415  -3 2483  4Z5JO DK7ZT -09
191415  +3  483  4Z5JO DB6LL JO43
191445 +10  364  4Z5JO DL3DQL/P JO61
191445  -3 2483  4Z5JO DK7ZT -09
191445  +1  483  4Z5JO DB6LL JO43
191515 -10  631  4Z5JO G0AZH IO83 (x2)

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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