SV4SO — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Greece Most frequent locator attributed to this token: KM19

Receiver-side FT8 activity involving SV4SO, decoded by SO8OO in southeastern Poland. 81 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 15 UTC dates in the available aggregate history. Observed between 2026-06-28 and 2026-09-12.

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 81 FT8 messages attributed to SV4SO as the transmitting token by decoded message structure across 15 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (57%), followed by 40 m (42%) and 20 m (1%). Several six-hour UTC windows tied for the largest share (62%), so no unique busiest interval is claimed. 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

80m · 46 40m · 34 20m · 1

First attributed message: 2026-06-28
Last attributed message: 2026-09-12 01:16 UTC

Observed FT8 message patterns

Attributed sample: 81 messages
Active dates: 15 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -21 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 26, moderate (-15 to -9 dB) 40, strong (≥ -8 dB) 15.

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 SV4SO in decoded directed-looking exchanges:

IK2UCL · Italy ×3 II1WWA · Italy ×2 IQ8BV · Italy ×2 SQ8AZT · Poland ×2 F5IXN · France JY5IB · Jordan LZ1ZF · Bulgaria TM2WWA · France UP7WWA · Kazakhstan II8WWA · Italy IQ0AAI · Sardinia IT9ECY · Sicily

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.

Most frequent locator attributed to SV4SO

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: KM19 · 50 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,164 km (approx.)
Last such locator decoded: 2026-09-12 01:16 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	SV4SO S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-18 05:50	40m	- / -	DL3MIB	+9 / -	5	Partial capture
09-18 05:50	40m	- / -	UA4FKT	-5 / -	2	Partial capture
09-18 05:49	40m	- / -14	IQ0AAI	-6 / -	2	✓ Closing fragment
09-12 01:16	80m	-11 / -	EH3ST	- / -7	2	Partial capture
09-03 04:23	40m	-12 / -	IT9ECY	-15 / -25	9	✓ Closing observed
08-20 17:19	40m	- / -	SP6AXW	-6 / -	6	Partial capture
08-20 17:12	20m	- / -8	IK2UCL	-17 / -	6	✓ Closing fragment
08-20 04:10	40m	-13 / -	IK2UCL	-6 / -3	4	✓ Closing observed
08-07 18:03	40m	-18 / -	SP7VCL	- / -	2	Partial capture
07-20 21:38	40m	-18 / -	IQ8BV	- / -	3	✓ Closing fragment
07-20 21:31	40m	-18 / -	IQ8BV	- / -	2	✓ Closing fragment
07-20 20:54	80m	-11 / +3	IQ8BV	-10 / 0	5	✓ Full exchange observed
07-20 04:09	40m	-21 / -	IT9ECY	- / -19	2	Partial capture
07-13 20:29	40m	-16 / -	SQ5OMY	- / -24	2	✓ Closing fragment
07-11 20:08	20m	- / -14	7Z1BM	-8 / -	2	Partial capture
07-10 20:42	80m	-6 / -	ZS6WAB	- / -	6	Partial capture
07-10 20:34	80m	-9 / -	<...>	- / -	2	Partial capture
07-08 15:58	20m	- / -13	JY5IB	-13 / -	2	✓ Closing fragment
07-07 20:30	40m	-14 / -15	SQ8AZT	-11 / -7	4	✓ Full exchange observed
07-07 19:50	80m	-13 / -	SQ8AZT	+16 / -16	3	✓ Closing observed
07-07 18:32	20m	- / -7	LZ1ZF	-8 / -	2	✓ Closing fragment
07-07 09:36	10m	- / -11	<...>	-12 / -	2	Partial capture
07-06 21:09	80m	- / -	SP6FME	+8 / -	2	Partial capture
07-06 21:06	80m	-16 / -	<...>	- / +2	3	Partial capture
07-06 21:01	80m	- / -	9A5E	+9 / -	2	Partial capture
07-06 20:56	80m	-12 / -	LZ01MIKU	+5 / -	4	Partial capture
07-06 20:53	80m	- / -8	SV6DBG	0 / -	2	Partial capture
07-06 20:52	80m	-11 / -	LZ01MIKU	+7 / +9	3	Partial capture
07-06 18:43	40m	-14 / -	<...>	- / -	3	Partial capture
07-05 02:24	80m	-16 / -	K2K	- / -	15	Partial capture
07-03 21:28	40m	- / +1	II8WWA	-15 / -	2	✓ Closing fragment
07-02 11:22	20m	- / -10	F5IXN	-17 / -	5	✓ Closing fragment
06-29 04:44	20m	- / -25	GB2WWA	-6 / -	2	Partial capture
06-29 04:34	20m	- / -	TM2WWA	+1 / -	2	✓ Closing fragment
06-28 19:57	80m	-9 / -23	UA4FKT	+9 / -9	5	✓ Full exchange observed
06-28 19:55	80m	-10 / -6	<...>	-12 / -16	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
042515 -11 2104  IT9ECY SV4SO R-25 (x4)
042730 -15 2102  SV4SO IT9ECY RR73
043100 -17 2078  SV4SO DL9KM JN68
054930  -7  730  SV4SO IQ0AAI -14 (x2)
055030  -7  727  SV4SO UA4FKT LO23
055030  +6  831  SV4SO DL3MIB JN57
055100  -3  728  SV4SO UA4FKT LO23
055200 +12  831  SV4SO DL3MIB JN57 (x4)

80m

UTC    dB Audio  Message
203430 +10 1617  SV4SO LZ01MIKU -02
203445  -7  806  <...> SV4SO R+13
204215 -13  806  ZS6WAB SV4SO KM19 (x6)
205445  -7 1902  IQ8BV SV4SO KM19
205500 -14 1904  SV4SO IQ8BV +03
205515  -7 1901  IQ8BV SV4SO R+00
205530  -7 1904  SV4SO IQ8BV RR73
205545 -19 1902  IQ8BV SV4SO 73
011615  -9 1500  EH3ST SV4SO KM19 (x2)

20m

UTC    dB Audio  Message
112430 -18 1904  SV4SO F5IXN 73
112930 -18 1502  SV4SO <...> -09
183245  -8  677  SV4SO LZ1ZF -07 (x2)
155845 -13 1743  SV4SO JY5IB -13 (x2)
200815  -7  880  SV4SO 7Z1BM -14 (x2)
171245 -19 1385  SV4SO IK2UCL -08 (x6)
164445 -14  620  RI1FJL SV4SO -14

10m

UTC    dB Audio  Message
101600 -14 1795  SV4SO F4FSY -13
093630 -14  880  SV4SO <...> -11 (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.

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