F5SYF — 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: France Most frequent locator attributed to this token: JN15

Receiver-side FT8 activity involving F5SYF, decoded by SO8OO in southeastern Poland. 154 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-10-15.

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 154 FT8 messages attributed to F5SYF as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (38%), followed by 20 m (38%) and 40 m (24%). Several six-hour UTC windows tied for the largest share (71%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

154

Messages attributed

UTC dates decoded

Active 15-min windows

-10 dB

Estimated median S/N

Bands

80m · 59 40m · 37 20m · 58

First attributed message: 2026-06-13
Last attributed message: 2026-10-15 05:49 UTC

Observed FT8 message patterns

Attributed sample: 154 messages
Active dates: 6 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -20 to +3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 34, moderate (-15 to -9 dB) 58, strong (≥ -8 dB) 62.

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 F5SYF in decoded directed-looking exchanges:

F4JUQ · France F8CRS · France R2BDR · European Russia RZ4FWA · European Russia DL9KM · Fed. Rep. of Germany E70SZ · Bosnia-Herzegovina G4FVZ · England IU4DBU · Italy IZ4JMA · Italy OE3FVU · Austria ON5HE · Belgium UX7QV · Ukraine

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 F5SYF

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: JN15 · 86 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,485 km (approx.)
Last such locator decoded: 2026-10-15 05:49 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	F5SYF S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-15 05:48	80m	-17 / -	F1TXI	-11 / -	2	✓ Closing observed
10-15 05:45	80m	-19 / +10	F4GAJ	-12 / +10	4	✓ Full exchange observed
10-15 05:40	80m	-14 / -13	DO1FZL	-3 / -8	6	✓ Full exchange observed
10-15 05:38	80m	-16 / -18	OK1AMF	+2 / -	3	✓ Closing observed
10-15 05:35	80m	- / -	F4GUK	-3 / -	3	Partial capture
10-15 05:35	80m	-12 / +2	G0BLB	-6 / +4	6	✓ Full exchange observed
10-15 05:33	80m	-14 / -	DL8WEM	-2 / -	3	✓ Closing observed
10-15 05:32	80m	-13 / +3	F5PBG	-7 / -	8	✓ Full exchange observed
10-15 05:32	80m	-8 / +7	ON4KEB	-8 / +9	5	✓ Full exchange observed
10-15 05:31	80m	- / -	DO7BE	-18 / -	3	Partial capture
10-15 05:29	80m	-10 / -8	DK7UY	+1 / -	3	✓ Closing observed
10-15 05:28	80m	- / -	ON6CQ	-18 / -	4	Partial capture
10-15 05:27	80m	-13 / -	DJ1NE	0 / -	2	Partial capture
10-15 05:27	80m	-9 / -18	SP1MGM	+10 / +4	10	✓ Full exchange observed
10-15 05:26	80m	-13 / +6	ON7HM	-15 / -	2	Partial capture
10-15 05:25	80m	- / -	DK3WL	-3 / -	7	Partial capture
10-15 05:23	80m	- / -	DK7UY	-4 / -	2	Partial capture
10-15 05:22	80m	- / -8	IQ4JO	+7 / -	3	✓ Closing fragment
10-15 05:00	160m	- / -	DL8WEM	-4 / -	2	Partial capture
10-14 18:23	160m	- / -12	F8CRS	-18 / -	4	✓ Closing fragment
10-12 16:41	80m	-9 / -9	OZ6FH	-14 / 0	5	✓ Full exchange observed
10-12 16:39	80m	-22 / +3	IK1AIL	-20 / -	5	✓ Full exchange observed
10-12 16:38	80m	-23 / -5	DL1IP	+5 / +6	5	✓ Full exchange observed
10-10 06:23	40m	-12 / -	KB3DQI	- / -13	3	Partial capture
10-10 06:23	40m	-13 / -5	DL9KM	-5 / +2	8	✓ Full exchange observed
10-10 06:20	40m	-11 / -	ON5HE	-2 / -	6	✓ Closing observed
10-10 06:20	40m	-10 / -6	IZ4JMA	-7 / +5	4	✓ Full exchange observed
10-09 16:01	80m	-18 / -4	IK2UCK	-11 / -	5	✓ Full exchange observed
10-09 16:01	80m	-15 / -	LY8O	+2 / -4	3	Partial capture
08-26 16:28	40m	-14 / -11	E70SZ	-3 / -6	5	✓ Full exchange observed
08-26 16:11	40m	- / -	IU4DBU	-11 / -	3	✓ Closing fragment
08-26 16:09	40m	- / -1	OE3FVU	-14 / -	2	✓ Closing fragment
08-26 16:05	40m	-16 / -	M0PFX	- / -20	4	Partial capture
08-26 16:01	40m	-15 / -	IK2YYO	-7 / +8	2	Partial capture
08-26 16:01	40m	-14 / -	G4FVZ	-15 / -2	5	✓ Full exchange observed
08-26 15:59	40m	-14 / -9	UX7QV	+5 / -	4	✓ Closing observed
08-26 15:57	40m	-16 / -	PA3MVD	- / 0	2	Partial capture
08-26 15:43	20m	-4 / -	R2BDR	- / -9	2	✓ Closing fragment
08-26 15:42	20m	- / -16	F1ODM	+10 / -	5	Partial capture
08-26 15:39	20m	+6 / -5	RZ4FWA	-10 / -16	5	✓ Full exchange observed
08-26 15:37	20m	- / -17	F1ODM	+11 / -	4	Partial capture
08-26 15:36	20m	+3 / -	HA2ECM	- / -11	2	Partial capture
08-26 15:33	20m	- / -	F4BYA	+12 / -	4	Partial capture
08-26 15:28	20m	+1 / -	7Z1AL	- / -	7	Partial capture
08-26 15:23	20m	-3 / -	IQ4JO	- / -6	2	Partial capture
08-26 15:22	20m	- / -	R3KCW	0 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
054215  -2  740  F5SYF DO1FZL 73
054230  -8 2769  CQ F5SYF JN15 (x2)
054500 -19 2054  F4GAJ F5SYF JN15
054530 -20 2054  CQ F5SYF JN15
054545 -12 2053  F5SYF F4GAJ +10
054600 -15 2054  F4GAJ F5SYF R+10 (x2)
054700 -21 2054  CQ F5SYF JN15 (x2)
054745  -7 1419  F5SYF F4ESO JN39
054800 -17 2054  F1TXI F5SYF R+21
054815 -11 1381  F5SYF F1TXI RR73
054900 -18 2054  CQ F5SYF JN15
054915 -16 2479  F5SYF DO7BE JO64

160m

UTC    dB Audio  Message
181915  -7  705  F5SYF DF4WC R-20
182345 -18 2167  F5SYF F8CRS JN38 (x4)
050015  -6 1403  F5SYF DL8WEM JN48 (x2)
051545 -10  746  F5SYF F4JUQ RR73

40m

UTC    dB Audio  Message
062145  -4  719  F5SYF ON5HE JO20
062200 -12 2470  ON5HE F5SYF +11 (x3)
062315  -5 1401  F5SYF DL9KM JN68
062330 -13 1704  KB3DQI F5SYF -13
062415  -6 1401  F5SYF DL9KM JN68
062430 -10 1704  KB3DQI F5SYF -09
062445  -3 1401  F5SYF DL9KM JN68
062500 -14 1704  KB3DQI F5SYF -09
062515  -7 1401  F5SYF DL9KM JN68 (x2)
062600 -13 1703  DL9KM F5SYF +02
062615  -5 1402  F5SYF DL9KM R-05 (x2)

20m

UTC    dB Audio  Message
154300  -1 1533  CQ F5SYF JN15
154315 +10  851  F5SYF F1ODM -16
154330  -1 1291  R2BDR F5SYF R-09
154345 +12  851  F5SYF F1ODM -16
154400  -6 1291  R2BDR F5SYF 73
154430  -6 1291  CQ F5SYF JN15
154445 +11  851  F5SYF F1ODM -16
154630  -4 2534  CQ F5SYF JN15                         a1 (x8)

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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