DL1SF — 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: Fed. Rep. of Germany Most frequent locator attributed to this token: JO41

Receiver-side FT8 activity involving DL1SF, decoded by SO8OO in southeastern Poland. 46 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-08 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 46 FT8 messages attributed to DL1SF as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (63%), followed by 20 m (37%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

40m · 29 20m · 17

First attributed message: 2026-06-08
Last attributed message: 2026-10-15 13:33 UTC

Observed FT8 message patterns

Attributed sample: 46 messages
Active dates: 5 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -16 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 21, strong (≥ -8 dB) 18.

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 DL1SF in decoded directed-looking exchanges:

9A4ZM · Croatia DB2VS · Fed. Rep. of Germany DK7ZT · Fed. Rep. of Germany DL7PIA · Fed. Rep. of Germany G8KHF · England PD5RAY · Netherlands PE1NPS · Netherlands RX3VF · European Russia SP6FME · Poland

Most frequent locator attributed to DL1SF

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: JO41 · 22 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 916 km (approx.)
Last such locator decoded: 2026-10-15 13:32 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	DL1SF S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-15 13:32	40m	-11 / -	PD5RAY	- / -	2	✓ Closing fragment
10-15 13:30	40m	-6 / -	PE1NPS	-11 / -	3	✓ Closing observed
10-15 13:29	40m	-12 / -	DK7ZT	-5 / -	6	✓ Full exchange observed
10-15 13:28	40m	-4 / -	DB2VS	- / +8	3	✓ Closing fragment
10-15 13:26	40m	-12 / -	G8KHF	- / -2	2	✓ Closing fragment
10-11 15:52	40m	+3 / -	RX3VF	-9 / -	2	✓ Closing observed
10-11 15:51	40m	0 / -7	SP6FME	+3 / +7	4	✓ Full exchange observed
10-11 15:45	40m	+2 / -	8S2A	- / -	5	Partial capture
10-06 14:29	40m	-16 / -8	9A4ZM	-3 / -	5	✓ Full exchange observed
10-06 14:27	40m	-14 / -1	DL7PIA	-8 / +3	5	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
132715 -10 1580  G8KHF DL1SF 73
132830  -4  974  DB2VS DL1SF JO41 (x3)
132945  -2 2488  DL1SF DK7ZT +20
133000  -5  974  PE1NPS DL1SF +20
133015  -5 2488  DL1SF DK7ZT +20
133030  -6  974  PE1NPS DL1SF RR73
133045 -11  462  DL1SF PE1NPS 73
133045  -9 2488  DL1SF DK7ZT +20
133100 -14  974  DK7ZT DL1SF R+30
133115  -5 2488  DL1SF DK7ZT RR73
133130  -9  974  DK7ZT DL1SF 73
133215 -13  974  PD5RAY DL1SF JO41 (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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