R7SF — 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: European Russia Most frequent locator attributed to this token: KN86

Receiver-side FT8 activity involving R7SF, decoded by SO8OO in southeastern Poland. 476 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 35 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-23.

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 476 FT8 messages attributed to R7SF as the transmitting token by decoded message structure across 35 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (91%), followed by 40 m (9%). The busiest six-hour window was 07:00-13:00 UTC, containing 47% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

476

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

40m · 45 20m · 431

First attributed message: 2026-06-06
Last attributed message: 2026-10-23 01:24 UTC

Observed FT8 message patterns

Attributed sample: 476 messages
Active dates: 35 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -20 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 121, moderate (-15 to -9 dB) 131, strong (≥ -8 dB) 224.

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 R7SF in decoded directed-looking exchanges:

CT7BRV · Portugal HZ1IP · Saudi Arabia R7NK · European Russia RD3FY · European Russia RT6C · European Russia RU4I · European Russia

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 R7SF

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: KN86 · 411 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,187 km (approx.)
Last such locator decoded: 2026-10-23 01:24 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	R7SF S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-22 04:09	40m	- / -	R6TA	-16 / -	2	Partial capture
10-21 02:43	40m	- / -4	CT7BRV	0 / -	2	✓ Closing fragment
10-21 02:38	40m	- / -3	HZ1IP	-6 / -	2	✓ Closing fragment
10-14 03:37	40m	- / -	RT6C	+8 / -	2	✓ Closing fragment
10-13 03:39	40m	- / -16	UD8D	-14 / -	2	Partial capture
10-08 01:49	40m	-14 / -	J48S	- / -14	2	Partial capture
10-07 02:56	40m	- / -6	RU4I	-2 / -	4	✓ Closing fragment
10-07 02:56	40m	- / -	UA4FKT	-2 / -	4	Partial capture
10-05 01:44	40m	-8 / -	CM7ADV	- / -	3	Partial capture
10-05 01:37	40m	-22 / -	TA3XEE	- / -10	2	Partial capture
10-04 03:21	40m	-12 / -	KW4BY	- / -	2	Partial capture
10-04 03:11	40m	-14 / -	KK6KC	- / -	2	Partial capture
10-03 02:39	40m	-8 / -	W2SZ	- / -	9	Partial capture
09-29 04:02	40m	- / -11	SV9AUP	-16 / -	2	Partial capture
09-29 03:54	40m	-14 / -11	SV9AUP	-16 / -	4	Partial capture
09-29 03:45	40m	- / -13	OS4K	-20 / -	3	Partial capture
09-29 03:44	40m	-2 / -	R7NK	-6 / -	2	✓ Closing observed
09-29 03:41	40m	-16 / -	VE6WQ	- / -	6	Partial capture
07-28 14:12	20m	-11 / -	6K2MAS	- / -	7	Partial capture
07-27 13:04	20m	-10 / -	CN8PA	- / -	4	Partial capture
07-27 01:13	20m	-4 / -	W3JFK	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
015015 -14  692  J48S R7SF R-14
162045 -13  409  RV3SBS R7SF R-06
013730 -18 2391  DA125RH R7SF KN86
033915 -13 1501  R7SF UD8D -16 (x2)
033700  +7  385  R7SF RT6C KN95 (x2)
023830  -6  980  R7SF HZ1IP -03 (x2)
024345  -1  755  R7SF CT7BRV -04 (x2)
035530  +8  388  R7SF RR73; UT3UZ <...> -06
040945 -17  853  R7SF R6TA LN13 (x2)
012415 -12  308  VU2XZ R7SF KN86

20m

UTC    dB Audio  Message
011345  -4  393  W3JFK R7SF KN86 (x2)
130300 -10  529  OE1VDS R7SF KN86
130445  -3  589  CN8PA R7SF KN86 (x4)
141215  -3  426  6K2MAS R7SF KN86 (x7)

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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