RA4RF — 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: LO55

Receiver-side FT8 activity involving RA4RF, decoded by SO8OO in southeastern Poland. 59 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-20 and 2026-10-01.

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 59 FT8 messages attributed to RA4RF as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -7 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-7 dB

Estimated median S/N

Bands

40m · 59

First attributed message: 2026-09-20
Last attributed message: 2026-10-01 15:31 UTC

Observed FT8 message patterns

Attributed sample: 59 messages
Active dates: 2 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -13 to +1 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 34.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with RA4RF in decoded directed-looking exchanges:

ES2AJ · Estonia F8MRQ · France PA7D · Netherlands R2DAW · European Russia R3DIH · European Russia R3LDK · European Russia R3PA · European Russia R5GG · European Russia R7DX · European Russia R9FGJ · European Russia RA4CIY · European Russia RA5AK · European Russia

Most frequent locator attributed to RA4RF

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: LO55 · 19 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,045 km (approx.)
Last such locator decoded: 2026-10-01 15:31 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	RA4RF S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-01 15:31	40m	- / -	DL6UM	-2 / -	2	Partial capture
10-01 15:27	40m	-12 / -	UB8LAR	- / -17	3	✓ Closing fragment
10-01 15:26	40m	-13 / +2	R7DX	-7 / +3	9	✓ Full exchange observed
10-01 15:26	40m	- / -	DL9KM	-6 / -	7	Partial capture
10-01 15:25	40m	-12 / -	UB4FGK	- / -9	2	✓ Closing fragment
10-01 15:23	40m	-10 / -	UB4HVA	- / -14	2	✓ Closing fragment
10-01 15:22	40m	-10 / -	DL2VPO	+8 / -16	3	Partial capture
10-01 15:21	40m	-11 / -	R3DIH	+1 / -	2	✓ Closing observed
10-01 15:20	40m	-14 / -	RA4CIY	- / -7	2	✓ Closing fragment
10-01 15:18	40m	-16 / +9	R3PA	-13 / -4	5	✓ Full exchange observed
10-01 15:17	40m	-12 / -	R5GG	-19 / -5	3	✓ Closing observed
10-01 15:12	40m	-10 / -	R2DAW	-10 / -2	3	✓ Closing observed
10-01 15:11	40m	-10 / -	R9FGJ	- / -8	2	✓ Closing fragment
10-01 15:09	40m	-10 / +1	SP9EVL	+1 / -12	5	✓ Full exchange observed
09-20 18:21	40m	-5 / -6	F8MRQ	-3 / -23	16	✓ Full exchange observed
09-20 18:18	40m	-6 / -	UB6LWX	-8 / -7	3	✓ Closing observed
09-20 18:16	40m	-6 / -	PA7D	- / -18	2	✓ Closing fragment
09-20 18:16	40m	- / -	R3RBB	-8 / -	2	Partial capture
09-20 18:14	40m	- / -	F8MRQ	-2 / -	2	Partial capture
09-20 18:13	40m	- / -	EA1EMO	-6 / -	2	Partial capture
09-20 18:07	40m	- / -	F8MRQ	0 / -	4	Partial capture
09-20 18:06	40m	- / +6	RV3X	+4 / -	4	✓ Closing fragment
09-20 18:06	40m	- / +5	RA6FC	+2 / -	2	Partial capture
09-20 18:05	40m	- / -2	RA5AK	-6 / -	2	✓ Closing fragment
09-20 18:01	40m	- / -	F8MRQ	-6 / -	3	Partial capture
09-20 18:00	40m	- / -	DL3JHK	-2 / -	3	Partial capture
09-20 18:00	40m	0 / +1	ES2AJ	+16 / -5	5	✓ Full exchange observed
09-20 18:00	40m	+1 / -	R3LDK	+7 / -4	5	✓ Full exchange observed
09-20 17:57	40m	+1 / -	UA9CR	- / -12	2	✓ Closing fragment
09-20 17:55	40m	-6 / -	RL3QGD	- / -5	2	✓ Closing fragment
09-20 17:48	40m	- / -7	R3YAU	-5 / -	2	Partial capture
09-20 17:47	40m	+2 / -	TC2EYL	-4 / -8	3	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
152745  -5 1433  RA4RF DL9KM JN68
152800 -13 1291  UB8LAR RA4RF -17
152815  -7 1488  RA4RF R7DX KN84
152815  -4 1433  RA4RF DL9KM JN68
152845  -6 1488  RA4RF R7DX KN84
152845 -11 1433  RA4RF DL9KM JN68
152900  -9 1291  UB8LAR RA4RF RR73
152915  -5 1487  RA4RF R7DX KN84
152915  -5 1433  RA4RF DL9KM JN68
152930 -13 1291  R7DX RA4RF +03
152945  -8 1487  RA4RF R7DX R+02 (x2)
153100 -11 1291  CQ RA4RF LO55
153145  -4  791  RA4RF DL6UM JO60 (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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