R4FD — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia

Receiver-side FT8 activity involving R4FD, decoded by SO8OO in southeastern Poland. 34 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-18 and 2026-09-20.

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 34 FT8 messages attributed to R4FD 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 (68%), followed by 80 m (32%). In this small sample, the estimated median decoder S/N was -12 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 11 40m · 23

First attributed message: 2026-09-18
Last attributed message: 2026-09-20 05:15 UTC

Observed FT8 message patterns

Attributed sample: 34 messages
Active dates: 2 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -24 to -7 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 8.

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 R4FD in decoded directed-looking exchanges:

EW6DO · Belarus HZ1TT · Saudi Arabia R1IO · European Russia R1QF · European Russia R2EA/P · European Russia R3TIT · European Russia R6OAF · European Russia R9SS · Asiatic Russia RA5AK · European Russia RC3DN · European Russia RD4HX · European Russia RD7O · 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.

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	R4FD S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 05:18	40m	- / -2	RC3DN	-14 / -	3	✓ Closing fragment
09-20 05:13	40m	-20 / -	R6OAF	-12 / +2	3	✓ Closing observed
09-20 05:11	40m	- / -15	OS4K	-16 / -	3	Partial capture
09-20 04:36	40m	- / -3	RM4N	-13 / -	2	✓ Closing fragment
09-20 04:26	40m	-22 / -	DJ0MAB	+3 / -8	4	Partial capture
09-20 04:25	40m	-23 / +2	EW6DO	-17 / -	3	✓ Closing observed
09-20 04:24	40m	- / -8	UC6D	+4 / -	2	✓ Closing fragment
09-20 01:24	80m	-16 / -22	RD4CAF	-10 / -	3	✓ Full exchange observed
09-20 01:20	80m	-20 / -11	RV3YN	+1 / -	5	✓ Full exchange observed
09-20 01:15	80m	-19 / -	R3KLE	-1 / -	4	✓ Closing observed
09-20 01:15	80m	- / -13	YO6LM	+16 / -	2	✓ Closing fragment
09-20 01:13	80m	- / -12	EW8AAC	+1 / -	4	✓ Closing fragment
09-20 01:10	80m	-12 / +2	R4FDD	+2 / -	3	✓ Closing observed
09-20 01:10	80m	- / -3	RX3ASQ	+2 / -	2	✓ Closing fragment
09-20 01:08	80m	- / -13	UA9JTJ/9	-2 / -	2	Partial capture
09-18 19:30	80m	- / -19	R9FE	-8 / -	2	✓ Closing fragment
09-18 19:30	80m	- / -9	RA6LTD	-5 / -	5	Partial capture
09-18 19:14	40m	- / -8	RW6ATD	+13 / -	2	Partial capture
09-18 19:14	40m	-7 / -12	R3TIT	-9 / -	4	✓ Closing observed
09-18 19:11	40m	-8 / -	HZ1TT	- / -	2	✓ Closing fragment
09-18 18:50	40m	-10 / -1	R1IO	-2 / -6	4	✓ Closing observed
09-18 18:45	40m	- / -7	RA5BQ	-8 / -	4	Partial capture
09-18 18:45	40m	-13 / -	RA5AK	- / +9	2	✓ Closing fragment
09-18 18:43	40m	-10 / +4	RD7O	+12 / -8	6	✓ Full exchange observed
09-18 18:40	40m	-9 / -	R1QF	- / 0	3	✓ Closing fragment
09-18 18:33	40m	-2 / -13	R2EA/P	-5 / -	2	✓ Closing observed
09-18 18:06	80m	-24 / -15	R6CW	-4 / +3	3	Partial capture
09-18 17:59	80m	- / -4	R3AQ	-8 / -	2	Partial capture
09-18 17:57	80m	-24 / -8	R2SDZ	+2 / -	4	✓ Closing observed
09-18 17:52	80m	-24 / -9	RZ3ZY	0 / -	4	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
043315  +7 1913  R4FD LZ936BA R-11
043415  +7 2244  R4FD UA3GDJ KO92
043615 -10 2293  R4FD RM4N R-03 (x2)
043815 -19  902  R4FD RD4HX 73
051145 -18 2232  R4FD OS4K -15 (x3)
051345 -20 2175  R6OAF R4FD +02 (x2)
051530 -12 1796  R4FD R6OAF 73
051830 -13 1759  R4FD RU4SO 73
051830 -14 1677  R4FD RC3DN KO95 (x3)

80m

UTC    dB Audio  Message
011515 +14 2362  R4FD YO6LM R-13 (x2)
011545  -2 1818  R4FD R3KLE KO91 (x2)
011630 -19 2215  R3KLE R4FD RR73
011645  +6 1818  R4FD R3KLE 73
012030 -22 2215  RV3YN R4FD +11
012145  -1 2288  R4FD RV3YN R-11 (x2)
012230 -18 2215  RV3YN R4FD RR73
012245  +2 2288  R4FD RV3YN 73
012430 -16 2215  RD4CAF R4FD +15
012545  -9 2219  R4FD RD4CAF R-22 (x2)
012645 -15 1824  R4FD R1QBQ RR73

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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