RA4CFX — 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: LO42

Receiver-side FT8 activity involving RA4CFX, decoded by SO8OO in southeastern Poland. 751 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 11 UTC dates in the available aggregate history. Observed between 2026-07-26 and 2026-10-21.

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 751 FT8 messages attributed to RA4CFX as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (54%), followed by 160 m (41%) and 40 m (4%). Most decodes (85%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14.1 dB.

Overview

751

Messages attributed

UTC dates decoded

Active 15-min windows

-14.1 dB

Estimated median S/N

Bands

160m · 311 80m · 403 40m · 33 20m · 4

First attributed message: 2026-07-26
Last attributed message: 2026-10-21 19:02 UTC

Observed FT8 message patterns

Attributed sample: 751 messages
Active dates: 11 UTC dates
Estimated median S/N: -14.1 dB
Estimated 10th-90th percentile: -23 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 314, moderate (-15 to -9 dB) 313, strong (≥ -8 dB) 124.

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 RA4CFX in decoded directed-looking exchanges:

ES2AJ · Estonia ×2 R3RB · European Russia ×2 RA3YDA · European Russia ×2 RK6MC · European Russia ×2 RM1O · European Russia ×2 RN7T · European Russia ×2 RU3VT · European Russia ×2 S58T · Slovenia ×2 UA3PY · European Russia ×2 UA4CKN · European Russia ×2 UN0GY · Kazakhstan ×2 IU2THY · Italy ×2

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 RA4CFX

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: LO42 · 328 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,905 km (approx.)
Last such locator decoded: 2026-10-21 19:02 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	RA4CFX S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-21 18:57	160m	-12 / -	RM1O	- / -5	2	✓ Closing fragment
10-21 18:56	160m	-8 / -2	UA3ADE	+4 / -5	5	✓ Full exchange observed
10-21 18:54	160m	- / -6	DK7ZT	+1 / -	2	Partial capture
10-21 18:53	160m	- / 0	R6HV	-14 / -	2	✓ Closing fragment
10-21 18:51	160m	-10 / -11	EW4M	+18 / -8	4	✓ Full exchange observed
10-21 18:41	80m	- / -	I4VOL	-6 / -	2	Partial capture
10-21 18:33	80m	-8 / -	RX1AB	-9 / -13	4	Partial capture
10-21 18:31	80m	- / +5	R2FEA	+6 / -	2	✓ Closing fragment
10-21 18:29	80m	- / -	OE3IPU	+15 / -	2	Partial capture
10-21 18:27	80m	- / -	ON6MX	+2 / -	2	Partial capture
10-21 18:27	80m	-8 / -8	UB3LBU	+3 / -3	5	✓ Full exchange observed
10-21 18:21	80m	-2 / -3	RA6OY	+6 / 0	4	✓ Full exchange observed
10-21 18:18	80m	-10 / -5	UA1TAN	+2 / -16	2	Partial capture
10-21 18:14	80m	-8 / -10	R6DJR	-10 / +3	3	✓ Full exchange observed
10-21 18:13	80m	- / -9	UB3LCO	+5 / -	3	✓ Closing fragment
10-21 18:12	80m	- / -	S58T	+14 / -	2	✓ Closing fragment
10-21 18:07	80m	- / 0	R2PA	+4 / -	2	✓ Closing fragment
10-21 18:06	80m	- / 0	RK4UZ	+6 / -	4	✓ Closing fragment
10-21 18:05	160m	-14 / -	RA3RGQ	- / -	2	Partial capture
10-21 17:49	160m	- / -	IK4HPW	-14 / -	2	Partial capture
10-21 17:43	160m	-13 / -	UA9AX	- / -9	2	✓ Closing fragment
10-21 17:42	160m	-14 / -	RU3OZ	-20 / 0	4	✓ Full exchange observed
10-21 17:39	160m	-14 / 0	UA3D	+1 / 0	5	✓ Full exchange observed
10-21 17:38	160m	-13 / -	UA6J	- / -12	2	✓ Closing fragment
10-21 17:34	160m	-15 / -5	OH5KNL	-6 / -3	5	✓ Full exchange observed
10-21 17:26	160m	-15 / -13	SV1EKI	-15 / -13	7	✓ Full exchange observed
10-21 17:20	160m	-15 / -2	RA3YDA	-7 / -11	5	✓ Full exchange observed
10-21 17:20	160m	-14 / -	R2ATY	- / -19	2	✓ Closing fragment
10-21 17:18	160m	-14 / 0	RK6MC	-6 / -4	4	✓ Full exchange observed
10-21 17:16	160m	-16 / -3	RN7T	-4 / -11	5	✓ Full exchange observed
10-21 17:04	80m	- / -	DL6UM	-4 / -	3	Partial capture
10-21 17:02	80m	-11 / -4	RQ7O	-1 / +1	5	✓ Full exchange observed
10-21 17:01	80m	-12 / -	RM1O	+2 / -2	3	✓ Closing observed
10-21 16:58	80m	-10 / -4	9A3TGT	-5 / -7	7	✓ Full exchange observed
10-21 16:58	80m	-10 / -1	DF5AU	+9 / -8	8	✓ Full exchange observed
10-21 16:58	80m	- / -	DK2MAX	0 / -	7	Partial capture
10-21 16:58	80m	- / -	DO1MDO	-6 / -	7	Partial capture
10-21 16:53	80m	- / -3	YT7DX	-8 / -	3	Partial capture
10-21 16:52	80m	- / -5	R2DR	+3 / -	3	✓ Closing fragment
10-21 16:52	80m	- / -9	R3SE	-16 / -	2	Partial capture
10-21 16:48	80m	- / -	DK2MAX	-2 / -	2	Partial capture
10-21 16:48	80m	- / -	R2DX/3	-11 / -	2	✓ Closing fragment
10-21 16:46	80m	-22 / -	R0AY	- / -	2	✓ Closing fragment
10-21 16:42	80m	-13 / -	RX7O	- / -1	2	✓ Closing fragment
10-21 16:40	80m	-15 / -	UN0GY	- / -13	3	✓ Closing fragment
10-21 16:33	80m	- / +3	UA3GJM	+3 / -	2	✓ Closing fragment
10-21 16:31	80m	-7 / -2	UB6HQQ	-11 / -	3	✓ Closing observed
10-21 16:29	80m	- / -4	RA7M	-1 / -	3	✓ Closing fragment
10-21 16:25	80m	-8 / -	RW3DBX	- / -5	2	Partial capture
10-21 16:24	80m	-11 / -	RO5A	- / -7	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
185600  +3  819  RA4CFX UA3ADE -02
185615  -9 1271  UA3ADE RA4CFX R-05
185630  +4  819  RA4CFX UA3ADE RR73
185645  -8 1271  UA3ADE RA4CFX 73
185700  +5  819  RA4CFX UA3ADE 73
185715  -9 1271  RM1O RA4CFX -05 (x2)
185845 -14 1271  CQ RA4CFX LO42 (x8)

80m

UTC    dB Audio  Message
183315  -9 1379  RA4CFX RX1AB KO59
183330  -7 1461  CQ RA4CFX LO42
183345  -5 1379  RA4CFX RX1AB KO59 (x2)
183415  +5 1461  RA4CFX DH0BRO JO62
183530  -8 1461  RX1AB RA4CFX -13
183600  -8 1461  CQ RA4CFX LO42 (x3)
183945  -6 2051  RA4CFX RW1AI 73
184130  -9 1461  CQ RA4CFX LO42
184145  -5 1274  RA4CFX I4VOL JN54 (x2)
184245  -2 1378  RA4CFX RX1AB KO59
184400  -7 1461  CQ RA4CFX LO42

40m

UTC    dB Audio  Message
230815 -24 1406  IU2THY RA4CFX -04
230830  +4 2751  RA4CFX IU2THY JN45
230845 -17 1406  IU2THY RA4CFX -01
230900  +3 2751  RA4CFX IU2THY JN45
230915 -10 1406  IU2THY RA4CFX -04
230930  -4 2751  RA4CFX IU2THY R+06
230945 -10 1406  IU2THY RA4CFX RR73
231000  -6 2752  RA4CFX IU2THY R+06
231015  -8 1406  IU2THY RA4CFX RR73
231045 -11 1406  CQ RA4CFX LO42 (x2)
231230  -2 1478  RA4CFX RZ6AKF KN95
231230 -12 3014  RA4CFX EA1KCN IN53 (x2)
075030 -20 2199  RA4CFX RD3FY R-10

20m

UTC    dB Audio  Message
075930 -16 1864  RA4CFX DK5HM JO41
075945 -24 1656  DL1R RA4CFX -11 (x2)
080100  -5 2670  RA4CFX DL1R JN58
080115 -17 1656  DL1R RA4CFX -13
080130 -19 1864  RA4CFX DK5HM JO41
080200  +1  543  RA4CFX I1RJP JN45
080200  -3 2670  RA4CFX DL1R JN58
080215 -22 1656  SP9DAT RA4CFX -20
080230  +2  543  RA4CFX I1RJP JN45
080230  +1 2670  RA4CFX DL1R JN58
080230 -20 1864  RA4CFX DK5HM JO41
080300  -2  543  RA4CFX I1RJP JN45
080300 -18 1864  RA4CFX DK5HM 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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