R4CAQ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO31

Receiver-side FT8 activity involving R4CAQ, decoded by SO8OO in southeastern Poland. 183 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-08-05.

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 183 FT8 messages attributed to R4CAQ as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (66%), followed by 20 m (33%) and 80 m (1%). Most decodes (75%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

183

Messages attributed

UTC dates decoded

Active 15-min windows

-16 dB

Estimated median S/N

Bands

80m · 2 40m · 121 20m · 60

First attributed message: 2026-06-13
Last attributed message: 2026-08-05 18:11 UTC

Observed FT8 message patterns

Attributed sample: 183 messages
Active dates: 10 UTC dates
Estimated median S/N: -16 dB
Estimated 10th-90th percentile: -20 to -9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 105, moderate (-15 to -9 dB) 61, strong (≥ -8 dB) 17.

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 R4CAQ in decoded directed-looking exchanges:

IZ4FHV/R · Italy UB2FEH · Kaliningrad 9A5AND · Croatia CR7BUJ · Portugal DL7ACA · Fed. Rep. of Germany EA3FCQ · Spain EW8DG · Belarus HG8IT · Hungary HZ1TT · Saudi Arabia R3GO · European Russia R3QV · European Russia R4SCB · 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 R4CAQ

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: LO31 · 96 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,774 km (approx.)
Last such locator decoded: 2026-08-05 18:11 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	R4CAQ S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-05 18:06	40m	-17 / -	R6YG	-16 / -13	3	✓ Closing observed
08-05 18:04	40m	-17 / -8	RV3GZ	-8 / -3	2	Partial capture
08-05 18:02	40m	-18 / -	UB4HVA	- / -9	2	✓ Closing fragment
08-05 17:59	40m	-15 / -12	RC6OZ	-15 / -7	2	Partial capture
08-04 16:37	40m	-18 / -9	R2FDU	-11 / -15	4	Partial capture
08-04 16:30	40m	-21 / +5	RA3RUG	-18 / -	2	✓ Closing observed
08-04 16:26	40m	- / -	YT2TW	-18 / -	2	Partial capture
08-04 16:22	40m	- / -17	EW8DG	-12 / -	2	✓ Closing fragment
08-04 16:16	40m	- / -4	R6FMK	-14 / -	3	✓ Closing fragment
08-03 18:10	40m	-18 / -11	RU5X	0 / -1	4	✓ Full exchange observed
08-03 15:11	40m	- / +7	RK6MC	-16 / -	3	✓ Closing fragment
07-19 09:41	20m	- / -10	IZ4FHV/R	-17 / -	3	✓ Closing fragment
07-19 09:31	20m	- / -	F4BJN	-13 / -	3	Partial capture
06-24 19:47	40m	-20 / -6	UB3AYQ	-20 / -6	4	✓ Full exchange observed
06-24 19:44	40m	-19 / -	R3ECI	- / -11	3	Partial capture
06-24 19:29	40m	-20 / -	R7OP	-8 / -7	4	Partial capture
06-24 19:28	40m	-20 / -14	EA3FCQ	-3 / -4	4	✓ Full exchange observed
06-24 19:20	40m	-19 / -	HG8IT	-20 / -	2	✓ Closing observed
06-24 19:18	40m	-18 / -8	DL7ACA	-12 / -8	4	✓ Full exchange observed
06-24 19:12	40m	-18 / -	R1NIM	- / -	2	Partial capture
06-24 19:06	40m	- / +5	R2APC	-16 / -	6	Partial capture
06-24 19:06	40m	- / -	R2FBW	-22 / -	9	Partial capture
06-24 19:05	40m	-18 / -	9A5AND	-11 / -8	3	✓ Closing observed
06-24 19:03	40m	-19 / -17	HZ1TT	-18 / -14	4	✓ Full exchange observed
06-24 19:00	40m	-19 / -	CR7BUJ	- / -20	3	✓ Closing fragment
06-24 18:57	40m	-19 / -	R1NIM	- / -26	2	Partial capture
06-24 18:52	40m	-16 / -	<...>	- / -12	2	Partial capture
06-24 18:03	40m	-15 / -	R3GO	- / +1	2	✓ Closing fragment
06-24 17:54	40m	-19 / -	A99AA	- / -	3	Partial capture
06-24 17:48	40m	-18 / -1	RA3DFQ	-14 / +4	4	✓ Full exchange observed
06-24 17:01	40m	-19 / -5	R3QV	-16 / -	3	✓ Closing observed
06-23 15:23	40m	- / 0	UA3ZUX	-8 / -	2	✓ Closing fragment
06-23 13:46	20m	-16 / -	UB2FEH	- / -11	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
180300 -18 2113  UB4HVA R4CAQ RR73
180330 -19 2114  CQ R4CAQ LO31                         a1
180400 -17 2114  RV3GZ R4CAQ -03
180415  -8  382  R4CAQ RV3GZ R-08
180530 -16 2114  CQ R4CAQ LO31 (x2)
180615 -14 2114  R4CAQ R6YG LN04
180730 -17 2114  R6YG R4CAQ -13
180815 -19 2114  R4CAQ R6YG 73
180830 -18 2114  CQ R4CAQ LO31 (x4)
181145 -21 1678  R4CAQ SA6DST JO67
181145 -19 2114  ON6PL R4CAQ LO31

20m

UTC    dB Audio  Message
134800 -13 1075  CQ R4CAQ LO31 (x9)
093100 -14 1110  R4CAQ F4BJN JN25 (x3)
094115 -17 1512  R4CAQ IZ4FHV/R -10 (x3)

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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