R4KR — 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: LO64

Receiver-side FT8 activity involving R4KR, decoded by SO8OO in southeastern Poland. 327 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 43 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-27.

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 327 FT8 messages attributed to R4KR as the transmitting token by decoded message structure across 43 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (52%), followed by 40 m (33%) and 20 m (15%). Most decodes (60%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

327

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

80m · 170 40m · 108 20m · 49

First attributed message: 2026-06-07
Last attributed message: 2026-09-27 18:40 UTC

Observed FT8 message patterns

Attributed sample: 327 messages
Active dates: 43 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -22 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 120, moderate (-15 to -9 dB) 130, strong (≥ -8 dB) 77.

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 R4KR in decoded directed-looking exchanges:

R5AV · European Russia ×3 R3RB · European Russia ×2 R4CHN · European Russia ×2 R4DD · European Russia ×2 R6ZB · European Russia ×2 RK6MC · European Russia ×2 YO9CX · Romania ×2 R3UG · European Russia ×2 R4FDD · European Russia ×2 DL1DXX · Fed. Rep. of Germany EK1KE · Armenia EW8AAC · Belarus

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 R4KR

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: LO64 · 152 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,166 km (approx.)
Last such locator decoded: 2026-09-27 18:40 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	R4KR S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-11 17:31	40m	- / -1	UA3PF	+2 / -	3	✓ Closing fragment
10-11 17:23	40m	- / -	RD3FY	-1 / -	3	Partial capture
10-09 01:28	40m	- / -9	IQ0AAX	-3 / -	5	Partial capture
10-05 16:33	80m	- / +2	R80SAA	+1 / -	2	✓ Closing fragment
10-02 19:10	40m	- / -	ON7GB	+10 / -	12	Partial capture
09-30 21:00	80m	- / -	UB3AMO	-11 / -	2	Partial capture
09-30 20:53	40m	- / -	OE9RWH	+1 / -	2	Partial capture
09-27 18:34	160m	- / -16	R5AV	-5 / -	2	✓ Closing fragment
09-27 18:27	80m	-17 / -	RC9WC	- / -	3	Partial capture
09-27 17:58	80m	- / -6	R4IK	0 / -	2	✓ Closing fragment
09-27 17:51	80m	- / -16	RK6MC	-6 / -	5	Partial capture
09-27 15:47	160m	- / -15	RA7T	-18 / -	2	Partial capture
09-27 15:38	80m	-16 / -5	R3UG	-10 / -16	8	✓ Full exchange observed
09-27 15:35	80m	- / +3	UG4L	-10 / -	2	✓ Closing fragment
09-27 15:17	40m	- / +7	RD3TBQ	-9 / -	2	✓ Closing fragment
09-27 15:15	40m	- / 0	RN3TT	-14 / -	2	Partial capture
09-27 01:39	80m	-9 / -15	RA4CX	+2 / -11	10	✓ Full exchange observed
09-27 01:36	80m	-5 / -	RX3ASQ	- / -	2	Partial capture
09-27 01:31	80m	-6 / -8	R8CW	-6 / -15	9	✓ Full exchange observed
09-27 01:29	80m	-11 / -2	RX6DA	+7 / -9	6	✓ Full exchange observed
09-27 01:25	80m	- / -14	GM6URC	-8 / -	2	Partial capture
09-27 01:24	80m	-5 / -5	R4FDD	-12 / -10	3	✓ Full exchange observed
09-27 01:22	80m	-5 / -	R3KLE	-8 / -4	5	✓ Full exchange observed
09-26 16:29	80m	-18 / -9	RV3X	+15 / -	4	✓ Closing observed
09-26 16:24	80m	- / -10	RX6LG	-5 / -	3	Partial capture
09-23 01:19	80m	-12 / -	R4OF	- / -5	2	Partial capture
09-23 01:17	80m	-10 / -2	RM8T	-1 / -6	5	✓ Full exchange observed
09-23 01:13	80m	-6 / +2	RA4CBN	+3 / -1	5	✓ Full exchange observed
09-23 01:05	40m	-20 / -	EW8AAC	- / -11	4	✓ Closing fragment
09-21 17:23	80m	-17 / -8	R3RB	+1 / -1	4	✓ Full exchange observed
09-21 17:18	80m	-16 / -21	RM3ZK	+5 / -	7	Partial capture
09-21 17:10	80m	-9 / +2	R2SN	+2 / -	3	✓ Closing observed
09-21 17:09	80m	-16 / -	RA3QQI	- / -	2	✓ Closing fragment
09-19 18:50	80m	- / -9	UA4AGU	-5 / -	4	✓ Closing fragment
09-19 18:47	80m	- / -15	R2DYN	-8 / -	2	Partial capture
09-19 03:15	40m	-21 / -	R1AI	- / -10	2	✓ Closing fragment
09-19 03:11	40m	-22 / -24	HZ1TT	-15 / -14	7	✓ Full exchange observed
09-17 18:50	80m	-9 / -6	UA2FF	+22 / -	3	Partial capture
09-17 02:13	40m	- / -17	RX7T	+2 / -	2	✓ Closing fragment
09-17 02:11	40m	- / -15	EK1KE	-10 / -	2	✓ Closing fragment
09-17 01:33	80m	-15 / -	R4OF	-8 / +8	5	✓ Full exchange observed
09-17 01:28	80m	-10 / -	R9WCK	-19 / -14	3	✓ Closing observed
09-14 16:36	40m	- / -	RA4ABH	-6 / -	2	Partial capture
09-14 16:34	40m	- / -1	R4CHN	-12 / -	2	✓ Closing fragment
09-14 16:32	80m	- / -	RK3YWA	-21 / -	7	Partial capture
09-14 16:21	40m	- / -1	RK4UZ	0 / -	2	✓ Closing fragment
09-14 16:11	40m	-11 / -16	RZ6AKF	+8 / -2	3	✓ Full exchange observed
09-14 16:07	40m	-16 / -	RX9ABI	-19 / -	3	✓ Closing observed
09-14 16:01	40m	- / -9	R4DD	-8 / -	2	✓ Closing fragment
09-13 19:41	80m	-16 / -	R9OOF	- / -	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
191500 +11  824  R4KR ON7GB JO21 (x2)
012830  -5  902  R4KR IQ0AAX -09 (x5)
172345  +3 2821  R4KR RD3FY KO85 (x3)
172515  -5 2110  R4KR RZ3DW KO84
173115  +2 1577  R4KR UA3PF KO84
173115  -6 2759  R4KR RW3ZC -15
173145  +2 1576  R4KR UA3PF R-01 (x2)

80m

UTC    dB Audio  Message
175315  -7 1263  R4KR RK6MC R-09 (x2)
175815  +0  558  R4KR R4IK -06 (x2)
182600 -12 2144  R4KR UG5F -03
182700 -18 1777  RC9WC R4KR LO64 (x4)
200800 -13 2253  R4KR RD9M/3 -08
201145  -3 1627  R4KR UA3IDQ -14
210000  -9 2118  R4KR UB3AMO KO85 (x2)
163345  +2 1304  R4KR R80SAA +02 (x2)

160m

UTC    dB Audio  Message
154715 -18 1097  R4KR RA7T -15 (x2)
183400  -4 1800  R4KR R5AV -16 (x2)

20m

UTC    dB Audio  Message
145630 -13 2247  CQ R4KR LO64
145830 -18 2247  A41ZZ R4KR R-11

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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