R4KB — 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: LO53

Receiver-side FT8 activity involving R4KB, decoded by SO8OO in southeastern Poland. 230 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, across 13 UTC dates in the available aggregate history. Observed between 2026-09-03 and 2026-11-05.

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 230 FT8 messages attributed to R4KB as the transmitting token by decoded message structure across 13 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (48%), followed by 160 m (35%) and 80 m (17%). Most decodes (70%) fell within the six-hour window 23:00-05:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

230
Messages attributed
13
UTC dates decoded
43
Active 15-min windows
-11 dB
Estimated median S/N

Bands

160m · 80 80m · 40 40m · 110
First attributed message: 2026-09-03
Last attributed message: 2026-11-05 04:56 UTC

Observed FT8 message patterns

Attributed sample
230 messages
Active dates
13 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-20 to -4 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 60, moderate (-15 to -9 dB) 95, strong (≥ -8 dB) 75.

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 R4KB in decoded directed-looking exchanges:

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 R4KB

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
LO53 · 173 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
2,036 km (approx.)
Last such locator decoded
2026-11-05 04:56 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 UTCBandR4KB S/NCounterpartCounterpart S/NMsgsCapture
11-05 04:54 40m -20 / - KD0BTO - / - 3 Partial capture
11-05 04:40 40m - / - RD3FY -4 / - 5 Partial capture
11-05 04:38 40m -20 / - OA4ENG - / -6 4 Partial capture
11-05 04:37 40m - / - F1IQH -12 / - 2 Partial capture
11-05 04:36 40m - / - PD1DBL -2 / - 5 Partial capture
11-05 04:36 40m - / - R2FBW -16 / - 4 Partial capture
10-29 14:28 40m -16 / +1 EX7CQ -16 / +1 4 ✓ Full exchange observed
10-29 14:26 40m -15 / - BG0CFD - / -18 4 ✓ Closing fragment
10-29 14:25 40m -15 / -10 TC1TR -11 / - 3 Partial capture
10-29 14:21 40m - / +1 UA7T -10 / - 4 Partial capture
10-29 14:20 40m -16 / -2 R2HE -22 / -13 4 ✓ Full exchange observed
10-29 14:17 40m - / -7 RY7G -3 / - 3 ✓ Closing fragment
10-21 14:50 40m -7 / - RA0SCZ -14 / -16 2 Partial capture
10-21 14:49 40m -7 / - RA9UES - / -2 2 ✓ Closing fragment
10-21 14:42 40m -6 / - RV9UNK - / -14 9 Partial capture
10-21 14:35 40m -12 / -16 UB6HQQ -16 / - 3 ✓ Closing observed
10-21 14:34 40m - / - PD4RJ -14 / - 2 Partial capture
10-21 14:18 40m -10 / - RA5CW -10 / -11 3 ✓ Closing observed
10-21 14:17 40m -14 / - UA9CIC - / -2 2 ✓ Closing fragment
10-21 14:15 40m -11 / - UK8FCM - / -8 2 ✓ Closing fragment
10-21 14:14 40m -10 / - RY2B - / -14 2 ✓ Closing fragment
10-21 14:08 40m -13 / -4 RM7M -12 / -10 5 Partial capture
10-21 14:06 40m -10 / - R9OON - / -10 2 ✓ Closing fragment
10-21 14:06 40m -13 / -4 HA7TM +9 / -17 6 ✓ Full exchange observed
09-24 02:06 160m -24 / - N8TR - / - 2 Partial capture
09-24 01:32 80m - / - DL9ATW -1 / - 7 Partial capture
09-24 01:24 80m -19 / - YV6BXN - / - 3 Partial capture
09-24 00:29 160m -12 / -5 RM5F 0 / - 4 ✓ Closing observed
09-24 00:28 160m - / - LA9JKA -8 / - 3 Partial capture
09-24 00:25 160m -12 / -12 F4VWK +4 / -17 12 ✓ Full exchange observed
09-23 03:02 40m -10 / - KI4R - / - 2 Partial capture
09-23 02:58 40m -7 / - W0MU - / - 7 Partial capture
09-23 02:54 40m -8 / - WC7F - / - 2 Partial capture
09-23 02:46 40m - / - CT2HEX -8 / - 3 Partial capture
09-23 02:34 80m -18 / - CE3TSK - / - 4 Partial capture
09-23 02:29 160m -21 / - LY3BRA - / - 2 Partial capture
09-23 02:27 160m -24 / - EA8BS - / - 2 Partial capture
09-23 02:16 160m -17 / - EA8BS - / - 2 Partial capture
09-23 02:08 160m - / - RZ6BS +6 / - 2 Partial capture
09-23 02:07 160m -14 / - EA8BS - / - 12 Partial capture
09-23 01:58 160m -11 / - EA8BS - / - 4 Partial capture
09-23 01:54 160m -16 / - EA8BS - / - 3 Partial capture
09-23 01:49 160m -6 / - EA8BS - / - 5 Partial capture
09-22 20:24 160m -18 / - F5BZB - / - 2 Partial capture
09-22 20:11 160m - / - RZ6BS -9 / - 3 Partial capture
09-22 20:09 160m - / -15 E73DPR -6 / - 2 ✓ Closing fragment
09-22 04:54 40m - / -7 RW4HD -2 / - 3 ✓ Closing fragment
09-22 04:51 40m - / -20 4O7CC -6 / - 4 ✓ Closing fragment
09-22 04:44 40m - / -22 4O7CC -9 / - 3 Partial capture
09-21 23:13 160m - / 0 UA6JQ -14 / - 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
043800 -13 1929  R4KB F1IQH JN27
043815 -22 1929  OA4ENG R4KB LO53
043830  +3 1583  R4KB PD1DBL JO22
043845 -20 1929  OA4ENG R4KB LO53 (x3)
044030  +5 2337  R4KB RD3FY KO85 (x5)
045430 -20 1929  KD0BTO R4KB LO53 (x3)
051630 -14 1535  R4KB UA3RBM -03
80m 
UTC    dB Audio  Message
023730 -11 2660  CE3TSK R4KB LO53
004330 -11 2499  N4OME R4KB LO53 (x2)
012415 -16 1607  YV6BXN R4KB LO53 (x3)
013200  -4  302  R4KB DL9ATW JO61 (x7)
021515 -13 2508  YV6BXN R4KB LO53 (x2)
160m 
UTC    dB Audio  Message
002715  -9 2397  F4VWK R4KB R-17
002730  +8 2397  R4KB F4VWK RR73
002745  -7 2397  F4VWK R4KB R-17
002800  +7 2397  R4KB F4VWK RR73
002815 -10 2397  F4VWK R4KB R-17
002830 -14 1653  R4KB LA9JKA JP32
002830  +5 2397  R4KB F4VWK RR73
002900  -1  470  R4KB RM5F KO85
002900  -4 1653  R4KB LA9JKA JP32
002930  +1  470  R4KB RM5F R-05
002930  -6 1653  R4KB LA9JKA JP32
002945 -12 2397  RM5F R4KB RR73
003000  -1  470  R4KB RM5F 73
020600 -24 1545  N8TR R4KB LO53 (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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