RA4FKZ — 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: LO23

Receiver-side FT8 activity involving RA4FKZ, decoded by SO8OO in southeastern Poland. 276 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 35 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-24.

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 276 FT8 messages attributed to RA4FKZ as the transmitting token by decoded message structure across 35 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (45%), followed by 20 m (42%) and 10 m (10%). Most decodes (59%) 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 -10.5 dB.

Overview

276
Messages attributed
35
UTC dates decoded
82
Active 15-min windows
-10.5 dB
Estimated median S/N

Bands

80m · 7 40m · 125 20m · 117 10m · 27
First attributed message: 2026-06-08
Last attributed message: 2026-09-24 16:35 UTC

Observed FT8 message patterns

Attributed sample
276 messages
Active dates
35 UTC dates
Estimated median S/N
-10.5 dB
Estimated 10th-90th percentile
-19 to +2 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 65, moderate (-15 to -9 dB) 98, strong (≥ -8 dB) 113.

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 RA4FKZ 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 RA4FKZ

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
LO23 · 157 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,639 km (approx.)
Last such locator decoded
2026-09-24 16:33 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 UTCBandRA4FKZ S/NCounterpartCounterpart S/NMsgsCapture
10-13 15:36 40m - / - RA9HO -16 / - 2 ✓ Closing fragment
10-13 15:33 40m - / +10 GJ0KYZ -12 / - 2 Partial capture
10-13 15:26 80m - / -10 RZ6ASO -14 / - 2 ✓ Closing fragment
10-13 15:22 80m - / -18 UN7LAN -19 / - 3 ✓ Closing fragment
10-13 14:12 40m - / +3 RU3VQ -16 / - 3 ✓ Closing fragment
10-12 17:01 80m - / -16 RW9WJ -20 / - 2 ✓ Closing fragment
10-12 16:58 80m - / -10 R4DS -6 / - 4 ✓ Closing fragment
10-12 16:55 80m - / -15 RN3OX +5 / - 3 ✓ Closing fragment
10-12 16:53 80m - / -17 R3ND -18 / - 3 ✓ Closing fragment
10-12 16:51 80m - / -11 R6ML -15 / - 5 ✓ Closing fragment
10-12 16:47 40m - / -12 R1BMZ 0 / - 2 ✓ Closing fragment
10-10 07:25 40m - / - DF8RU +1 / - 4 Partial capture
10-10 06:36 40m - / - DF8RU +2 / - 3 Partial capture
10-05 13:13 40m - / -5 OH3MB -8 / - 3 ✓ Closing fragment
10-05 13:07 40m - / - EW2GI -8 / - 4 ✓ Closing fragment
09-29 05:39 40m - / -18 R6JY -24 / - 2 ✓ Closing fragment
09-29 05:27 40m - / -16 F1PBZ -8 / - 2 Partial capture
09-29 05:26 40m - / +9 F4BYA +4 / - 3 ✓ Closing fragment
09-29 04:44 40m - / -12 UA3WG -15 / - 2 ✓ Closing fragment
09-28 17:03 40m - / -13 UB6OCD -1 / - 2 ✓ Closing fragment
09-28 15:39 40m - / -19 R6OV -16 / - 3 ✓ Closing fragment
09-24 16:34 80m -24 / -16 UB4FGK -9 / -8 4 ✓ Full exchange observed
09-24 16:33 80m - / -24 RA3TK -15 / - 3 ✓ Closing fragment
09-24 16:30 80m -24 / -7 RX3VF -10 / - 3 Partial capture
09-24 16:28 80m - / -20 R7DX 0 / - 3 ✓ Closing fragment
09-24 03:08 80m - / -18 R5AV -8 / - 2 ✓ Closing fragment
09-23 17:25 80m -24 / -16 R3ZG -19 / - 5 Partial capture
09-23 17:19 80m - / -14 DK7ZT -8 / - 5 Partial capture
09-23 17:16 80m - / -2 RJ3T -22 / - 3 ✓ Closing fragment
09-23 17:14 80m - / -21 R3LCW +6 / - 4 ✓ Closing fragment
09-23 17:12 80m - / -18 UA3GJM -1 / - 2 ✓ Closing fragment
09-23 17:08 80m - / - RZ6ALZ 0 / - 2 Partial capture
09-23 17:03 40m -17 / -1 R6DJR -2 / -7 5 ✓ Full exchange observed
09-23 17:00 40m -20 / -9 EU1EU -10 / - 4 Partial capture
09-23 15:30 40m -20 / -3 R2HD -4 / -5 3 Partial capture
09-23 15:30 40m - / - UI6O -12 / - 2 Partial capture
09-23 15:22 40m - / -13 R2DYC 0 / - 2 ✓ Closing fragment
09-22 18:28 40m - / - R6OIW -8 / - 2 ✓ Closing fragment
09-22 16:50 40m -16 / - YO4GOU -8 / -10 4 Partial capture
09-22 16:47 40m - / -13 OT7K +8 / - 2 ✓ Closing fragment
09-11 04:33 80m - / - OM8BCD -15 / - 2 ✓ Closing fragment
09-10 18:59 40m - / - DF8RU +10 / - 3 Partial capture
09-10 18:59 40m - / - R3LDK -4 / - 3 Partial capture
09-10 18:57 40m - / - OV5SP -6 / - 3 Partial capture
09-10 18:47 40m - / - F4BYA +1 / - 2 Partial capture
09-10 18:43 40m - / -20 DF0NN -6 / - 2 Partial capture
09-10 17:24 80m - / -23 R3UAF -3 / - 3 Partial capture
09-10 17:21 80m - / -15 R4UA +2 / - 3 Partial capture
09-10 17:12 80m - / -20 RY3D +20 / - 4 ✓ Closing fragment
09-10 17:12 80m - / -23 UA4FKT +5 / - 6 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
072615  -2 1537  RA4FKZ DF8RU JN68 (x2)
164615 -12 1897  RA4FKZ RA3WPF 73
164745  -1  626  RA4FKZ R1BMZ -12 (x2)
122400 -19 2314  RA4FKZ RK2Z KO81
124145 -22 1917  RA4FKZ R3RAA R+04
141230 -16 1188  RA4FKZ RU3VQ LO05 (x3)
141700 -20 1540  RA4FKZ R4YX 73
153330 -13 2123  RA4FKZ GJ0KYZ +10 (x2)
153645 -15 2208  RA4FKZ RA9HO NO09 (x2)
80m 
UTC    dB Audio  Message
165430 -19 1054  RA4FKZ R3ND 73
165500  +3 2806  RA4FKZ RN3OX LO00 (x3)
165800  -6 2230  RA4FKZ R4DS -10 (x4)
170130 -19 2122  RA4FKZ RW9WJ R-16 (x2)
152215 -19 1700  RA4FKZ UN7LAN MO13 (x3)
152645 -13 2127  RA4FKZ RZ6ASO R-10 (x2)
20m 
UTC    dB Audio  Message
143430 -14 1210  RA4FKZ F1IQH JN27
143500  -6 1618  RA4FKZ CT1BFP R-19 (x2)
043200  +2 1096  CQ RA4FKZ LO23 (x5)
043500  -9 1558  RA4FKZ SV9MBH KM25 (x2)
043545  +6  973  SV9MBH RA4FKZ RR73
043615  +5  973  CQ RA4FKZ LO23
043645  +5  973  UN2NC RA4FKZ R-21 (x2)
043745  -5  974  CQ RA4FKZ LO23
10m 
UTC    dB Audio  Message
065430  -5 1219  RA4FKZ RA6ANN KN95
065430  +1 2643  RA4FKZ F1PBZ -06
065600 -13 1219  RA4FKZ RA6ANN R+05 (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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