RK3ZB — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving RK3ZB, decoded by SO8OO in southeastern Poland. 1,842 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 74 UTC dates in the available aggregate history. Observed between 2026-06-07 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 1,842 FT8 messages attributed to RK3ZB as the transmitting token by decoded message structure across 74 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (36%), followed by 80 m (36%) and 40 m (13%). Most decodes (69%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (71%); the estimated median was -3 dB.
Overview
Bands
Last attributed message: 2026-11-05 19:12 UTC
Observed FT8 message patterns
- Attributed sample
- 1,842 messages
- Active dates
- 74 UTC dates
- Estimated median S/N
- -3 dB
- Estimated 10th-90th percentile
- -15 to +8 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 173, moderate (-15 to -9 dB) 354, strong (≥ -8 dB) 1,315.
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 RK3ZB 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 RK3ZB
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
- KO70 · 750 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 941 km (approx.)
- Last such locator decoded
- 2026-11-05 19:12 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 | RK3ZB S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-05 19:12 | 160m | -13 / -17 | R3IDH | -16 / - | 4 | Partial capture |
| 11-05 17:42 | 160m | -2 / -13 | RW6MZ | -12 / +3 | 5 | ✓ Full exchange observed |
| 11-05 17:40 | 160m | -13 / - | UA4QK | - / -15 | 3 | ✓ Closing fragment |
| 11-05 17:39 | 160m | -2 / - | RW6MMU | - / -6 | 2 | ✓ Closing fragment |
| 11-05 17:38 | 160m | -4 / -9 | S56P | +19 / -5 | 4 | ✓ Full exchange observed |
| 11-05 17:36 | 160m | -3 / - | UA6XY | - / -7 | 4 | ✓ Closing fragment |
| 11-03 22:20 | 80m | -1 / - | TA1MB | - / -23 | 3 | ✓ Closing fragment |
| 11-02 17:54 | 80m | -2 / - | R1QD | - / -22 | 2 | ✓ Closing fragment |
| 11-02 17:50 | 80m | -8 / - | F5OYA/P | - / -16 | 2 | Partial capture |
| 11-02 16:36 | 160m | -23 / - | R6PAG | - / -6 | 2 | ✓ Closing fragment |
| 11-02 16:20 | 160m | -19 / - | RC3RD | - / -1 | 8 | ✓ Closing fragment |
| 11-02 03:56 | 80m | +1 / - | SX37VER | - / -12 | 2 | Partial capture |
| 11-02 03:51 | 80m | -7 / - | RU4CK/P | - / - | 3 | Partial capture |
| 11-01 18:47 | 80m | 0 / - | RU4CK/P | - / -12 | 2 | ✓ Closing fragment |
| 11-01 03:28 | 80m | -7 / -3 | UA3YPS | +4 / -8 | 4 | ✓ Full exchange observed |
| 10-31 23:06 | 80m | +6 / -11 | AP2AM | -15 / -11 | 5 | ✓ Full exchange observed |
| 10-31 22:51 | 80m | -5 / - | SM1OII | - / - | 9 | Partial capture |
| 10-31 22:39 | 80m | +2 / - | SM1OII | - / - | 17 | Partial capture |
| 10-31 18:28 | 80m | -9 / - | RV3X | - / -2 | 3 | ✓ Closing fragment |
| 10-31 18:23 | 80m | 0 / -6 | UA3NFI | -8 / -1 | 5 | ✓ Full exchange observed |
| 10-31 18:14 | 80m | +1 / - | SQ100LKK | - / -4 | 3 | Partial capture |
| 10-30 16:44 | 80m | -5 / - | YU65AEC | - / -16 | 2 | Partial capture |
| 10-30 03:58 | 160m | -10 / - | RA6MQ/P | - / - | 2 | Partial capture |
| 10-30 03:49 | 160m | -2 / - | RA6MQ/P | - / - | 4 | Partial capture |
| 10-29 07:00 | 40m | -4 / - | TK/DH7SB | - / -11 | 3 | Partial capture |
| 10-29 05:30 | 40m | +1 / - | 6W/IK2HKT | - / - | 3 | Partial capture |
| 10-29 05:23 | 40m | +4 / - | YU65AEC | - / - | 4 | Partial capture |
| 10-29 03:42 | 80m | +16 / - | <...> | - / -19 | 2 | Partial capture |
| 10-28 04:13 | 80m | +8 / - | R9CS/P | - / -15 | 2 | Partial capture |
| 10-27 22:26 | 160m | -4 / - | VR2ZXP | - / - | 6 | Partial capture |
| 10-27 22:13 | 160m | - / - | IU3RRX | -4 / - | 2 | Partial capture |
| 10-27 21:24 | 160m | +3 / - | XX9TXN | - / -21 | 86 | ✓ Closing fragment |
| 10-27 20:55 | 160m | +3 / - | 5Z4VJ | - / - | 7 | Partial capture |
| 10-27 18:36 | 160m | -17 / - | R9CS/P | - / -13 | 18 | Partial capture |
| 10-27 18:31 | 160m | -20 / - | R9CS/P | - / - | 3 | Partial capture |
| 10-27 16:47 | 80m | -5 / - | XX9TXN | - / -21 | 66 | ✓ Closing fragment |
| 10-27 15:05 | 80m | -10 / - | XX9TXN | - / - | 8 | Partial capture |
| 10-27 14:56 | 80m | -7 / - | XX9TXN | - / - | 9 | Partial capture |
| 10-27 06:27 | 10m | - / -5 | 7Z1FF | -15 / - | 2 | ✓ Closing fragment |
| 10-26 18:21 | 160m | 0 / - | XX9TXN | - / - | 3 | Partial capture |
| 10-26 18:10 | 160m | 0 / - | XX9TXN | - / - | 4 | Partial capture |
| 10-26 18:04 | 160m | +3 / - | XX9TXN | - / - | 8 | Partial capture |
| 10-26 17:55 | 160m | -2 / - | XX9TXN | - / - | 4 | Partial capture |
| 10-26 17:16 | 160m | -12 / - | XX9TXN | - / - | 52 | Partial capture |
| 10-26 17:09 | 160m | -15 / - | XX9TXN | - / - | 3 | Partial capture |
| 10-22 20:11 | 160m | +4 / 0 | R4FDK | +2 / 0 | 5 | ✓ Full exchange observed |
| 10-22 20:09 | 160m | +8 / -11 | 4J3DJ | 0 / -4 | 4 | ✓ Full exchange observed |
| 10-22 20:08 | 160m | -2 / -7 | DF5AH | -9 / -14 | 5 | ✓ Full exchange observed |
| 10-22 20:05 | 160m | -4 / - | 4J3DJ | - / -1 | 4 | Partial capture |
| 10-22 19:54 | 160m | -10 / -7 | OM2WW | +10 / -7 | 5 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 173845 +19 2316 RK3ZB S56P 73 173900 -2 1340 RW6MMU RK3ZB -06 (x2) 174015 -24 1340 UA4QK RK3ZB -15 (x3) 174230 -11 1996 RK3ZB RW6MZ KN97 174315 -3 1340 RW6MZ RK3ZB +03 174330 -12 1996 RK3ZB RW6MZ R-13 174345 -2 1340 RW6MZ RK3ZB RR73 174400 -13 1996 RK3ZB RW6MZ 73 191215 -12 1340 R3IDH RK3ZB KO70 (x2) 191300 -16 901 RK3ZB R3IDH -17 (x2)
UTC dB Audio Message 035145 -3 1633 RU4CK/P RK3ZB KO70 (x3) 035645 +0 1328 SX37VER RK3ZB KO70 (x2) 175030 -9 781 F5OYA/P RK3ZB -16 175100 -5 781 <R330CF> RK3ZB -08 175130 -6 781 F5OYA/P RK3ZB -04 175145 -18 203 RK3ZB TK/DH7SB R+05 175300 -4 781 EW4DX RK3ZB -13 175445 -1 782 R1QD RK3ZB -22 (x2) 222045 -4 1045 TA1MB RK3ZB -23 (x3)
UTC dB Audio Message 181330 -2 1219 UA9QFF RK3ZB -09 (x2) 181445 -12 1215 RK3ZB R6DJR RR73 181500 -2 1219 R6DJR RK3ZB 73 181530 -2 1218 BA5AW RK3ZB -18 052315 +2 1166 YU65AEC RK3ZB KO70 (x4) 053015 +0 1448 <6W/IK2HKT> RK3ZB KO70 (x3) 070015 -4 1032 TK/DH7SB RK3ZB -11 (x3)
UTC dB Audio Message 094745 -12 1234 RA4P RK3ZB KO70 (x3) 094945 -18 1803 <...> RK3ZB KO70 (x8) 100715 -3 989 HB10GBT RK3ZB KO70 100745 -12 1403 <...> RK3ZB -08 062715 -15 1086 RK3ZB 7Z1FF R-05 (x2)
UTC dB Audio Message 063945 +6 2823 RL2F RK3ZB RR73 (x3) 064230 +8 2666 R7RCH RK3ZB -14 (x2) 064345 +4 2736 RK3ZB R7RCH R-06 064400 +13 2665 R7RCH RK3ZB RR73 064415 +4 2736 RK3ZB R7RCH 73 065045 +13 2821 <...> RK3ZB -03 065145 +18 2821 <R3RRC/1> RK3ZB -06 (x2) 065345 +18 2820 R1BL RK3ZB -02 (x2) 065430 -9 2222 RK3ZB R1BL 73 065630 +13 2820 R3RRC/1 RK3ZB -13
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.
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