R4ADD — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving R4ADD, decoded by SO8OO in southeastern Poland. 522 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 57 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-09.
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 522 FT8 messages attributed to R4ADD as the transmitting token by decoded message structure across 57 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (68%), followed by 80 m (23%) and 40 m (8%). Most decodes (63%) fell within the six-hour window 14:00-20:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (61%); the estimated median was -7 dB.
Overview
Bands
Last attributed message: 2026-09-09 05:37 UTC
Observed FT8 message patterns
- Attributed sample
- 522 messages
- Active dates
- 57 UTC dates
- Estimated median S/N
- -7 dB
- Estimated 10th-90th percentile
- -15 to 0 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 39, moderate (-15 to -9 dB) 163, strong (≥ -8 dB) 320.
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 R4ADD 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 R4ADD
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
- LN28 · 109 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,686 km (approx.)
- Last such locator decoded
- 2026-08-23 18:58 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 | R4ADD S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-11 19:32 | 40m | - / -17 | IK4RVY | -2 / - | 2 | ✓ Closing fragment |
| 09-09 05:37 | 40m | - / -9 | UA3WG | -8 / - | 2 | ✓ Closing fragment |
| 09-09 05:36 | 40m | -15 / -10 | EU4U | -2 / - | 3 | ✓ Closing observed |
| 09-09 05:32 | 40m | - / -8 | EU7FBB | +15 / - | 3 | Partial capture |
| 09-01 03:28 | 40m | -6 / - | RC9WC | - / +1 | 2 | Partial capture |
| 09-01 03:26 | 40m | -6 / - | PV8AJ | - / -20 | 3 | Partial capture |
| 09-01 03:25 | 40m | -8 / - | R3IX | - / -16 | 2 | ✓ Closing fragment |
| 08-29 17:58 | 80m | -9 / - | RT4A | -3 / - | 2 | ✓ Closing observed |
| 08-29 17:56 | 80m | -10 / +10 | R4AFR | -5 / 0 | 4 | ✓ Full exchange observed |
| 08-29 17:52 | 80m | -4 / - | R2EA/P | - / -7 | 4 | Partial capture |
| 08-25 06:26 | 20m | +1 / - | R2GBR | - / -1 | 2 | ✓ Closing fragment |
| 08-23 18:57 | 80m | -16 / - | RA0SCA | - / -10 | 3 | Partial capture |
| 08-23 03:59 | 40m | -21 / - | R3DOE/P | - / -11 | 2 | ✓ Closing fragment |
| 08-19 13:59 | 20m | -9 / - | F4BNZ | - / -17 | 3 | Partial capture |
| 08-16 18:01 | 20m | -4 / - | JH4VTV | - / - | 3 | Partial capture |
| 08-16 17:07 | 20m | -2 / -12 | GW4AYJ | -2 / -9 | 7 | ✓ Full exchange observed |
| 08-16 14:45 | 20m | -4 / - | <...> | - / -9 | 4 | Partial capture |
| 08-15 17:39 | 20m | -6 / - | 5B4ARQ | - / -16 | 3 | ✓ Closing fragment |
| 08-15 17:38 | 20m | -5 / - | RW3C/P | - / -5 | 2 | Partial capture |
| 08-13 19:08 | 80m | - / -2 | EW8AAC | -2 / - | 2 | ✓ Closing fragment |
| 08-12 19:28 | 80m | - / - | R2FEA | +19 / - | 2 | Partial capture |
| 08-12 19:27 | 80m | -12 / -18 | YO4LUP | -1 / -15 | 5 | ✓ Full exchange observed |
| 08-11 19:51 | 20m | -14 / -7 | F4AFO | -10 / -6 | 5 | ✓ Full exchange observed |
| 08-11 19:48 | 20m | -13 / - | F4AFO | - / -10 | 2 | Partial capture |
| 08-09 19:23 | 40m | - / +3 | R9CS/P | -4 / - | 2 | ✓ Closing fragment |
| 08-09 19:10 | 20m | - / -2 | F4BPO | -10 / - | 2 | ✓ Closing fragment |
| 08-09 14:13 | 20m | -18 / - | GS4AGG | - / -17 | 2 | ✓ Closing fragment |
| 08-08 05:23 | 20m | -13 / -3 | UA3VVA | -14 / 0 | 3 | ✓ Full exchange observed |
| 08-08 01:51 | 40m | - / - | PD0LBY | -20 / - | 6 | Partial capture |
| 08-07 17:40 | 80m | 0 / - | RV9FF | -14 / -5 | 4 | ✓ Closing observed |
| 08-07 17:17 | 20m | -1 / -10 | GW4BKG | -14 / -6 | 4 | ✓ Full exchange observed |
| 08-07 04:16 | 20m | -4 / - | ZL2BX | - / -12 | 2 | Partial capture |
| 08-07 04:12 | 20m | -6 / - | RA4AG | - / -22 | 4 | Partial capture |
| 08-06 18:30 | 20m | -8 / - | RW3DDZ | - / -9 | 2 | ✓ Closing fragment |
| 08-06 18:29 | 20m | -3 / - | R4PHH | - / -6 | 2 | ✓ Closing fragment |
| 08-06 18:25 | 20m | -7 / - | RW3DDZ | - / -8 | 3 | ✓ Closing fragment |
| 08-06 18:23 | 20m | +2 / - | 5B4AJG | - / -13 | 2 | Partial capture |
| 08-06 18:14 | 20m | -3 / - | R9WH/P | - / - | 2 | Partial capture |
| 08-06 18:09 | 20m | -3 / - | R9WH/P | - / -5 | 2 | Partial capture |
| 08-06 17:58 | 20m | +2 / - | OE4AHG | - / - | 2 | Partial capture |
| 08-06 17:54 | 20m | 0 / -18 | GX4BRA | -14 / -11 | 5 | ✓ Full exchange observed |
| 08-06 14:48 | 20m | 0 / -8 | UB4AFW | -6 / -9 | 4 | ✓ Full exchange observed |
| 08-06 13:26 | 20m | -16 / - | BI4AEL | - / -14 | 4 | Partial capture |
| 08-05 19:31 | 80m | -12 / - | RT4A | 0 / -15 | 4 | ✓ Closing observed |
| 08-05 19:15 | 20m | -7 / - | BH4ECL | - / -7 | 3 | ✓ Closing fragment |
| 08-05 19:14 | 20m | -5 / - | F1PPH | -6 / -15 | 2 | Partial capture |
| 08-05 07:00 | 20m | -12 / - | IZ4AFM | -5 / -11 | 3 | ✓ Closing observed |
| 08-02 19:58 | 80m | -3 / - | RX6AOB | - / -1 | 2 | Partial capture |
| 08-02 19:52 | 80m | -3 / - | 5Z4AB | - / 0 | 8 | ✓ Closing fragment |
| 08-02 19:46 | 80m | +1 / - | 5Z4AB | - / -16 | 7 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 032715 -5 974 PV8AJ R4ADD -22 (x2) 032845 -6 973 RC9WC R4ADD +01 (x2) 052915 -18 852 RD5Q R4ADD R-01 053200 +13 3022 R4ADD EU7FBB -08 (x3) 053645 -2 1242 R4ADD EU4U R-10 053700 -15 851 EU4U R4ADD RR73 053715 -2 1242 R4ADD EU4U 73 053745 -8 852 R4ADD UA3WG R-09 (x2) 193245 -2 2006 R4ADD IK4RVY R-17 (x2)
UTC dB Audio Message 190800 +0 1222 R4ADD EW8AAC -02 (x2) 185745 -24 882 RA0SCA R4ADD -10 (x3) 175230 -5 934 R2EA/P R4ADD -07 (x4) 175615 -11 934 R4AFR R4ADD +00 175630 -3 1039 R4ADD R4AFR R+10 175645 -9 934 R4AFR R4ADD RR73 175700 -7 1040 R4ADD R4AFR 73 175815 -9 934 RT4A R4ADD RR73 175830 -3 1870 R4ADD RT4A 73
UTC dB Audio Message 170900 +0 541 R4ADD GW4AYJ R-12 170915 -3 919 GW4AYJ R4ADD RR73 170930 -5 541 R4ADD GW4AYJ 73 180115 -8 689 JH4VTV R4ADD LN28 (x3) 135915 -8 1006 F4BNZ R4ADD -17 (x3) 082700 -3 1187 RU0AX R4ADD RR73 062545 +1 912 RA9CUU R4ADD RR73 062645 +0 912 R2GBR R4ADD R-01 (x2) 064645 -10 822 <...> R4ADD -09 (x2)
UTC dB Audio Message 082615 -18 1363 R4ADD R4CR -13 (x3) 075315 -16 940 R2DYC R4ADD R-12
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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee