IU4DTV — 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 IU4DTV, decoded by SO8OO in southeastern Poland. 3,035 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 81 UTC dates in the available aggregate history. Observed between 2026-06-06 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 3,035 FT8 messages attributed to IU4DTV as the transmitting token by decoded message structure across 81 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (71%), followed by 20 m (12%) and 60 m (9%). Most decodes (71%) 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 -8 dB.
Overview
Bands
Last attributed message: 2026-11-05 20:08 UTC
Observed FT8 message patterns
- Attributed sample
- 3,035 messages
- Active dates
- 81 UTC dates
- Estimated median S/N
- -8 dB
- Estimated 10th-90th percentile
- -19 to +2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 662, moderate (-15 to -9 dB) 829, strong (≥ -8 dB) 1,544.
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 IU4DTV 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 IU4DTV
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
- JN54 · 361 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,013 km (approx.)
- Last such locator decoded
- 2026-11-05 19:53 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 | IU4DTV S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-05 20:07 | 40m | -12 / -16 | IU4PRI | -12 / -10 | 3 | ✓ Full exchange observed |
| 11-05 19:59 | 40m | -6 / +7 | IK1QLI | -7 / -2 | 4 | ✓ Full exchange observed |
| 11-05 19:55 | 40m | -9 / - | R4FDK | - / -7 | 2 | ✓ Closing fragment |
| 11-05 19:48 | 40m | -10 / - | HB9EKJ | - / -7 | 2 | ✓ Closing fragment |
| 11-05 19:44 | 40m | -3 / - | OE7LVI | - / -10 | 2 | ✓ Closing fragment |
| 11-05 19:33 | 40m | -6 / 0 | R9GM | -17 / +3 | 4 | ✓ Full exchange observed |
| 11-05 19:31 | 40m | +6 / - | YL2TM | -8 / -10 | 5 | ✓ Full exchange observed |
| 11-05 19:31 | 40m | -9 / - | OM3TBG | - / -6 | 2 | Partial capture |
| 11-05 19:30 | 40m | -6 / - | EA5GQB | - / -5 | 2 | ✓ Closing fragment |
| 11-05 12:34 | 40m | -11 / - | IZ4AIF | -10 / +4 | 5 | ✓ Full exchange observed |
| 11-05 12:29 | 40m | -8 / -3 | S54Z | -11 / -2 | 3 | ✓ Full exchange observed |
| 11-05 12:25 | 40m | -12 / - | SA7BXU | - / -16 | 3 | ✓ Closing fragment |
| 11-05 12:18 | 40m | -14 / - | IV3KQE | - / -12 | 2 | Partial capture |
| 11-05 12:14 | 40m | - / - | YL3ATJ | -9 / - | 3 | Partial capture |
| 11-05 12:11 | 40m | -14 / -4 | OH3MB | -8 / -11 | 5 | ✓ Full exchange observed |
| 11-05 12:06 | 40m | -5 / - | PC6A | -3 / - | 2 | ✓ Closing observed |
| 11-05 12:03 | 40m | -6 / - | IU5VLR | -13 / -10 | 3 | ✓ Closing observed |
| 11-05 05:20 | 40m | - / -6 | SV2BRT | -16 / - | 2 | ✓ Closing fragment |
| 11-04 21:45 | 40m | -4 / - | BI3UPU | - / -9 | 2 | ✓ Closing fragment |
| 11-04 21:44 | 40m | -11 / - | DJ4CH | - / -8 | 2 | ✓ Closing fragment |
| 11-04 21:42 | 40m | -2 / - | IW8RPQ | - / -1 | 4 | ✓ Closing fragment |
| 11-04 21:36 | 40m | -4 / - | UA9XL/P | - / -9 | 3 | Partial capture |
| 11-04 21:35 | 40m | -4 / - | SP9NVY | - / -1 | 2 | ✓ Closing fragment |
| 11-04 21:27 | 40m | -6 / - | JH2BJL | - / -12 | 2 | Partial capture |
| 11-04 21:17 | 40m | -2 / - | SQ9GOL | - / -6 | 2 | ✓ Closing fragment |
| 11-04 21:15 | 40m | -4 / - | SP4AZN | - / -7 | 2 | ✓ Closing fragment |
| 11-04 21:14 | 40m | -6 / - | DG2RBH | - / 0 | 2 | ✓ Closing fragment |
| 11-04 21:07 | 40m | -8 / - | US1GFT | - / -5 | 2 | ✓ Closing fragment |
| 11-04 21:03 | 40m | -12 / +1 | CT1DIZ | -16 / -10 | 4 | ✓ Full exchange observed |
| 11-04 20:59 | 40m | -9 / - | AP5ARS | - / -12 | 3 | Partial capture |
| 11-04 20:53 | 40m | -12 / - | SQ3HLB | - / -1 | 2 | ✓ Closing fragment |
| 11-04 20:50 | 40m | -10 / - | EB1EXS | - / - | 2 | ✓ Closing fragment |
| 11-04 20:49 | 40m | -10 / - | HL2CFY | - / -18 | 2 | ✓ Closing fragment |
| 11-04 20:40 | 40m | -9 / - | OM8AKP | - / -15 | 2 | ✓ Closing fragment |
| 11-04 20:37 | 40m | -7 / - | DL5OAH | - / +1 | 2 | ✓ Closing fragment |
| 11-04 20:28 | 40m | 0 / - | EA7CRB | - / 0 | 2 | Partial capture |
| 11-04 20:27 | 40m | -6 / - | OE3RWR | - / +8 | 2 | ✓ Closing fragment |
| 11-04 20:25 | 40m | -2 / - | DB6FA | - / -9 | 2 | ✓ Closing fragment |
| 11-04 20:24 | 40m | -2 / 0 | ZL1RPC/F | +2 / -7 | 2 | Partial capture |
| 11-04 05:08 | 40m | - / -8 | 5B4AMX | -8 / - | 2 | ✓ Closing fragment |
| 11-03 21:18 | 40m | -10 / -5 | TC8TR | -12 / -3 | 5 | ✓ Full exchange observed |
| 11-03 21:14 | 40m | - / - | UA9SY | -13 / - | 3 | Partial capture |
| 11-02 21:47 | 40m | - / -1 | GI3PXT | -24 / - | 2 | ✓ Closing fragment |
| 11-02 13:01 | 40m | -10 / - | F5SZA | - / -3 | 2 | ✓ Closing fragment |
| 11-02 13:01 | 40m | -1 / - | OH3SW | - / -12 | 2 | Partial capture |
| 11-02 12:57 | 40m | -14 / -7 | SP2ADI | 0 / -4 | 5 | ✓ Full exchange observed |
| 11-02 12:56 | 40m | -4 / - | PE1PGA | - / -8 | 2 | ✓ Closing fragment |
| 11-02 12:54 | 40m | -12 / - | DL3LBP | - / -11 | 3 | ✓ Closing fragment |
| 11-02 12:53 | 40m | -14 / - | SP2ADI | - / -7 | 2 | Partial capture |
| 11-02 12:50 | 40m | -6 / -6 | DL1RI/P | -7 / -1 | 4 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 194900 -10 1409 HB9EKJ IU4DTV RR73 195300 -8 1891 CQ IU4DTV JN54 (x2) 195400 -16 1889 SH6ECJ IU4DTV -13 195515 -7 1107 R4FDK IU4DTV -07 (x2) 195800 -8 2008 E75EP IU4DTV RR73 195915 -6 976 IK1QLI IU4DTV -02 195930 -5 974 IU4DTV IK1QLI R+07 195945 -5 975 IK1QLI IU4DTV RR73 200000 -9 974 IU4DTV IK1QLI 73 200145 -10 1600 SV7LWI IU4DTV RR73 200730 -13 2047 IU4PRI IU4DTV -10 200745 -12 2046 IU4DTV IU4PRI R-16 200800 -12 2047 IU4PRI IU4DTV RR73
UTC dB Audio Message 202930 -2 1236 IU4DTV DL1DH R-07 202945 +3 1235 DL1DH IU4DTV RR73 203000 -6 1236 IU4DTV DL1DH 73 203330 +2 1689 SP9NVY IU4DTV -06 203345 -5 1690 IU4DTV SP9NVY R+05 203400 +5 1689 SP9NVY IU4DTV RR73 203415 -5 1689 IU4DTV SP9NVY 73 203430 +5 1575 DL9KM IU4DTV -16 203545 -4 332 IU4DTV SP5JMA KO02 203900 +3 2200 M7PRG IU4DTV RR73 203930 +1 907 RV7KA IU4DTV -04 204200 +6 1934 IU3WOZ IU4DTV -09 204215 -10 1934 IU4DTV IU3WOZ R-07 204230 +10 1933 IU3WOZ IU4DTV RR73 204245 -14 1934 IU4DTV IU3WOZ 73
UTC dB Audio Message 204200 -20 1840 CQ IU4DTV JN54 (x2) 204300 -9 707 SP2EWQ IU4DTV +02 204330 -19 1840 CQ IU4DTV JN54 (x10) 205845 -6 1788 IU4DTV EB5AFK IM98 (x2)
UTC dB Audio Message 135830 -12 754 CQ IU4DTV JN54 (x3) 140000 -16 754 M6RVA IU4DTV -08 140015 -10 754 IU4DTV M6RVA R-18 142345 +0 825 IU4DTV TA4DX R-17 (x3) 144945 -5 1945 IU4DTV RA9LL 73 145115 +4 2363 IU4DTV M7GJO R-09 (x2) 145245 -1 679 IU4DTV G7TWX R-10 (x2) 150330 -2 2443 IU4DTV EA7R RR73 152445 -10 2356 IU4DTV M7YVZ 73
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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