DB4VI — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JN39

Receiver-side FT8 activity involving DB4VI, decoded by SO8OO in southeastern Poland. 89 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 20 UTC dates in the available aggregate history. Observed between 2026-06-20 and 2026-09-06.

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 89 FT8 messages attributed to DB4VI as the transmitting token by decoded message structure across 20 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (44%), followed by 20 m (28%) and 80 m (26%). The busiest six-hour window was 12:00-18:00 UTC, containing 47% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

89
Messages attributed
20
UTC dates decoded
31
Active 15-min windows
-13 dB
Estimated median S/N

Bands

80m · 23 40m · 2 20m · 25 10m · 39
First attributed message: 2026-06-20
Last attributed message: 2026-09-06 21:20 UTC

Observed FT8 message patterns

Attributed sample
89 messages
Active dates
20 UTC dates
Estimated median S/N
-13 dB
Estimated 10th-90th percentile
-22 to -1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 28, moderate (-15 to -9 dB) 37, strong (≥ -8 dB) 24.

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 DB4VI 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 DB4VI

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
JN39 · 65 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,063 km (approx.)
Last such locator decoded
2026-09-06 21:20 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 UTCBandDB4VI S/NCounterpartCounterpart S/NMsgsCapture
09-06 21:18 80m -3 / - 5Z4VJ - / - 3 Partial capture
09-01 09:23 40m - / -14 SP9YGD -3 / - 3 ✓ Closing fragment
08-29 13:24 40m - / -5 OE6PVG 0 / - 3 ✓ Closing fragment
08-29 13:12 40m - / -11 DL1BQR -4 / - 2 ✓ Closing fragment
08-28 17:46 80m - / -8 DH5BO -6 / - 2 ✓ Closing fragment
08-26 23:48 80m -6 / -20 UA9MA -8 / -11 7 Partial capture
08-24 10:43 20m - / - F5SFT +4 / - 3 Partial capture
08-24 10:32 20m -14 / -9 K4RUM -6 / -2 7 ✓ Full exchange observed
08-24 08:44 20m - / - SQ3MZM -9 / - 2 Partial capture
08-23 23:26 80m - / -2 MM0KQC -13 / - 3 Partial capture
08-23 23:25 80m +4 / -8 EW8AAC -4 / -1 5 ✓ Full exchange observed
08-22 09:49 20m - / -18 UA3AIU -8 / - 2 Partial capture
08-16 08:39 20m -10 / - VJ6X - / - 3 Partial capture
08-13 23:25 80m - / - G8OO +3 / - 8 Partial capture
08-13 23:22 80m - / - EA5HM -13 / - 3 ✓ Closing fragment
08-13 23:21 80m - / -12 IQ4JO +5 / - 3 ✓ Closing fragment
08-13 08:20 10m - / - RW6HPS -11 / - 3 Partial capture
08-08 23:53 80m -2 / -12 R5AV -8 / +7 3 ✓ Full exchange observed
08-08 23:49 80m -2 / +7 OH0ERF -15 / -1 6 ✓ Full exchange observed
08-08 23:49 80m -6 / - UA4FKT +2 / - 3 Partial capture
08-08 23:47 80m -2 / - <...> - / -3 2 Partial capture
07-27 09:59 10m - / +6 SH5RJX -22 / - 2 Partial capture
07-19 22:54 80m -4 / - IQ4JO +2 / +8 2 Partial capture
07-19 22:54 80m 0 / -17 UX7QV +5 / - 4 ✓ Closing observed
06-30 16:18 10m -16 / - KP4WWA - / -16 5 ✓ Closing fragment
06-30 16:14 10m -12 / - <...> - / -11 2 Partial capture
06-30 15:26 10m -16 / - PV8AJ - / - 2 Partial capture
06-30 15:24 10m -16 / - A71QQ - / - 2 Partial capture
06-26 16:21 10m -12 / - DN9KB - / -15 6 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m 
UTC    dB Audio  Message
095945 -21 1733  DB4VI SH5RJX RRR
091045 -20 1638  CQ DB4VI JN39 (x2)
091430  -1 2635  DB4VI F1PBZ -14
154545 -13  888  R50RKZ DB4VI JN39
082045 -10 2592  DB4VI RW6HPS LN15 (x3)
101815 -12  787  CQ DB4VI JN39 (x5)
104945 -16 1392  SM5KNV DB4VI JN39
182415 -19 1056  DB4VI PY4DY -08
40m 
UTC    dB Audio  Message
123945  -9  447  DB4VI SP8NFH KN19
144930 -23 1875  DD8AH DB4VI +06
175115 -22 1852  YG2AVB DB4VI JN39
131230  -5 1191  DB4VI DL1BQR -11 (x2)
132415  -3 1264  DB4VI OE6PVG -05 (x3)
092315  -5 1827  DB4VI SP9YGD JO90 (x3)
084600  -4 1651  DB4VI UF6V/UA5D -02
80m 
UTC    dB Audio  Message
232700 -10 1450  DB4VI MM0KQC -02 (x2)
234800 -11 1829  UA9MA DB4VI JN39 (x5)
235145 -11 2152  DB4VI UA9MA -20 (x2)
174600  -6 1409  DB4VI DH5BO R-08 (x2)
172030 -22 1127  RT6Z DB4VI JN39
211815  -4 2116  5Z4VJ DB4VI JN39 (x3)
20m 
UTC    dB Audio  Message
084400 -13  829  DB4VI SQ3MZM JO72 (x2)
102715 -24 1421  F1PPH DB4VI -03
103245 -15 2109  K4RUM DB4VI JN39 (x4)
103430  -7 2729  DB4VI K4RUM -09
103445 -13 2109  K4RUM DB4VI R-02
103500  -6 2728  DB4VI K4RUM RR73
104315  +9 1280  DB4VI F5SFT +12 (x3)
093400 -17 1772  CQ DB4VI JN39 (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.

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