DL4SZB — 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: Fed. Rep. of Germany Most frequent locator attributed to this token: JO63

Receiver-side FT8 activity involving DL4SZB, decoded by SO8OO in southeastern Poland. 812 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, across 44 UTC dates in the available aggregate history. Observed between 2026-06-15 and 2026-10-20.

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 812 FT8 messages attributed to DL4SZB as the transmitting token by decoded message structure across 44 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (50%), followed by 40 m (25%) and 60 m (14%). Most decodes (57%) 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 (82%); the estimated median was -1.8 dB.

Overview

812
Messages attributed
44
UTC dates decoded
129
Active 15-min windows
-1.8 dB
Estimated median S/N

Bands

160m · 68 80m · 409 60m · 117 40m · 202 20m · 16
First attributed message: 2026-06-15
Last attributed message: 2026-10-20 07:36 UTC

Observed FT8 message patterns

Attributed sample
812 messages
Active dates
44 UTC dates
Estimated median S/N
-1.8 dB
Estimated 10th-90th percentile
-11.9 to +7 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 26, moderate (-15 to -9 dB) 123, strong (≥ -8 dB) 663.

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 DL4SZB 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 DL4SZB

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
JO63 · 469 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
723 km (approx.)
Last such locator decoded
2026-10-20 07:36 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 UTCBandDL4SZB S/NCounterpartCounterpart S/NMsgsCapture
10-20 07:33 40m -10 / - DP75BAC - / - 7 Partial capture
10-18 16:47 60m -3 / - H49A - / -23 8 Partial capture
10-18 16:31 60m -18 / - H49A - / -23 2 Partial capture
10-18 16:17 60m -9 / - H49A - / -23 5 Partial capture
10-18 15:54 60m -9 / - H49A - / -23 10 Partial capture
10-18 15:48 60m -16 / - H49A - / - 2 Partial capture
10-17 06:11 60m -9 / 0 SP1ZMO -9 / +9 5 ✓ Full exchange observed
10-17 05:57 60m -12 / -2 DL9KM -20 / -15 4 ✓ Full exchange observed
10-17 05:56 60m -13 / - DA125RH - / -7 2 Partial capture
10-17 05:54 60m -15 / - W8CO - / -24 3 ✓ Closing fragment
10-17 05:52 60m -16 / - ZL2AGY - / -17 3 ✓ Closing fragment
10-17 05:27 60m -9 / - OE/DL1MKW - / - 5 Partial capture
10-12 06:24 40m -19 / +2 G3TKT -24 / -7 4 ✓ Full exchange observed
10-12 06:20 40m -17 / - 9H6C - / -25 6 ✓ Closing fragment
10-08 06:18 60m -2 / 0 G3SHK -4 / +1 4 ✓ Full exchange observed
10-08 06:17 60m -6 / - G8CVS - / -12 3 ✓ Closing fragment
10-08 06:12 60m -8 / -2 F5PBG -20 / -10 5 ✓ Full exchange observed
10-08 06:11 60m -8 / - DM3XD - / -10 3 ✓ Closing fragment
10-02 05:13 80m +8 / - DA6OOM - / -11 2 ✓ Closing fragment
09-30 19:24 80m 0 / - PJ2/W4IPC - / -9 2 Partial capture
09-30 19:15 160m -9 / - JA3BFL - / - 7 Partial capture
09-30 05:37 80m - / -12 PJ2/W4IPC -18 / - 2 Partial capture
09-30 05:32 80m -8 / - GX7RAF/P - / - 9 Partial capture
09-30 05:24 80m -5 / - GX7RAF/P - / - 9 Partial capture
09-29 16:16 80m +3 / - DL0IPA -2 / - 6 ✓ Full exchange observed
09-29 05:28 80m +7 / -14 KF8EXX -16 / -15 10 ✓ Full exchange observed
09-28 16:51 80m +12 / 0 SP2L +1 / - 4 ✓ Full exchange observed
09-28 16:49 80m +7 / - R3ICU -6 / -14 3 ✓ Closing observed
09-28 16:47 80m +4 / - PG9S - / -15 2 ✓ Closing fragment
09-28 16:40 80m -3 / - SO100PKP - / - 8 Partial capture
09-28 05:27 80m +6 / -6 G6PWS -11 / 0 5 ✓ Full exchange observed
09-28 05:25 80m +4 / - DO2NM +7 / +3 5 ✓ Full exchange observed
09-28 05:22 80m +6 / - CT2GQA - / - 2 Partial capture
09-28 05:21 80m +2 / - DL9DAJ - / - 2 Partial capture
09-27 17:49 80m - / -4 DK2MAX +5 / - 2 ✓ Closing fragment
09-27 17:46 80m +13 / +4 UA4FKT +14 / - 5 ✓ Closing observed
09-27 17:45 80m +8 / +10 RL2F -4 / - 4 ✓ Closing observed
09-27 17:34 80m +10 / -3 PA1CTW -10 / -1 4 ✓ Full exchange observed
09-27 17:34 80m +6 / +3 RA6ZS -16 / -13 5 ✓ Closing observed
09-27 17:33 80m - / - UA3LRN +1 / - 2 Partial capture
09-27 17:33 80m +5 / +5 DL9PN -8 / - 4 ✓ Closing observed
09-27 17:33 80m +12 / - E70SZ +8 / -7 3 Partial capture
09-27 17:29 80m +12 / -4 DO9KB +7 / - 3 ✓ Closing observed
09-27 17:24 80m +8 / +7 DK7TX +8 / +1 7 ✓ Full exchange observed
09-27 06:20 80m -4 / - DO8JB - / - 2 Partial capture
09-27 06:15 80m -4 / - SP1MGM +3 / - 5 ✓ Full exchange observed
09-27 06:14 80m -6 / - DO1TC - / -10 2 ✓ Closing fragment
09-27 06:12 80m -1 / -2 DO7RMA -8 / +5 4 ✓ Full exchange observed
09-27 06:12 80m -2 / +10 DA6TAV -14 / -9 5 ✓ Full exchange observed
09-27 06:10 80m +1 / - DO8JB - / +1 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
062145 -14 1793  9H6C DL4SZB JO63 (x4)
062415 -17 1794  G3TKT DL4SZB -07
062430 -23 1794  DL4SZB G3TKT R+02
062445 -21 1794  G3TKT DL4SZB RR73
062500 -24 1794  DL4SZB G3TKT 73
073345  -8 2191  DP75BAC DL4SZB JO63 (x7)
60m 
UTC    dB Audio  Message
161715  -6  800  H49A DL4SZB R-23 (x15)
80m 
UTC    dB Audio  Message
053230  -3 1188  GX7RAF/P DL4SZB JO63 (x8)
053715 -19 1410  DL4SZB PJ2/W4IPC -12 (x2)
192400  -1  987  PJ2/W4IPC DL4SZB JO63 (x2)
192545 -21 1922  DL4SZB RC9WC -13
051345  +7  938  DA6OOM DL4SZB R-11 (x2)
160m 
UTC    dB Audio  Message
194600 -17 1066  DL4SZB SP3IPA -09
194815  -5 1359  RI1FJZ DL4SZB R-19 (x7)
191500  -4  723  JA3BFL DL4SZB JO63 (x7)
20m 
UTC    dB Audio  Message
091045  -2 2503  VP5G DL4SZB JO63 (x10)

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

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee