DJ4ZC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO40

Receiver-side FT8 activity involving DJ4ZC, decoded by SO8OO in southeastern Poland. 86 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 6 UTC dates in the available aggregate history. Observed between 2026-07-27 and 2026-08-22.

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 86 FT8 messages attributed to DJ4ZC as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (62%), followed by 20 m (38%). Most decodes (72%) fell within the six-hour window 08:00-14:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (85%); the estimated median was -5 dB.

Overview

86
Messages attributed
6
UTC dates decoded
12
Active 15-min windows
-5 dB
Estimated median S/N

Bands

20m · 33 10m · 53
First attributed message: 2026-07-27
Last attributed message: 2026-08-22 10:43 UTC

Observed FT8 message patterns

Attributed sample
86 messages
Active dates
6 UTC dates
Estimated median S/N
-5 dB
Estimated 10th-90th percentile
-10 to 0 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 73.

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 DJ4ZC 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 DJ4ZC

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
JO40 · 37 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
911 km (approx.)
Last such locator decoded
2026-08-22 10:43 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 UTCBandDJ4ZC S/NCounterpartCounterpart S/NMsgsCapture
08-22 08:58 20m -6 / - 9Y4DG - / -12 4 ✓ Closing fragment
08-22 08:55 20m -12 / -18 3A2MW -12 / -24 5 Partial capture
08-21 13:35 10m -4 / - MI7RDK - / -4 2 Partial capture
08-21 13:31 10m -8 / - YB2AYA - / -20 2 ✓ Closing fragment
08-21 13:30 10m -9 / - HB9IRO - / -4 2 ✓ Closing fragment
08-21 13:28 10m -8 / - YB1KXV - / -11 3 ✓ Closing fragment
08-21 13:18 10m -6 / - SP9ENV - / -8 7 ✓ Closing fragment
08-21 13:16 10m -7 / - 4X1UF - / -18 4 ✓ Closing fragment
08-13 19:56 20m 0 / - N1SK - / -11 2 ✓ Closing fragment
08-13 19:45 20m -3 / - BU2FW - / -17 4 ✓ Closing fragment
08-13 19:36 20m -3 / +4 EI2JHB -11 / -1 4 ✓ Full exchange observed
08-12 13:05 10m 0 / -13 DN9BT -3 / -9 6 ✓ Full exchange observed
08-12 13:05 10m -2 / - 9J2FI - / - 6 Partial capture
08-12 13:00 10m -7 / -20 S55A -10 / -21 7 ✓ Full exchange observed
08-12 12:56 10m -6 / - S55A - / - 2 Partial capture
08-12 12:54 10m -3 / - SP9MOC - / +5 2 ✓ Closing fragment
08-12 12:51 10m -3 / -11 LX1NO +3 / -10 7 ✓ Full exchange observed
08-12 12:49 10m 0 / - ER3CT - / +8 3 ✓ Closing fragment
08-12 12:48 10m 0 / - LX1NO - / - 2 Partial capture
08-12 12:45 10m +1 / - 3A2MW - / -10 3 ✓ Closing fragment
08-11 07:03 20m -8 / - IK2IKW -7 / +10 3 ✓ Full exchange observed
08-11 07:02 20m -3 / - R2EA - / -6 2 ✓ Closing fragment
08-11 06:58 20m -5 / - V31MA - / -7 4 Partial capture
07-27 06:54 20m -14 / - IS0KNW - / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
194730  -8 2334  RD3ADW DJ4ZC -11
194830 -10 2333  BG5JGG DJ4ZC -13
195100 -14 2334  BG7BVI DJ4ZC R-07
195645  +3 2538  N1SK DJ4ZC R-11 (x2)
085545 -12  803  DJ4ZC 3A2MW -18
085600 -13 1804  3A2MW DJ4ZC R-24 (x4)
085830 -12 1804  9Y4DG DJ4ZC JO40 (x4)
104315  -6 2075  KP2B DJ4ZC JO40
10m 
UTC    dB Audio  Message
132030  -8 2022  SP9ENV DJ4ZC R-08 (x4)
132545  -6 1421  YB2AYA DJ4ZC JO40
132815  -5 1421  YB1KXV DJ4ZC JO40 (x3)
133015  -8 1421  HB9IRO DJ4ZC -04 (x2)
133145  -7 1421  YB2AYA DJ4ZC -20 (x2)
133515  -4 1366  MI7RDK DJ4ZC JO40 (x2)
134345  -3 1366  OZ7FOC DJ4ZC JO40

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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