DF4JY — 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: JO31

Receiver-side FT8 activity involving DF4JY, decoded by SO8OO in southeastern Poland. 6 FT8 messages attributed to this token as transmitter, on 40m, across 3 UTC dates in the available aggregate history. Observed between 2026-09-17 and 2026-10-06.

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 6 FT8 messages attributed to DF4JY as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -16 dB; no usual signal pattern is inferred.

Overview

6
Messages attributed
3
UTC dates decoded
4
Active 15-min windows
-16 dB
Estimated median S/N

Bands

40m · 6
First attributed message: 2026-09-17
Last attributed message: 2026-10-06 19:54 UTC

Observed FT8 message patterns

Attributed sample
6 messages
Active dates
3 UTC dates
Estimated median S/N
-16 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 0.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with DF4JY in decoded directed-looking exchanges:

Most frequent locator attributed to DF4JY

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
JO31 · 3 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,054 km (approx.)
Last such locator decoded
2026-10-06 19:54 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 UTCBandDF4JY S/NCounterpartCounterpart S/NMsgsCapture
10-23 14:31 40m - / -10 DJ2VA -6 / - 2 ✓ Closing fragment
10-23 12:58 40m - / -19 DJ4FAN -21 / - 2 ✓ Closing fragment
10-23 12:49 40m - / -4 PD0TV -22 / - 2 ✓ Closing fragment
10-23 12:44 40m - / -17 DJ0MAB -17 / - 2 ✓ Closing fragment
10-17 16:44 40m - / -20 F6CCS -1 / - 3 ✓ Closing fragment
10-08 15:57 40m - / -25 DD6UJS +5 / - 2 ✓ Closing fragment
10-08 15:45 40m - / -9 DG0LHH -3 / - 3 Partial capture
10-08 15:43 40m - / -21 DL7ULA -8 / - 2 Partial capture
10-08 15:26 40m - / -11 PH2W -6 / - 2 ✓ Closing fragment
10-08 15:20 40m - / +1 M0IEP -18 / - 2 ✓ Closing fragment
10-07 19:20 40m - / -13 IZ4PKC +2 / - 2 Partial capture
10-07 18:57 40m - / -18 9A3EYA 0 / - 4 ✓ Closing fragment
10-07 18:44 40m - / -17 F5MXH +8 / - 2 ✓ Closing fragment
10-07 18:12 40m - / -17 IQ5ARI 0 / - 2 ✓ Closing fragment
10-07 17:55 40m - / -20 IU2PVU -1 / - 3 ✓ Closing fragment
10-07 17:46 40m - / -19 EA7KOM +10 / - 2 ✓ Closing fragment
10-07 17:46 40m - / -20 F4ANC 0 / - 5 ✓ Closing fragment
10-07 14:32 40m - / -11 F8DWH -8 / - 2 ✓ Closing fragment
10-07 14:27 40m - / -6 OZ6TL -19 / - 2 ✓ Closing fragment
10-07 13:50 40m - / -12 HB9PLH -4 / - 2 ✓ Closing fragment
10-07 13:27 40m - / -14 DL3RL +2 / - 3 ✓ Closing fragment
10-07 13:21 40m - / -18 DM2GG -12 / - 2 Partial capture
10-07 13:03 40m - / -14 DL1UDO -16 / - 2 ✓ Closing fragment
10-06 21:31 40m - / -19 SQ2RAD -6 / - 2 ✓ Closing fragment
10-06 20:35 40m - / -17 S55A -11 / - 2 ✓ Closing fragment
10-06 20:24 40m - / -16 F4GIH +6 / - 2 Partial capture
10-06 20:21 40m - / -18 G5NGL -6 / - 2 ✓ Closing fragment
10-06 19:54 40m -14 / - EA5RU -16 / - 2 ✓ Closing observed
10-06 17:10 40m - / -20 IZ3NLT +8 / - 2 ✓ Closing fragment
10-06 16:53 40m - / -8 IV3VFR +16 / - 2 ✓ Closing fragment
10-06 16:46 40m - / -13 OK1FED +9 / - 2 ✓ Closing fragment
10-06 16:31 40m - / -24 IZ0SQZ -10 / - 2 ✓ Closing fragment
10-06 16:25 40m - / -12 IK2TCV -4 / - 2 ✓ Closing fragment
10-06 16:16 40m - / -19 IK2TCV -14 / - 2 Partial capture
10-06 16:11 40m - / -20 9A7R +20 / - 6 Partial capture
10-06 16:04 40m - / -20 SP1JQJ +2 / - 2 ✓ Closing fragment
10-06 15:59 40m - / -15 DL6ZB -4 / - 2 ✓ Closing fragment
10-06 15:57 40m - / -25 OK1AWC -6 / - 2 ✓ Closing fragment
10-06 14:46 40m - / -15 OH3EX +8 / - 2 ✓ Closing fragment
10-06 14:27 40m - / -4 DL0MRR +4 / - 2 ✓ Closing fragment
10-06 14:21 40m - / -13 9A7BB 0 / - 2 ✓ Closing fragment
10-06 13:48 40m - / -1 DL2SUD -5 / - 5 Partial capture
10-06 11:43 40m - / -10 DL5RMH +3 / - 2 ✓ Closing fragment
10-06 11:27 40m - / -15 SQ2MMX -6 / - 2 ✓ Closing fragment
10-06 11:16 40m - / -16 DL6EI -9 / - 3 ✓ Closing fragment
10-06 09:26 40m - / -2 IN3IBW -10 / - 2 ✓ Closing fragment
10-05 17:47 40m - / - M1DBX -8 / - 2 ✓ Closing fragment
10-05 15:09 40m - / -11 IN3KSO -6 / - 2 ✓ Closing fragment
10-05 15:05 40m - / -14 G0ORH -9 / - 3 ✓ Closing fragment
10-04 20:18 40m - / - IU5MRK -18 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
164515  -2 1316  DF4JY F6CCS RR73
195315  +8 1740  DF4JY IW4CFN -16
102045 -22 2198  DF4JY G4DBW R-18
211815 -17 1364  DF4JY EA5KT -15
124415 -16 1738  DF4JY DJ0MAB -17 (x2)
124945 -23 1532  DF4JY PD0TV -04 (x2)
125845 -22 1666  DF4JY DJ4FAN -19 (x2)
140215 -11  441  DF4JY DL6EBV -12
140845 -21 2080  DF4JY F4DVP RR73
142015  -3 1051  DF4JY SP5ROM -20
143145  -6 2011  DF4JY DJ2VA -10 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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