DF4HW — 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: JO53

Receiver-side FT8 activity involving DF4HW, decoded by SO8OO in southeastern Poland. 38 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-25 and 2026-10-21.

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 38 FT8 messages attributed to DF4HW as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (61%), followed by 80 m (39%). Several six-hour UTC windows tied for the largest share (71%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -17 dB.

Overview

38
Messages attributed
4
UTC dates decoded
8
Active 15-min windows
-17 dB
Estimated median S/N

Bands

80m · 15 40m · 23
First attributed message: 2026-06-25
Last attributed message: 2026-10-21 17:42 UTC

Observed FT8 message patterns

Attributed sample
38 messages
Active dates
4 UTC dates
Estimated median S/N
-17 dB
Estimated 10th-90th percentile
-24 to -10 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 21, moderate (-15 to -9 dB) 15, strong (≥ -8 dB) 2.

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 DF4HW 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 DF4HW

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
JO53 · 23 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
841 km (approx.)
Last such locator decoded
2026-10-21 17:42 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 UTCBandDF4HW S/NCounterpartCounterpart S/NMsgsCapture
10-21 17:42 80m -20 / - RK4HS - / - 2 Partial capture
10-21 17:36 80m - / -5 OZ3AEV -12 / - 2 ✓ Closing fragment
10-21 17:33 80m -14 / - EX8BT - / - 3 Partial capture
10-21 17:30 80m -20 / - LB8VE - / -11 3 ✓ Closing fragment
10-21 17:20 80m -15 / - R4DI - / - 2 Partial capture
10-21 17:16 80m -13 / -8 DO1SPK -18 / -2 3 ✓ Full exchange observed
10-21 17:14 80m -17 / -1 DK6WH -3 / - 4 ✓ Closing observed
10-21 17:02 40m -16 / -13 F1PBZ +1 / -2 5 ✓ Full exchange observed
10-11 10:53 40m - / -12 OE5KBO -7 / - 2 ✓ Closing fragment
10-10 13:20 40m - / -20 UR5FLN -7 / - 2 ✓ Closing fragment
09-27 10:42 40m - / -9 SQ7KHW -18 / - 2 ✓ Closing fragment
09-27 09:58 40m - / -12 OE4RGC +3 / - 2 ✓ Closing fragment
09-27 09:55 40m - / -13 SP7VCL -9 / - 2 ✓ Closing fragment
09-13 16:05 40m -8 / - R9SAP - / - 3 Partial capture
09-13 16:03 40m -12 / -20 II8IHBC -14 / -15 3 Partial capture
09-13 08:51 40m -21 / - M6MHG - / -9 8 Partial capture
09-13 08:37 40m - / - DF7NO -15 / - 9 Partial capture
08-01 10:09 40m - / -2 DH9DR -20 / - 2 ✓ Closing fragment
07-26 11:26 40m - / -15 YO6LRV -8 / - 2 ✓ Closing fragment
07-26 11:16 40m - / -5 SP9CXN -24 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
171730 -21 2403  DF4HW DO1SPK RR73
171845 -15 1730  R7CD DF4HW JO53
172015 -13 2019  R4DI DF4HW JO53 (x2)
173045 -21 1622  LB8VE DF4HW JO53 (x3)
173245 -15 1869  RN7A DF4HW JO53
173315 -14 2520  EX8BT DF4HW JO53 (x3)
173600 -14 2447  DF4HW OZ3AEV -05 (x2)
174200 -22 1822  RK4HS DF4HW JO53 (x2)
40m 
UTC    dB Audio  Message
105330 -13 1613  DF4HW IV3IHV -17
132030  -7 1930  DF4HW UR5FLN -20 (x2)
105330  -4 1316  DF4HW OE5KBO -12 (x2)
170145 -15 1535  S55X DF4HW JO53
170215 -15 1535  CQ DF4HW JO53
170230  -2 2536  DF4HW F1PBZ -13
170245 -15 1535  CQ DF4HW JO53
170300  +3 2537  DF4HW F1PBZ -13
170315 -17 1535  F1PBZ DF4HW R-02
170330 -14 1583  DF4HW G8TKY IO93
170330  +2 2536  DF4HW F1PBZ RR73
170345 -16 1536  F1PBZ DF4HW 73
170415 -15 1740  R4PFY DF4HW JO53

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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