PD4FH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Netherlands Most frequent locator attributed to this token: JO21

Receiver-side FT8 activity involving PD4FH, decoded by SO8OO in southeastern Poland. 26 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-07-02 and 2026-07-03.

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 26 FT8 messages attributed to PD4FH as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (42%), followed by 40 m (38%) and 20 m (19%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.

Overview

26
Messages attributed
2
UTC dates decoded
8
Active 15-min windows
-11 dB
Estimated median S/N

Bands

80m · 11 40m · 10 20m · 5
First attributed message: 2026-07-02
Last attributed message: 2026-07-03 22:34 UTC

Observed FT8 message patterns

Attributed sample
26 messages
Active dates
2 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-15 to +5 dB
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 12.

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 PD4FH 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 PD4FH

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
JO21 · 18 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,192 km (approx.)
Last such locator decoded
2026-07-03 22:34 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 UTCBandPD4FH S/NCounterpartCounterpart S/NMsgsCapture
07-03 22:45 20m - / -24 8Z1IT -10 / - 2 ✓ Closing fragment
07-03 22:33 40m -10 / - EG4WWA - / - 2 Partial capture
07-03 22:24 80m +2 / - SN2WWA - / -2 2 Partial capture
07-03 22:20 80m - / +5 CR2WWA -15 / - 2 ✓ Closing fragment
07-03 22:19 80m - / - EA3HMM -12 / - 3 Partial capture
07-03 22:19 80m - / - UA4FKT +8 / - 2 Partial capture
07-03 22:12 80m -1 / -10 IR0WWA -10 / - 4 ✓ Closing observed
07-03 22:08 80m - / - UA4FKT +11 / - 3 Partial capture
07-03 22:07 80m +2 / -15 DL3MIB 0 / - 4 ✓ Closing observed
07-03 22:06 80m +2 / +3 DA0WWA +4 / +1 5 ✓ Full exchange observed
07-03 22:03 80m +6 / - 3Z6I - / +2 2 ✓ Closing fragment
07-03 21:31 40m -11 / - EH8WWA - / - 2 Partial capture
07-03 21:27 40m -12 / - SN0WWA - / -7 2 Partial capture
07-03 19:58 20m -15 / - GB2WWA - / - 2 Partial capture
07-03 19:25 40m -15 / - DA0WWA -14 / - 2 ✓ Closing observed
07-03 19:23 40m -13 / +3 SN4WWA -14 / - 3 ✓ Closing observed
07-03 19:20 40m -11 / -8 II3WWA -8 / - 3 ✓ Closing observed
07-03 19:16 40m - / +1 TM2WWA -12 / - 2 ✓ Closing fragment
07-03 19:13 40m - / -11 HG8IT -2 / - 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
140800 -15  758  8A1WWA PD4FH JO21
195545 -16  760  SB9WWA PD4FH JO21
195815  -9  759  TN8GD PD4FH 73
195845 -15  759  GB2WWA PD4FH JO21 (x2)
224545  -9  759  PD4FH 8Z1IT R-24 (x2)
40m 
UTC    dB Audio  Message
192030 -11  727  II3WWA PD4FH JO21
192045  -7  760  PD4FH II3WWA -08 (x2)
192345 -13  728  SN4WWA PD4FH JO21
192400 -14 2071  PD4FH SN4WWA +03 (x2)
192545 -15  728  DA0WWA PD4FH JO21
192630 -14 1827  PD4FH DA0WWA RR73
212715 -12  727  SN0WWA PD4FH JO21 (x2)
213130 -11  727  EH8WWA PD4FH JO21 (x2)
213415 -12  727  EG4WWA PD4FH JO21 (x3)
80m 
UTC    dB Audio  Message
221300  -6  362  PD4FH IR0WWA RR73
221315  -1  695  IR0WWA PD4FH 73
221330 +10  695  PD4FH UA4FKT LO23 (x2)
221900 -10  247  PD4FH EA3HMM JN00
221930  +7  695  PD4FH UA4FKT LO23
221930 -12  248  PD4FH EA3HMM JN00 (x2)
222030 -12  852  PD4FH CR2WWA +05 (x2)
222215  +0  695  SK3WWA PD4FH JO21
222315 +10  695  LA1WWA PD4FH JO21
222445  +2  695  SN2WWA PD4FH JO21 (x2)
222600  +5 2255  PD4FH RR73; PE1HUD <...> -06

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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