PD4JOH — 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: Netherlands Most frequent locator attributed to this token: JO22

Receiver-side FT8 activity involving PD4JOH, decoded by SO8OO in southeastern Poland. 821 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 79 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-11-05.

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 821 FT8 messages attributed to PD4JOH as the transmitting token by decoded message structure across 79 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (43%), followed by 40 m (36%) and 10 m (21%). Most decodes (51%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

821
Messages attributed
79
UTC dates decoded
253
Active 15-min windows
-15 dB
Estimated median S/N

Bands

40m · 298 20m · 353 10m · 170
First attributed message: 2026-06-07
Last attributed message: 2026-11-05 19:08 UTC

Observed FT8 message patterns

Attributed sample
821 messages
Active dates
79 UTC dates
Estimated median S/N
-15 dB
Estimated 10th-90th percentile
-22 to -8 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 406, moderate (-15 to -9 dB) 331, strong (≥ -8 dB) 84.

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 PD4JOH 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 PD4JOH

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
JO22 · 697 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,201 km (approx.)
Last such locator decoded
2026-11-05 19:08 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 UTCBandPD4JOH S/NCounterpartCounterpart S/NMsgsCapture
11-04 13:18 10m -19 / - K1BX - / - 4 Partial capture
11-03 21:48 40m - / -9 EA7KPT -12 / - 2 ✓ Closing fragment
10-20 20:18 40m -14 / - EX7CQ - / - 3 Partial capture
10-20 20:15 40m -9 / - G4YAN - / -26 5 Partial capture
10-20 20:12 40m -12 / - EB4HDM -17 / -13 4 ✓ Closing observed
10-20 20:12 40m - / - YL3ASK -8 / - 2 Partial capture
10-20 20:09 40m -8 / -17 EA3HLM -13 / -12 5 ✓ Full exchange observed
10-20 20:08 40m -8 / -17 EA3HKY -12 / - 3 ✓ Closing observed
10-20 19:49 40m -12 / -5 DL1TJ -17 / -13 4 ✓ Full exchange observed
10-20 19:40 40m - / - F3CJ -18 / - 3 Partial capture
10-16 07:36 40m -18 / - VK7AC - / - 2 Partial capture
10-11 12:56 40m - / +6 DL1SRS -16 / - 2 Partial capture
10-01 19:38 40m - / - PA2IPA -6 / - 4 Partial capture
09-30 16:17 40m -22 / -16 DF5VB -12 / -11 4 ✓ Full exchange observed
09-27 15:42 40m - / -18 SA4AGM -14 / - 6 ✓ Closing fragment
09-27 13:09 40m - / - SQ7KHW -18 / - 5 Partial capture
09-23 15:29 40m - / -20 OK1ND +11 / - 3 ✓ Closing fragment
09-22 21:02 40m - / - OE9RWH +2 / - 2 Partial capture
09-22 20:59 40m - / -13 RD3FY 0 / - 3 ✓ Closing fragment
09-22 20:51 40m -14 / -9 TA3NK -12 / -17 8 ✓ Full exchange observed
09-22 20:47 40m -14 / -6 G0LCC -15 / - 6 ✓ Closing observed
09-22 20:39 40m - / -4 F1PBZ -2 / - 3 Partial capture
09-22 20:36 40m -16 / - JH5HDA - / - 3 Partial capture
09-20 19:06 40m -10 / - JA4FKX - / - 2 Partial capture
09-20 12:33 40m -19 / -4 OE4OIW +5 / - 4 ✓ Closing observed
09-17 12:57 40m - / 0 DL7CHR -3 / - 2 ✓ Closing fragment
09-15 17:14 40m - / - DK3HJ -1 / - 3 Partial capture
09-15 17:04 40m - / -21 OK2RM -2 / - 3 Partial capture
09-14 20:11 40m -9 / 0 IK2CJJ -3 / - 12 Partial capture
09-14 20:07 40m -12 / -12 IK1EZX -2 / - 6 ✓ Closing observed
09-14 19:54 40m - / - U1BD -20 / - 2 Partial capture
09-14 18:54 40m - / -5 IU2WCY -10 / - 3 ✓ Closing fragment
09-14 18:47 40m - / - DL8TV +12 / - 2 Partial capture
09-14 18:30 40m - / -17 G4RAC -12 / - 5 Partial capture
09-14 15:51 40m - / -5 DD8AH -16 / - 2 Partial capture
09-14 15:48 40m - / -9 OK2BXD +3 / - 2 ✓ Closing fragment
09-14 14:32 40m - / -16 OE5ABL -12 / - 4 Partial capture
09-14 14:12 40m - / -6 DL9NO -11 / - 3 ✓ Closing fragment
09-14 13:58 40m - / -15 OE6OCG -1 / - 3 ✓ Closing fragment
09-11 13:41 40m - / -24 DL7UKM 0 / - 3 ✓ Closing fragment
09-10 15:07 40m - / 0 IK1AIL -6 / - 2 ✓ Closing fragment
09-10 14:58 40m -17 / - SP3IPA - / -2 2 Partial capture
09-10 14:50 40m -16 / +4 DJ0MDC +5 / - 4 ✓ Closing observed
09-09 15:04 40m - / - G7EVY -16 / - 3 Partial capture
09-09 14:31 40m -20 / - DC1ASE -12 / -7 2 Partial capture
09-08 19:07 40m -16 / - MM0YMG - / -9 2 ✓ Closing fragment
09-08 18:55 40m -14 / -23 DF7AA -13 / -9 4 ✓ Full exchange observed
09-08 18:55 40m - / -8 OE3UKW +2 / - 5 ✓ Closing fragment
09-08 18:39 40m -18 / -21 YO8TVD -5 / - 3 ✓ Closing observed
09-08 18:35 40m - / - OZ1EDR -4 / - 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
201300 -17 1240  PD4JOH EB4HDM 73
201315 -14 1241  EB4HDM PD4JOH 73
201500 -20 1241  G4YAN PD4JOH JO22 (x5)
201845 -15 1241  EX7CQ PD4JOH JO22 (x3)
214715 -22 2132  PD4JOH IU8GUK JM88
214815 -13 2175  PD4JOH EA7KPT -09 (x2)
190015 -22 1241  PD4JOH M8FQT IO93
190830 -19 1241  CQ PD4JOH JO22
80m 
UTC    dB Audio  Message
165930 -14 2690  PD4JOH I8OHQ RR73
185845 -17 1328  PD4JOH SQ3POU JO72
10m 
UTC    dB Audio  Message
204230 -19 1296  CQ PD4JOH JO22
204330 -16 1297  LU3YAD PD4JOH RRR
120030 -15 1775  PD4JOH YB1HR RR73
171815 -22 1299  PY2VET PD4JOH 73
174345 -14 1299  CQ PD4JOH JO22
125730 -20 1302  KR4I PD4JOH JO22
125915 -14 2601  PD4JOH PD0HLA -22
130330 -22 1302  W3BL PD4JOH J
131215 -17 1302  KU1CW PD4JOH JO22
131830 -20 1302  K1BX PD4JOH J (x4)
20m 
UTC    dB Audio  Message
223615 -21 1580  CQ PD4JOH JO22 (x3)
070200 -10 1467  PD4JOH VK3BOY -04 (x2)
162145 -17 1278  CQ PD4JOH JO22
162245 -12 1277  YO9FKI PD4JOH RRR
162645 -23 1277  CQ PD4JOH JO22 (x6)
175930 +14 1086  PD4JOH RA6ALD LN05 (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

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