PA3CDX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Netherlands Most frequent locator attributed to this token: JO22

Receiver-side FT8 activity involving PA3CDX, decoded by SO8OO in southeastern Poland. 50 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 7 UTC dates in the available aggregate history. Observed between 2026-07-04 and 2026-09-17.

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 50 FT8 messages attributed to PA3CDX as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (80%), followed by 40 m (16%) and 10 m (4%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

50
Messages attributed
7
UTC dates decoded
12
Active 15-min windows
-9 dB
Estimated median S/N

Bands

40m · 8 20m · 40 10m · 2
First attributed message: 2026-07-04
Last attributed message: 2026-09-17 14:37 UTC

Observed FT8 message patterns

Attributed sample
50 messages
Active dates
7 UTC dates
Estimated median S/N
-9 dB
Estimated 10th-90th percentile
-20 to +1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 17, strong (≥ -8 dB) 24.

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 PA3CDX 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 PA3CDX

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 · 21 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,201 km (approx.)
Last such locator decoded
2026-09-17 14:37 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 UTCBandPA3CDX S/NCounterpartCounterpart S/NMsgsCapture
09-17 14:37 40m -10 / -5 OK3BR -8 / +1 4 ✓ Full exchange observed
09-17 14:34 40m -12 / - GM5CAR - / -18 4 ✓ Closing fragment
09-17 14:32 40m - / -2 DJ0BS -12 / - 3 ✓ Closing fragment
09-17 14:31 40m -14 / - M5AFO - / -3 2 ✓ Closing fragment
08-30 11:33 20m -20 / - SQ8GMW - / - 4 Partial capture
08-30 11:28 20m +4 / - OH3DJP - / -1 2 Partial capture
08-30 11:26 20m -1 / -5 EA4IVO -12 / +8 9 ✓ Full exchange observed
08-30 11:26 20m - / - OE9GWV -10 / - 5 Partial capture
08-30 11:21 20m - / - PD1HPB +3 / - 7 Partial capture
08-30 11:18 20m 0 / - AO5FSB - / -3 3 ✓ Closing fragment
08-28 15:23 40m - / -17 SQ3WL +10 / - 2 ✓ Closing fragment
08-06 13:51 20m - / -16 IK5EEA -13 / - 2 ✓ Closing fragment
07-29 15:24 20m - / -5 F4BJN -12 / - 2 Partial capture
07-28 15:02 20m - / +2 F5SFT -8 / - 2 ✓ Closing fragment
07-22 12:27 20m - / -8 S53MJ -8 / - 3 ✓ Closing fragment
07-22 12:18 20m - / -6 F1PBZ -22 / - 2 Partial capture
07-22 11:27 20m - / -20 DL1YS -12 / - 2 Partial capture
07-18 12:38 10m - / -25 M0BEW -8 / - 2 Partial capture
07-18 11:48 20m - / -5 IT9SBE -10 / - 2 ✓ Closing fragment
07-18 11:46 20m - / -11 F4IIX -8 / - 5 ✓ Closing fragment
07-17 13:30 20m - / -13 UA9LAO +4 / - 2 Partial capture
07-11 14:40 20m - / -4 F4FSY -18 / - 2 Partial capture
07-11 13:52 20m -11 / - A61DD - / -5 2 Partial capture
07-10 08:07 20m - / -11 EA1IOK -9 / - 3 ✓ Closing fragment
07-09 11:58 20m - / -3 DG7CF -14 / - 2 ✓ Closing fragment
07-04 13:23 20m - / -5 SV2HTW -6 / - 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
152400 +11  411  PA3CDX SQ3WL RR73
141045 -19 1277  PA3CDX DL1NB RR73
143100 -15  689  M5AFO PA3CDX R-03 (x2)
143215 -15 1662  PA3CDX DJ0BS JO52 (x3)
143430 -11  691  GM5CAR PA3CDX JO22 (x4)
143715 -12  704  OK3BR PA3CDX JO22
143730  -7 1158  PA3CDX OK3BR -05
143745  -9  704  OK3BR PA3CDX R+01
143800  -8 1158  PA3CDX OK3BR RR73
20m 
UTC    dB Audio  Message
112815  +3 1431  OH3DJP PA3CDX JO22
112830 -12 2683  PA3CDX OE9GWV JN47
112830 -12  996  PA3CDX EA4IVO RR73
112845  +4 1431  OH3DJP PA3CDX R-01
112915  +1 1431  EA4IVO PA3CDX 73 (x2)
113115  -9 1431  OH3DJP PA3CDX 73
113300 -17 1429  SQ8GMW PA3CDX JO22 (x4)
113630 -23 1427  YU7AS PA3CDX 73
114330 -15 1433  R9UBE PA3CDX JO22
120000  -4  929  PA3CDX IU8WRA JM89
120600  +6 2216  PA3CDX IQ4JO JN63
10m 
UTC    dB Audio  Message
121930 -21 1440  PA3CDX EA3DYI R-10
123845  -8  727  PA3CDX M0BEW -25 (x2)
123945 -13  732  PA3CDX IK1MJK/P JN35
150730 -13  705  EC2ATM PA3CDX +16
153445 -23 1547  TN8GD PA3CDX -11
134030 -21 1305  PA3CDX F6BZQ 73

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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