NP4TX — 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: Puerto Rico Most frequent locator attributed to this token: FK68

Receiver-side FT8 activity involving NP4TX, decoded by SO8OO in southeastern Poland. 658 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 23 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-11.

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 658 FT8 messages attributed to NP4TX as the transmitting token by decoded message structure across 23 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (93%), followed by 40 m (7%) and 80 m (0%). Most decodes (99%) fell within the six-hour window 20:00-02:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (85%); the estimated median was -19 dB.

Overview

658
Messages attributed
23
UTC dates decoded
81
Active 15-min windows
-19 dB
Estimated median S/N

Bands

80m · 1 40m · 43 20m · 614
First attributed message: 2026-06-07
Last attributed message: 2026-10-11 01:03 UTC

Observed FT8 message patterns

Attributed sample
658 messages
Active dates
23 UTC dates
Estimated median S/N
-19 dB
Estimated 10th-90th percentile
-22 to -14 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 558, moderate (-15 to -9 dB) 90, strong (≥ -8 dB) 10.

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 NP4TX 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 NP4TX

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
FK68 · 316 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,360 km (approx.)
Last such locator decoded
2026-10-11 01:03 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 UTCBandNP4TX S/NCounterpartCounterpart S/NMsgsCapture
10-19 00:09 40m - / 0 IZ3KLB -22 / - 2 Partial capture
10-19 00:08 40m - / - RD7O 0 / - 5 Partial capture
10-19 00:04 40m - / -14 F1PBZ +2 / - 3 ✓ Closing fragment
10-19 00:01 40m - / - RD7O -2 / - 3 Partial capture
09-28 22:40 40m - / - R2DN -2 / - 12 Partial capture
09-13 21:14 40m - / - 2E0SFN -16 / - 2 Partial capture
09-09 01:01 40m -18 / - HK4T - / -2 3 Partial capture
09-09 00:56 40m -19 / - I4DOR - / -4 3 ✓ Closing fragment
09-09 00:53 40m -20 / - KJ5KRV - / 0 2 ✓ Closing fragment
09-08 00:31 40m - / - CT7ARQ -16 / - 4 Partial capture
09-08 00:21 40m -16 / -6 LZ2KV +10 / +3 7 Partial capture
09-08 00:14 40m -16 / - LB4HK - / - 3 ✓ Closing fragment
08-31 20:15 20m - / - M7DBB +1 / - 5 Partial capture
08-31 20:10 20m - / - G7LMY -15 / - 2 Partial capture
08-31 20:06 20m - / - M7JVT 0 / - 5 Partial capture
08-31 20:06 20m - / -15 PE1LYU -13 / - 2 Partial capture
08-27 18:39 20m - / - F4EGM -7 / - 2 Partial capture
08-21 23:44 20m -17 / - KD2RYX - / - 2 ✓ Closing fragment
08-21 23:42 20m -19 / - KI5SLA - / -12 2 Partial capture
08-21 23:32 20m -20 / - VE2FCV - / -14 2 ✓ Closing fragment
08-21 23:30 20m -19 / - R3FE - / -23 2 Partial capture
08-21 23:28 20m -17 / - NV0J - / +1 2 ✓ Closing fragment
08-21 23:25 20m -18 / - KM7CNT - / -14 3 Partial capture
08-21 23:09 20m - / -8 W2OSR -8 / - 2 Partial capture
08-21 23:06 20m - / - PD3JW -20 / - 4 Partial capture
08-21 22:27 20m - / -15 IZ3GOO -11 / - 5 Partial capture
08-21 22:17 20m - / - YL3KZ -6 / - 3 Partial capture
08-21 21:52 20m - / - YL3KZ -9 / - 2 Partial capture
08-21 01:28 20m -16 / - K9CFA - / -5 2 Partial capture
08-21 01:25 20m -13 / - N9XHN - / 0 3 ✓ Closing fragment
08-21 01:17 20m -18 / -10 EX8ABC -6 / -7 3 ✓ Full exchange observed
08-20 21:48 20m -16 / - SM7HZK - / -16 2 Partial capture
08-20 21:45 20m -15 / - VE3XZF - / -2 3 ✓ Closing fragment
08-19 00:01 40m - / - UD6AWG -16 / - 2 Partial capture
08-18 23:59 40m - / - IU5VLR -20 / - 3 Partial capture
08-18 23:52 40m - / - UR7FM -8 / - 10 Partial capture
08-18 23:44 40m - / -6 EA1RT -12 / - 5 ✓ Closing fragment
08-18 23:34 40m - / - F1IQH -20 / - 4 Partial capture
08-18 23:30 160m - / -4 IW9CTR -10 / - 3 Partial capture
08-18 23:18 40m - / -8 R2SDZ -9 / - 7 ✓ Closing fragment
08-18 23:07 40m - / -2 DB5HA -20 / - 6 Partial capture
08-18 23:05 40m - / -11 F6BHK -18 / - 4 ✓ Closing fragment
08-18 22:52 40m - / -14 EA3AAY -20 / - 2 Partial capture
08-18 22:51 40m - / - F6BHK -18 / - 2 Partial capture
08-18 22:47 40m - / -14 F1PBZ -8 / - 3 ✓ Closing fragment
08-17 19:06 20m - / - DL1AMH -1 / - 3 Partial capture
08-17 19:00 20m - / - ON5CDG +1 / - 3 Partial capture
08-17 18:51 20m - / - IK1EZX -4 / - 4 Partial capture
08-17 18:47 20m - / - PD9ML -12 / - 2 Partial capture
08-17 18:39 20m - / - IK1EZX -6 / - 7 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
234230  -7 2838  NP4TX CT2IOK IN51
000100  +0 1595  NP4TX RD7O KN98 (x3)
000430  +2 2736  NP4TX F1PBZ -14 (x2)
000530 -21 1877  NP4TX IZ3KLB JN55
000530  +0 2736  NP4TX F1PBZ RR73
000800  -3 1595  NP4TX RD7O KN98 (x4)
000930 -23 1877  NP4TX IZ3KLB JN55
001000  +0 1595  NP4TX RD7O KN98
001000 -21 1877  NP4TX IZ3KLB R+00
20m 
UTC    dB Audio  Message
200745  +0 1082  NP4TX M7JVT IO94 (x4)
201015 -13 1307  NP4TX G7LMY IO90 (x2)
201300 -11 1625  R7ZY NP4TX RR73
201345 -18 1182  NP4TX RC5F KO85
201430 -11 1625  CQ NP4TX FK68
201445  -1  787  NP4TX MM0PJQ IO75
201515  +0 1096  NP4TX M7DBB IO92 (x5)
160m 
UTC    dB Audio  Message
233000  -8  993  NP4TX IW9CTR R-04 (x3)
10m 
UTC    dB Audio  Message
191830 -16 1500  NP4TX ON6AA R-11 (x2)
195315 -10 2391  NP4TX F1PBZ -18 (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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