KB1NAF — 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: United States Most frequent locator attributed to this token: FN31

Receiver-side FT8 activity involving KB1NAF, decoded by SO8OO in southeastern Poland. 9 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-13 and 2026-10-05.

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 9 FT8 messages attributed to KB1NAF as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (78%), followed by 20 m (22%). In this small sample, the estimated median decoder S/N was -22 dB; no usual signal pattern is inferred.

Overview

9
Messages attributed
3
UTC dates decoded
3
Active 15-min windows
-22 dB
Estimated median S/N

Bands

40m · 7 20m · 2
First attributed message: 2026-08-13
Last attributed message: 2026-10-05 00:12 UTC

Observed FT8 message patterns

Attributed sample
9 messages
Active dates
3 UTC dates
Estimated median S/N
-22 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 0.

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 KB1NAF in decoded directed-looking exchanges:

Most frequent locator attributed to KB1NAF

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
FN31 · 5 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
6,913 km (approx.)
Last such locator decoded
2026-10-05 00:12 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 UTCBandKB1NAF S/NCounterpartCounterpart S/NMsgsCapture
10-05 00:12 40m -19 / -14 EA3AKY -6 / - 2 Partial capture
10-05 00:01 40m -20 / - HC1DAZ - / - 3 Partial capture
10-04 23:59 40m - / - F5PBG -14 / - 2 Partial capture
10-04 23:57 40m -20 / -11 HB9EFK -8 / -8 5 ✓ Full exchange observed
09-25 00:53 40m - / - EB3JT +6 / - 2 Partial capture
09-25 00:16 40m - / -9 EA1IOK -13 / - 2 ✓ Closing fragment
09-25 00:08 40m - / -4 SV3AUW -20 / - 3 ✓ Closing fragment
09-01 22:06 40m - / - DL1SUZ -8 / - 2 Partial capture
09-01 22:06 40m - / - F5PBG +2 / - 3 Partial capture
09-01 21:58 40m - / -16 DK7ZT -4 / - 3 Partial capture
08-16 23:35 20m - / -11 R2BQM -8 / - 2 Partial capture
08-16 23:24 20m - / -16 V31DL -16 / - 5 ✓ Closing fragment
08-16 22:57 20m - / - DH2RL -7 / - 5 Partial capture
08-16 22:21 20m - / -12 YO4NF -10 / - 2 ✓ Closing fragment
08-16 22:08 20m - / - SP5AA -12 / - 2 Partial capture
08-16 22:07 20m - / -11 YO4NF -17 / - 3 Partial capture
08-16 21:44 20m - / -15 UW8SM -6 / - 3 ✓ Closing fragment
08-13 21:04 20m -24 / - US2YW - / - 2 Partial capture
08-10 01:07 20m - / -7 SV2AOB -7 / - 4 ✓ Closing fragment
08-10 01:07 20m - / - HB9TIH -18 / - 5 Partial capture
08-10 00:58 20m - / - HB9TIH -18 / - 2 Partial capture
08-10 00:44 20m - / - HB9TIH -16 / - 4 Partial capture
08-09 19:28 20m - / -15 G5TV -20 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
005345  +7  832  KB1NAF EB3JT JN01
235745 -15 2515  KB1NAF HB9EFK -11 (x3)
235900 -20 1638  HB9EFK KB1NAF R-08
235915  -7 2516  KB1NAF HB9EFK RR73
235945 -16 1595  KB1NAF F5PBG IN78 (x2)
000100 -18 1638  HC1DAZ KB1NAF FN31 (x3)
000615 -24 1641  8P6ET KB1NAF R-20 (x2)
001230 -19 1642  EA3AKY KB1NAF FN31
001245  -6 2122  KB1NAF EA3AKY -14
20m 
UTC    dB Audio  Message
220830 -14 2105  KB1NAF SP5AA JO92
222145 -10 1948  KB1NAF YO4NF -12 (x2)
225745  -5 1948  KB1NAF DH2RL JN68 (x5)
232445 -14 1521  KB1NAF V31DL EK57 (x5)
233545  -8  374  KB1NAF R2BQM -11 (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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