KF8EFV — 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: EN82

Receiver-side FT8 activity involving KF8EFV, decoded by SO8OO in southeastern Poland. 6 FT8 messages attributed to this token as transmitter, on 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-16 and 2026-08-23.

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 6 FT8 messages attributed to KF8EFV as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -10 dB; no usual signal pattern is inferred.

Overview

6
Messages attributed
2
UTC dates decoded
2
Active 15-min windows
-10 dB
Estimated median S/N

Bands

20m · 6
First attributed message: 2026-06-16
Last attributed message: 2026-08-23 22:03 UTC

Observed FT8 message patterns

Attributed sample
6 messages
Active dates
2 UTC dates
Estimated median S/N
-10 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 2.

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 KF8EFV in decoded directed-looking exchanges:

Most frequent locator attributed to KF8EFV

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
EN82 · 2 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
7,414 km (approx.)
Last such locator decoded
2026-08-23 22:01 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 UTCBandKF8EFV S/NCounterpartCounterpart S/NMsgsCapture
11-05 07:02 80m - / -19 EA3A -9 / - 2 ✓ Closing fragment
11-01 00:57 40m - / -1 KW4BY -14 / - 2 Partial capture
10-21 23:58 40m - / -20 CT9/DF7EE -8 / - 6 Partial capture
10-08 00:55 40m - / -15 9A7W -14 / - 3 ✓ Closing fragment
10-08 00:48 40m - / -17 5B4AMM +5 / - 2 ✓ Closing fragment
10-06 00:15 40m - / -17 EA1ESW -10 / - 2 Partial capture
10-03 22:58 40m - / -10 V47YA -6 / - 2 Partial capture
09-29 19:41 60m - / - 9A4ZM +7 / - 2 Partial capture
09-28 04:54 40m - / -13 LX1TI +3 / - 3 Partial capture
09-23 00:16 40m - / -1 W2GCM -21 / - 2 Partial capture
09-23 00:11 40m - / 0 W3L -14 / - 2 ✓ Closing fragment
09-23 00:01 40m - / -13 K8NWN -16 / - 2 ✓ Closing fragment
09-21 23:35 40m - / -25 NW4TF -3 / - 3 Partial capture
09-21 23:18 40m - / -9 VE3CM +4 / - 3 ✓ Closing fragment
09-10 00:01 40m - / +1 N1TQP -4 / - 2 ✓ Closing fragment
09-09 23:57 40m - / -10 VO1AW -22 / - 2 ✓ Closing fragment
09-05 02:40 40m - / -17 HC1DAZ -16 / - 2 ✓ Closing fragment
09-05 02:02 80m - / -1 N8HRZ -20 / - 2 ✓ Closing fragment
08-24 22:48 20m - / -6 HC7AE -13 / - 5 Partial capture
08-24 21:55 20m - / -24 EA8CVR -10 / - 2 ✓ Closing fragment
08-23 22:01 20m -9 / +7 W1HQL -22 / - 3 ✓ Closing observed
08-21 21:47 20m - / -11 DL3EBJ +7 / - 2 ✓ Closing fragment
08-21 21:39 20m - / -8 DL3EBJ +4 / - 2 Partial capture
08-21 20:10 20m - / -16 OK2CNI +12 / - 2 ✓ Closing fragment
08-16 04:31 40m - / -18 DL8TV -6 / - 3 ✓ Closing fragment
08-16 04:22 40m - / -11 IK2JYT -8 / - 2 ✓ Closing fragment
08-16 03:44 40m - / -4 KS4OT -16 / - 4 ✓ Closing fragment
08-11 04:39 20m - / -7 UA3GIE -4 / - 2 ✓ Closing fragment
08-11 04:31 20m - / -20 RA3RDN +6 / - 6 ✓ Closing fragment
08-11 04:31 20m - / -20 RC5F -7 / - 5 ✓ Closing fragment
08-11 04:28 20m - / -19 RN3GJ -18 / - 3 Partial capture
08-11 04:24 20m - / -10 SV5BYP -14 / - 4 Partial capture
08-11 04:14 20m - / -24 R6OP +12 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
020245 -21  388  KF8EFV N8HRZ R-01 (x2)
013545 -21 2292  KF8EFV WZ4K R-14
070230 -11 2014  KF8EFV EA3A -19 (x2)
40m 
UTC    dB Audio  Message
001530 -10 1146  KF8EFV EA1ESW R-17
004830  +2 2473  KF8EFV 5B4AMM R-17 (x2)
005045 -19 1984  KF8EFV KP4JFR FK68
005500 -14 1051  KF8EFV 9A7W -15 (x3)
235830  -8 1919  KF8EFV CT9/DF7EE -20 (x6)
005715 -12 1289  KF8EFV KW4BY R-01 (x2)
60m 
UTC    dB Audio  Message
194130  +9  835  KF8EFV 9A4ZM JN86 (x2)
013830 -17 1117  KF8EFV P4/WE9V R-14
013900 -16 1117  KF8EFV RR73; VE4JBB <...> -08
20m 
UTC    dB Audio  Message
214800  +6  685  KF8EFV DL3EBJ 73
220100  -9 2772  W1HQL KF8EFV EN82
220115 -22 1763  KF8EFV W1HQL +07 (x2)
220330 -12 2772  KT4ZG KF8EFV R-04
215530 -10 1809  KF8EFV EA8CVR -24 (x2)
224015 -16 1904  KF8EFV YL3NF KO17
224830 -14 1873  KF8EFV HC7AE -06 (x5)
201130 +17 1848  KF8EFV PD2V RR73
223500  -5 2758  KF8EFV EA7R RR73

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