F4AHJ — 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: France Most frequent locator attributed to this token: JN23

Receiver-side FT8 activity involving F4AHJ, decoded by SO8OO in southeastern Poland. 1,921 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 45 UTC dates in the available aggregate history. Observed between 2026-06-17 and 2026-10-22.

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 1,921 FT8 messages attributed to F4AHJ as the transmitting token by decoded message structure across 45 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (55%), followed by 20 m (35%) and 10 m (10%). Most decodes (84%) fell within the six-hour window 03:00-09:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

1,921
Messages attributed
45
UTC dates decoded
180
Active 15-min windows
-10 dB
Estimated median S/N

Bands

80m · 3 40m · 1,049 20m · 680 10m · 189
First attributed message: 2026-06-17
Last attributed message: 2026-10-22 07:23 UTC

Observed FT8 message patterns

Attributed sample
1,921 messages
Active dates
45 UTC dates
Estimated median S/N
-10 dB
Estimated 10th-90th percentile
-18 to -2 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 398, moderate (-15 to -9 dB) 754, strong (≥ -8 dB) 769.

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 F4AHJ 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 F4AHJ

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
JN23 · 1,317 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,462 km (approx.)
Last such locator decoded
2026-10-22 07:23 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 UTCBandF4AHJ S/NCounterpartCounterpart S/NMsgsCapture
10-22 07:20 40m -18 / - SQ9DHS - / -15 2 ✓ Closing fragment
10-22 07:17 40m -11 / - M9YLR - / -11 3 Partial capture
10-22 07:10 40m -13 / +7 ON6KHI -12 / -7 5 ✓ Full exchange observed
10-22 07:07 40m -8 / - F4NJU - / -17 3 Partial capture
10-22 07:04 40m -15 / -9 F8ATS -2 / -2 5 ✓ Full exchange observed
10-22 07:03 40m - / -15 F4FSY -17 / - 3 Partial capture
10-22 07:02 40m -17 / - PE1MTT - / -9 2 ✓ Closing fragment
10-22 06:59 40m -16 / - DJ4WM -2 / -9 4 ✓ Closing observed
10-22 06:53 40m -15 / -6 PA4AV -6 / +7 2 Partial capture
10-22 06:51 40m -15 / -9 LZ2INP +5 / -9 5 ✓ Full exchange observed
10-22 06:46 40m -11 / -6 F4MXT/P -6 / +5 2 Partial capture
10-22 06:39 40m -3 / - PA3AGN - / -2 2 ✓ Closing fragment
10-22 06:33 40m -10 / - ON3MOH - / +5 2 ✓ Closing fragment
10-22 06:17 40m -10 / - KJ5PTH - / - 4 ✓ Closing fragment
10-22 06:14 40m -15 / - KJ5PTH - / -22 2 Partial capture
10-22 05:54 40m -10 / - OK2PKT - / -7 3 ✓ Closing fragment
10-22 05:52 40m -7 / - RN3N - / -18 2 ✓ Closing fragment
10-22 05:44 40m -6 / - OM8BCD - / -14 3 Partial capture
10-22 05:36 40m -8 / - SQ8AA - / +6 5 Partial capture
10-22 05:28 40m -4 / - M7KEV - / -17 2 Partial capture
10-22 05:25 40m -5 / - HA6WT - / +1 3 Partial capture
10-22 05:16 40m -1 / -7 TA3NK -10 / 0 7 ✓ Full exchange observed
10-22 05:09 40m - / - TA1LT -14 / - 2 ✓ Closing fragment
10-15 02:01 40m -1 / - W2CG - / -15 3 Partial capture
10-15 01:55 40m +1 / -13 RW4HUD -20 / -14 6 ✓ Full exchange observed
10-15 01:53 40m 0 / - KG4OJT - / - 3 ✓ Closing fragment
10-15 01:51 40m -6 / - R9WJ - / -12 2 Partial capture
10-15 01:46 40m -6 / - VE1JBC - / -10 2 Partial capture
10-15 01:43 40m -2 / - RX7O - / +2 2 ✓ Closing fragment
10-15 01:41 40m -8 / - TA3XEE - / -14 2 ✓ Closing fragment
10-15 01:34 40m +2 / - K1JAK - / -11 2 ✓ Closing fragment
10-15 01:32 40m -4 / - SQ7JZF - / 0 2 ✓ Closing fragment
10-15 01:31 40m -7 / - HA0OH - / +5 2 ✓ Closing fragment
10-15 01:28 40m -1 / - DH1RQA - / -7 2 ✓ Closing fragment
10-15 01:28 40m - / - WK1O -6 / - 4 Partial capture
10-15 01:16 40m -7 / -3 WK1O -8 / -2 11 ✓ Full exchange observed
10-15 01:12 40m 0 / -18 F6FDY -2 / -21 10 ✓ Full exchange observed
10-15 01:12 40m -2 / +7 SV5BYP -11 / +9 5 ✓ Full exchange observed
10-15 01:08 40m 0 / - VE1JBC - / -6 3 ✓ Closing fragment
10-15 01:05 40m -3 / - DK9LF - / -4 2 ✓ Closing fragment
10-15 01:03 40m +1 / - YY5EHT - / -6 3 ✓ Closing fragment
10-15 00:58 40m -4 / - UA9SY - / -1 6 ✓ Closing fragment
10-15 00:56 40m -2 / - BG0FQU - / -10 3 ✓ Closing fragment
10-15 00:55 40m -5 / - GI6KDN - / -5 2 ✓ Closing fragment
10-14 07:17 40m -13 / - G7RCQ - / -7 4 ✓ Closing fragment
10-14 07:01 40m -14 / - PD5WA - / -12 4 ✓ Closing fragment
10-14 06:56 40m -16 / - PD1ADA - / +5 2 ✓ Closing fragment
10-14 06:55 40m -16 / - EA2EED - / +1 2 ✓ Closing fragment
10-14 06:28 40m -17 / - M8FQT - / -3 2 ✓ Closing fragment
10-14 05:55 40m -8 / +9 DL2NYC -14 / 0 3 ✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
071515 -12 1042  CQ F4AHJ JN23 (x4)
071745  -9 1042  M9YLR F4AHJ -11 (x3)
071915 -14 1042  CQ F4AHJ JN23
072045 -17 1042  SQ9DHS F4AHJ -15 (x2)
072145 -15 1042  CQ F4AHJ JN23 (x2)
072245 -18 1041  M9YLR F4AHJ RR73
072315 -16 1042  CQ F4AHJ JN23 (x2)
80m 
UTC    dB Audio  Message
053200 -14 1006  F4AHJ IZ2QPP JN46 (x3)
045830  -9 1009  F4AHJ SQ2JYJ -22 (x3)
050500  -8 1006  F4AHJ F1ROA JN05 (x4)
051030 -10 1694  F4AHJ GM6URC -03 (x3)
051230 -16 1005  F4AHJ EB3JT JN01 (x2)
20m 
UTC    dB Audio  Message
071200  -9 1086  CQ F4AHJ JN23 (x7)
072115  -2 1586  F4AHJ SV5BYP KM46 (x3)
072300 -23 1087  SV5BYP F4AHJ +05
073600 -19 1087  CQ F4AHJ JN23 (x4)
10m 
UTC    dB Audio  Message
103400 -16 1104  CQ F4AHJ JN23                         a1 (x9)
103830  -9 1104  E70SZ F4AHJ -09 (x2)
103930 -15 1104  CQ F4AHJ JN23 (x4)

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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