JR8AMF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: QN03

Receiver-side FT8 activity involving JR8AMF, decoded by SO8OO in southeastern Poland. 105 FT8 messages attributed to this token as transmitter, on 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-12 and 2026-08-30.

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 105 FT8 messages attributed to JR8AMF as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Most decodes (98%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (63%); the estimated median was -7 dB.

Overview

105
Messages attributed
9
UTC dates decoded
20
Active 15-min windows
-7 dB
Estimated median S/N

Bands

20m · 105
First attributed message: 2026-06-12
Last attributed message: 2026-08-30 21:35 UTC

Observed FT8 message patterns

Attributed sample
105 messages
Active dates
9 UTC dates
Estimated median S/N
-7 dB
Estimated 10th-90th percentile
-15 to -3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 32, strong (≥ -8 dB) 66.

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 JR8AMF 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 JR8AMF

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
QN03 · 67 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,073 km (approx.)
Last such locator decoded
2026-08-30 21:35 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 UTCBandJR8AMF S/NCounterpartCounterpart S/NMsgsCapture
09-16 20:53 40m - / - LB7ZG +8 / - 2 Partial capture
08-30 21:04 20m - / -13 M0GQC -6 / - 2 ✓ Closing fragment
08-26 21:52 20m -12 / -15 IU3WOH -4 / -12 4 ✓ Full exchange observed
08-26 21:50 20m -14 / -12 EA1PZM -10 / -14 3 Partial capture
08-26 21:31 20m - / -15 EA4FVT -3 / - 2 ✓ Closing fragment
08-24 21:24 20m - / -15 GI0FIX -12 / - 2 ✓ Closing fragment
08-24 21:11 20m - / -15 EA1BQR -4 / - 2 ✓ Closing fragment
08-24 21:00 20m -14 / - OH1JUV - / -14 2 ✓ Closing fragment
08-24 20:56 20m - / -18 EA1AOC +6 / - 3 ✓ Closing fragment
08-24 20:45 20m - / - E77FN +3 / - 2 Partial capture
08-24 20:44 20m - / - PA1VC -7 / - 3 ✓ Closing fragment
08-22 21:13 20m - / -2 IK6RAM -18 / - 2 Partial capture
08-22 20:58 20m - / - M0LAD +9 / - 2 Partial capture
08-21 17:12 20m - / - BH4ECL -13 / - 3 Partial capture
08-21 17:04 20m -10 / - <...> - / - 2 Partial capture
08-21 16:27 40m - / -8 R4CES -8 / - 2 Partial capture
08-21 16:23 40m - / -12 R3PY -8 / - 2 ✓ Closing fragment
08-15 18:30 40m - / -16 EU4U -8 / - 2 ✓ Closing fragment
08-11 21:42 20m - / -17 EA1DR -2 / - 2 ✓ Closing fragment
08-11 20:43 20m - / -24 G0LZX -15 / - 3 Partial capture
08-07 21:27 20m - / -20 EA1FDK -14 / - 5 Partial capture
08-07 21:03 20m - / - DL9KM -14 / - 2 Partial capture
08-07 18:17 20m - / -9 RA4CGX +6 / - 2 ✓ Closing fragment
08-06 20:55 20m - / - EA5RR -3 / - 3 Partial capture
08-06 20:40 20m - / - EA5RR +2 / - 8 Partial capture
08-06 20:30 20m - / -17 G0VXE +8 / - 2 ✓ Closing fragment
08-05 21:04 20m - / - CT7AUT -12 / - 3 ✓ Closing fragment
08-05 20:48 20m - / - EC5CFV -17 / - 2 Partial capture
07-28 21:24 20m - / -16 EA5HJ -8 / - 2 ✓ Closing fragment
07-28 21:20 20m - / -8 HB9OAU -19 / - 2 ✓ Closing fragment
07-28 21:17 20m - / -14 GM3AND -4 / - 3 ✓ Closing fragment
07-26 21:08 20m - / +1 IZ6OUX -13 / - 3 ✓ Closing fragment
07-26 21:06 20m - / - IW2NEF -10 / - 4 Partial capture
07-21 20:48 20m -7 / -6 TA6MMI -17 / -11 4 ✓ Full exchange observed
07-21 20:45 20m -4 / - SY1EKX - / -25 3 Partial capture
07-18 21:19 20m - / - SM3ULU -16 / - 2 Partial capture
07-18 21:17 20m - / +4 OK1KKI +18 / - 2 ✓ Closing fragment
07-18 21:07 20m - / -7 IU5AWQ -12 / - 2 ✓ Closing fragment
07-17 21:33 20m - / - M0IOY -4 / - 4 Partial capture
07-17 21:22 20m - / +5 IZ2LTW -6 / - 5 Partial capture
07-17 21:20 20m - / - F4IBJ -7 / - 7 Partial capture
07-17 21:19 20m - / - M0IOY -19 / - 4 Partial capture
07-17 21:19 20m - / -17 LZ5XP -6 / - 11 Partial capture
07-17 21:11 20m - / -22 <...> +1 / - 3 ✓ Closing fragment
07-17 20:51 20m - / - F4IBJ -1 / - 3 Partial capture
07-16 21:24 20m - / -1 IS0AEL -8 / - 2 Partial capture
07-16 21:10 20m - / -10 EA5N +4 / - 2 ✓ Closing fragment
07-15 21:01 20m - / -18 E77FN -12 / - 3 ✓ Closing fragment
07-15 20:43 20m - / -5 RD6OZ -8 / - 2 ✓ Closing fragment
07-09 21:16 20m - / -16 EC3A -18 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
193845 -10 1731  JR8AMF RV6AVU -12 (x4)
183015  -9 2707  JR8AMF EU4U -16 (x2)
162300  -9 1954  JR8AMF R3PY -12 (x2)
162745 -13 2267  JR8AMF R4CES -08 (x2)
205330  +7  306  JR8AMF LB7ZG JP50 (x2)
20m 
UTC    dB Audio  Message
214830 -15 2270  IZ3GWJ JR8AMF QN03
215000 -10 1983  JR8AMF EA1PZM -12
215000 -15 2270  DK1UJ JR8AMF QN03
215030  -9 1983  JR8AMF EA1PZM -12
215045 -14 2270  EA8AT JR8AMF QN03
215115 -14 2270  EA1PZM JR8AMF R-14
215215 -12 2270  IU3WOH JR8AMF QN03
215230 -10 2180  JR8AMF IU3WOH -15
215245 -12 2270  IU3WOH JR8AMF R-12
215300  +3 2180  JR8AMF IU3WOH RR73
065100 -11 1514  JR8AMF OE3JPC -12
065515 -20 2406  R4FDD JR8AMF QN03
210400  -2 2078  JR8AMF M0GQC -13 (x2)
213500 -20 2334  7Z1DJ JR8AMF QN03

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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee