JH0AWC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM97

Receiver-side FT8 activity involving JH0AWC, decoded by SO8OO in southeastern Poland. 5 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-07-21.

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 5 FT8 messages attributed to JH0AWC as the transmitting token by decoded message structure across 1 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 -14 dB; no usual signal pattern is inferred.

Overview

5
Messages attributed
1
UTC dates decoded
1
Active 15-min windows
-14 dB
Estimated median S/N

Bands

First attributed message: 2026-07-21
Last attributed message: 2026-07-21 20:55 UTC

Observed FT8 message patterns

Attributed sample
5 messages
Active dates
1 UTC dates
Estimated median S/N
-14 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 3, 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 JH0AWC in decoded directed-looking exchanges:

Most frequent locator attributed to JH0AWC

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
PM97 · 5 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,513 km (approx.)
Last such locator decoded
2026-07-21 20:55 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 UTCBandJH0AWC S/NCounterpartCounterpart S/NMsgsCapture
09-21 17:19 160m - / -18 SP7CDG -2 / - 3 Partial capture
09-19 19:18 160m - / -23 EX7CQ -18 / - 2 Partial capture
09-19 17:34 160m - / -19 EX7CQ -18 / - 4 ✓ Closing fragment
09-03 18:17 160m - / -18 S57MPU +17 / - 3 Partial capture
07-21 20:53 20m -12 / - TU5MM - / - 4 Partial capture
07-07 18:48 20m - / - OE9GWV +5 / - 4 Partial capture

Recent FT8 messages decoded at SO8OO

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

160m
UTC    dB Audio  Message
181715 +16 2402  JH0AWC S57MPU -18 (x3)
173400 -21 1690  JH0AWC EX7CQ R-19 (x6)
171945  -4  765  JH0AWC SP7CDG -18 (x3)
200100  -6 1214  JH0AWC OH3SR RR73 (x2)
20m
UTC    dB Audio  Message
184800 -20  946  JH0AWC TN8GD RR73
184830 -22 1900  JH0AWC YO4DWD -03
184830  -2 2733  JH0AWC OE9GWV JN47
184900 -20 1271  JH0AWC ON5RJ JO20
184900  +5 2733  JH0AWC OE9GWV JN47 (x3)
204700 -19 1332  TU5MM JH0AWC PM97 (x5)

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