YO9JS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Romania Most frequent locator attributed to this token: KN25

Receiver-side FT8 activity involving YO9JS, decoded by SO8OO in southeastern Poland. 129 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-28.

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 129 FT8 messages attributed to YO9JS 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 (45%), followed by 40 m (33%) and 80 m (22%). Several six-hour UTC windows tied for the largest share (99%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (75%); the estimated median was +1 dB.

Overview

129
Messages attributed
9
UTC dates decoded
20
Active 15-min windows
+1 dB
Estimated median S/N

Bands

80m · 29 40m · 42 20m · 58
First attributed message: 2026-06-06
Last attributed message: 2026-09-28 23:18 UTC

Observed FT8 message patterns

Attributed sample
129 messages
Active dates
9 UTC dates
Estimated median S/N
+1 dB
Estimated 10th-90th percentile
-13 to +13 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 24, strong (≥ -8 dB) 97.

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 YO9JS in decoded directed-looking exchanges:

Most frequent locator attributed to YO9JS

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
KN25 · 11 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
549 km (approx.)
Last such locator decoded
2026-09-28 23:12 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 UTCBandYO9JS S/NCounterpartCounterpart S/NMsgsCapture
10-03 01:43 40m - / -10 KW4BY -16 / - 2 Partial capture
09-30 23:19 40m - / -8 AA6KJ -2 / - 2 ✓ Closing fragment
09-29 19:56 40m - / -6 F1IQH -7 / - 3 Partial capture
09-29 19:46 40m - / -2 UR4LJ -3 / - 3 ✓ Closing fragment
09-28 23:28 40m - / - CT7AUT -16 / - 3 Partial capture
09-28 23:18 80m +12 / +1 R8AIM/4 -16 / -17 4 Partial capture
09-28 23:16 80m - / - DO8JB -2 / - 10 Partial capture
09-28 23:16 80m +10 / -14 EC3A -11 / -16 5 ✓ Full exchange observed
09-28 23:15 80m +10 / - SV5ADM - / -13 2 ✓ Closing fragment
09-28 23:13 80m +11 / - YO3GNF -4 / -1 6 ✓ Full exchange observed
09-28 23:13 80m - / -1 F1PBZ +4 / - 2 Partial capture
09-28 23:12 80m +9 / -2 9A5E +10 / -3 5 ✓ Full exchange observed
09-28 23:12 80m - / -8 R5AV +13 / - 3 ✓ Closing fragment
09-28 23:12 80m - / - RX3ASQ -1 / - 2 Partial capture
09-28 23:11 80m +4 / +7 DD4U -5 / -15 4 ✓ Full exchange observed
09-28 23:09 80m +12 / - IN3WZS +16 / -11 3 ✓ Closing observed
09-28 23:08 80m - / +9 R3ICU 0 / - 2 ✓ Closing fragment
09-28 23:00 40m - / -8 R5DT +8 / - 3 ✓ Closing fragment
09-28 23:00 40m - / - IZ1HJU -6 / - 3 Partial capture
09-28 23:00 40m - / - ON8WR -16 / - 2 Partial capture
09-27 23:20 40m - / +7 ON1JP -20 / - 5 ✓ Closing fragment
09-26 22:10 80m +16 / +3 TA7ARH +3 / -7 2 Partial capture
09-26 22:10 80m +14 / -5 RN6HK +10 / +1 6 ✓ Full exchange observed
09-26 22:09 80m +16 / 0 DL6MRM +8 / -13 5 ✓ Full exchange observed
09-26 22:08 80m +18 / -5 IU5VMC -4 / -11 4 ✓ Full exchange observed
09-26 22:07 80m +13 / - IZ5ILH +6 / -15 3 ✓ Closing observed
09-26 22:06 80m +4 / +2 RY4D -7 / -8 4 ✓ Full exchange observed
09-26 22:05 80m +9 / -13 PE2JMR -1 / - 4 ✓ Closing observed
09-26 21:51 40m - / -12 RZ6AKF +6 / - 2 ✓ Closing fragment
09-26 21:45 40m - / - HB9CNU -8 / - 2 ✓ Closing fragment
09-26 11:33 40m -21 / -16 DD3ZZ -21 / - 2 ✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
232830 -21 1465  YO9JS CT7AUT IM67 (x3)
194615  -8 1377  YO9JS UR4LJ KO80 (x3)
195630  -5  488  YO9JS F1IQH JN27 (x3)
231445  -6  687  YO9JS IW1PPB -20
231915  -5 2589  YO9JS AA6KJ R-08 (x2)
014345 -16 1505  YO9JS KW4BY R-10 (x2)
014515 -11  588  YO9JS KE2FP FN20
80m 
UTC    dB Audio  Message
231715 +10 1131  EC3A YO9JS -16
231730 -10 1226  YO9JS EC3A R-14
231730  +4 1026  YO9JS DO8JB JO32
231800 -14 1226  YO9JS EC3A 73
231800  -4 1026  YO9JS DO8JB JO32
231815 +14 2082  R8AIM/4 YO9JS -17
231830 -21 2175  YO9JS R8AIM/4 R+01
231845 +10 2082  R8AIM/4 YO9JS -17
231900 -10 2175  YO9JS R8AIM/4 R-01
232000  -5 1026  YO9JS DO8JB JO32 (x6)

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.

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