5B4AMH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Cyprus

Receiver-side FT8 activity involving 5B4AMH, decoded by SO8OO in southeastern Poland. 182 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-25 and 2026-09-16.

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 182 FT8 messages attributed to 5B4AMH as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (60%), followed by 20 m (40%). Most decodes (55%) fell within the six-hour window 19:00-01:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -5 dB.

Overview

182
Messages attributed
10
UTC dates decoded
26
Active 15-min windows
-5 dB
Estimated median S/N

Bands

40m · 110 20m · 72
First attributed message: 2026-06-25
Last attributed message: 2026-09-16 20:15 UTC

Observed FT8 message patterns

Attributed sample
182 messages
Active dates
10 UTC dates
Estimated median S/N
-5 dB
Estimated 10th-90th percentile
-17 to +7 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 26, moderate (-15 to -9 dB) 47, strong (≥ -8 dB) 109.

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 5B4AMH 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.

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 UTCBand5B4AMH S/NCounterpartCounterpart S/NMsgsCapture
09-16 20:17 40m - / - R1BNJ +7 / - 2 Partial capture
09-16 20:05 40m -12 / - KG6JDX - / -20 5 Partial capture
09-16 20:03 40m -13 / - JM1DVM - / -20 3 ✓ Closing fragment
09-16 19:59 40m -17 / -4 HB9ELE +12 / - 5 ✓ Closing observed
09-16 19:58 40m -13 / -15 HS0ZKB -9 / -5 4 ✓ Full exchange observed
09-16 19:57 40m -8 / - EI8GS - / -15 2 Partial capture
09-16 16:17 40m -9 / - S79/DL2SBY - / -11 3 Partial capture
09-14 16:37 40m -4 / - ZS6NX - / -18 2 Partial capture
09-11 02:08 40m -8 / -17 PV8AJ -14 / -11 3 ✓ Full exchange observed
09-11 00:55 40m -2 / - J38DX -5 / -13 5 Partial capture
09-11 00:51 40m +2 / - 9Z4S - / -13 7 Partial capture
09-11 00:50 40m +8 / - SP7NC - / -4 2 Partial capture
09-11 00:48 40m +5 / - J38LD - / -19 4 ✓ Closing fragment
09-11 00:46 40m -2 / - 9J2FI - / -12 3 ✓ Closing fragment
09-11 00:45 40m -2 / - RC9OC - / -6 2 ✓ Closing fragment
09-11 00:43 40m -5 / - KS1WK - / -15 3 Partial capture
09-11 00:41 40m -5 / -18 JY5IB -18 / -14 5 ✓ Full exchange observed
09-11 00:39 40m -4 / - EM70WWW - / -12 4 Partial capture
09-11 00:36 40m +2 / - KD3DIX - / -15 4 ✓ Closing fragment
09-11 00:33 40m +7 / - VU2KPH - / -19 2 ✓ Closing fragment
09-11 00:30 40m +5 / - PV8AJ - / -8 5 Partial capture
09-11 00:27 40m +6 / - BI4VIP -14 / -2 4 ✓ Closing observed
09-11 00:25 40m 0 / - HC1DAZ - / -14 3 ✓ Closing fragment
09-11 00:20 40m +6 / - IZ8PPI - / -7 7 ✓ Closing fragment
09-11 00:19 40m +6 / - DK8HC - / -10 3 Partial capture
09-11 00:17 40m +8 / - HB9CEV - / -9 2 ✓ Closing fragment
09-11 00:16 40m +8 / - UB3PAQ - / -2 2 ✓ Closing fragment
09-11 00:12 40m +2 / - OA4ENG - / -14 7 ✓ Closing fragment
09-11 00:09 40m +5 / - OH1ZE - / -14 2 ✓ Closing fragment
09-11 00:06 40m +4 / - OA4ENG - / -15 2 Partial capture
09-11 00:05 40m +2 / -12 MI7XHT -7 / -15 4 ✓ Full exchange observed
09-11 00:02 40m +1 / - VA3LG - / -18 5 Partial capture
09-11 00:01 40m 0 / - PV8AJ - / -7 2 Partial capture
08-30 10:43 20m -7 / -2 RK6OV +8 / - 5 ✓ Closing observed
08-30 10:38 20m -8 / - HI8J - / -18 3 Partial capture
08-30 09:06 10m - / -14 EX8ABR -19 / - 2 ✓ Closing fragment
08-28 14:00 20m -7 / - PD1ADA -16 / -5 5 ✓ Closing observed
07-20 10:36 20m -17 / - 5N0YEN - / -14 3 Partial capture
07-20 10:25 20m - / -5 4O4DB -18 / - 2 ✓ Closing fragment
07-20 08:59 10m - / - R7DX -15 / - 3 Partial capture
07-16 15:14 20m -14 / - S21IM - / -15 5 Partial capture
07-16 15:09 20m -11 / - S56OB - / -16 2 Partial capture
07-16 15:01 20m -16 / - AP2TN - / -13 10 Partial capture
07-16 14:57 20m -19 / - AP2TN - / -11 3 Partial capture
07-16 14:53 20m -15 / - AP2TN - / -16 2 Partial capture
07-16 14:50 20m -13 / - SM3ULU - / - 3 ✓ Closing fragment
07-16 14:46 20m -14 / - SM3ULU - / -13 2 Partial capture
07-16 14:41 20m -15 / - FK8GU - / -12 4 ✓ Closing fragment
07-16 14:12 20m -14 / - S09S - / -5 3 Partial capture
07-16 13:43 20m -14 / - S09S - / -14 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
200015 +14  739  5B4AMH HB9ELE JN47 (x2)
200100 -17 1950  HB9ELE 5B4AMH RR73
200115 +17  739  5B4AMH HB9ELE 73
200300 -10 1950  JM1DVM 5B4AMH -20 (x3)
200500 -12 1950  KG6JDX 5B4AMH -20 (x5)
201530  -5 1950  EI8GS 5B4AMH -14
201715  +6 2757  5B4AMH R1BNJ KO59 (x2)
20m 
UTC    dB Audio  Message
140030 -18 2035  5B4AMH PD1ADA JO21
140115  -6 1529  PD1ADA 5B4AMH RR73 (x3)
140730  +4  488  C31KC 5B4AMH -11 (x2)
103815 -11  581  HI8J 5B4AMH -18 (x3)
104115  -9 1499  E75W 5B4AMH -08
104300  +8  662  5B4AMH RK6OV KN97 (x4)
104445  -7 1499  RK6OV 5B4AMH RR73
10m 
UTC    dB Audio  Message
100215  +1  619  5B4AMH SV2CLJ R-14 (x2)
105845 -14 1829  5B4AMH PA3BQC JO22 (x3)
085945 -11 1408  5B4AMH R7DX KN84 (x3)
090630 -21 1376  5B4AMH EX8ABR R-14 (x2)

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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