9A1BTU — 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: Croatia Most frequent locator attributed to this token: JN85

Receiver-side FT8 activity involving 9A1BTU, decoded by SO8OO in southeastern Poland. 1,809 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 29 UTC dates in the available aggregate history. Observed between 2026-07-04 and 2026-11-05.

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 1,809 FT8 messages attributed to 9A1BTU as the transmitting token by decoded message structure across 29 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (70%), followed by 40 m (29%) and 20 m (0%). Most decodes (91%) 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 (80%); the estimated median was +5 dB.

Overview

1,809
Messages attributed
29
UTC dates decoded
165
Active 15-min windows
+5 dB
Estimated median S/N

Bands

80m · 1,275 40m · 526 20m · 8
First attributed message: 2026-07-04
Last attributed message: 2026-11-05 20:08 UTC

Observed FT8 message patterns

Attributed sample
1,809 messages
Active dates
29 UTC dates
Estimated median S/N
+5 dB
Estimated 10th-90th percentile
-12 to +13 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 103, moderate (-15 to -9 dB) 262, strong (≥ -8 dB) 1,444.

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 9A1BTU 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 9A1BTU

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
JN85 · 772 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
610 km (approx.)
Last such locator decoded
2026-11-05 20:01 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 UTCBand9A1BTU S/NCounterpartCounterpart S/NMsgsCapture
11-05 20:07 80m +3 / - JA9PPC - / -22 3 ✓ Closing fragment
11-05 20:01 80m +7 / - M0JAV - / -12 2 ✓ Closing fragment
11-05 19:58 80m +8 / -10 DK3TNA -10 / -15 5 ✓ Full exchange observed
11-05 19:57 80m +5 / - JA9PPC - / -24 2 Partial capture
11-05 19:56 80m +7 / - 9A2WA - / -8 2 ✓ Closing fragment
11-05 19:54 80m +3 / +8 IV3JTG +2 / +2 5 ✓ Full exchange observed
11-05 19:52 80m +4 / -18 PE1NPS -5 / -15 7 ✓ Full exchange observed
11-05 19:51 80m +6 / - SV2ROG - / -7 3 ✓ Closing fragment
10-24 08:50 40m -7 / -10 DM5KK -4 / +2 6 ✓ Full exchange observed
10-24 08:49 40m -14 / -5 DH2NJS -14 / -1 4 ✓ Full exchange observed
10-24 08:47 40m -4 / - F4NKT - / -8 2 ✓ Closing fragment
10-24 08:47 40m -5 / -4 DH1NGL -11 / -1 5 ✓ Full exchange observed
10-09 19:12 80m - / 0 LY8O 0 / - 2 ✓ Closing fragment
10-08 18:31 80m +7 / +5 YO3AI -4 / -3 3 Partial capture
10-07 21:30 40m - / -6 MM7FTH -8 / - 2 Partial capture
10-07 21:29 40m - / - US2YW -4 / - 2 Partial capture
10-07 21:25 40m -8 / +1 EA3HMM -1 / -5 7 ✓ Full exchange observed
10-06 19:54 40m -1 / +2 DL9PN -3 / -11 4 ✓ Full exchange observed
10-06 19:54 40m -3 / - G6MTI -14 / -21 8 Partial capture
10-06 19:53 40m -4 / -3 F6FHZ -8 / +3 5 ✓ Full exchange observed
10-06 19:51 40m -2 / -10 HA7TM +8 / +9 5 ✓ Full exchange observed
10-06 19:50 40m - / - F1PBZ -6 / - 4 Partial capture
10-06 19:50 40m -5 / - SP9UPH -10 / +9 4 ✓ Closing observed
10-06 19:49 40m -5 / -8 TA3ZZ -16 / - 3 Partial capture
10-06 19:47 40m -2 / - LY4Q +2 / -1 4 ✓ Closing observed
10-06 19:45 40m -6 / - V51WH - / -14 3 ✓ Closing fragment
10-06 19:43 40m - / +4 DK6WS -5 / - 3 ✓ Closing fragment
10-05 09:17 40m -12 / - IU8RFW - / +6 2 ✓ Closing fragment
10-05 09:16 40m -12 / - OS4K -18 / -23 5 ✓ Closing observed
10-05 09:14 40m -10 / - MI7XHT - / -16 3 ✓ Closing fragment
10-05 09:13 40m -11 / - OR7K - / -4 3 ✓ Closing fragment
09-19 21:01 40m - / -2 RN3AOE +5 / - 5 ✓ Closing fragment
09-19 21:00 40m - / - OE9GWV -1 / - 4 Partial capture
09-19 20:55 40m - / -8 PE1NPS -5 / - 3 ✓ Closing fragment
09-19 20:54 40m - / +3 SH5RJX -5 / - 2 Partial capture
09-19 20:53 40m - / - PD4RJ -13 / - 2 Partial capture
09-19 10:04 40m - / - PD4AH -19 / - 2 Partial capture
09-19 09:59 40m - / - SP6K -7 / - 7 Partial capture
09-18 19:31 40m +2 / - ER1CW - / -6 2 ✓ Closing fragment
09-17 21:24 80m - / - SP3SWJ -8 / - 7 Partial capture
09-17 21:20 80m -2 / - G3SZG - / -14 3 ✓ Closing fragment
09-17 21:18 80m -4 / - OK2VCR -4 / +9 4 ✓ Full exchange observed
09-17 21:18 80m +8 / - F1IQH -15 / -18 3 ✓ Closing observed
09-17 21:16 80m +3 / - IK1NEG - / - 2 Partial capture
09-17 21:12 80m +4 / - F5MYK -23 / -14 5 ✓ Closing observed
09-17 17:45 80m +8 / +2 IZ8VYU +7 / - 5 ✓ Full exchange observed
09-17 17:44 80m +10 / +5 OE8CNI +2 / - 4 ✓ Full exchange observed
09-17 17:42 80m +10 / -5 R5DT +10 / +2 5 ✓ Full exchange observed
09-17 17:40 80m +10 / -11 RC2Y +3 / -6 6 ✓ Full exchange observed
09-17 17:39 80m +3 / -9 R7AW -10 / -24 4 ✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
195830  +9 1149  CQ 9A1BTU JN85
195845  -9 1704  9A1BTU DK3TNA JO62
195900  +6 1149  DK3TNA 9A1BTU -15
195915  -9 1704  9A1BTU DK3TNA R-10
195930 +11 1149  DK3TNA 9A1BTU RR73
195945 -13 1703  9A1BTU DK3TNA 73
200000  +6 1149  CQ 9A1BTU JN85 (x3)
200115 -14 1149  9A1BTU PC2J JO22
200130 +11 1149  M0JAV 9A1BTU -12 (x2)
200700  +4 1149  JA9PPC 9A1BTU -22 (x3)
40m 
UTC    dB Audio  Message
084745  -9 1683  9A1BTU DH1NGL -04
084800  -4 1106  F4NKT 9A1BTU RR73
084815  -4 1683  9A1BTU DH1NGL -04
084830  -6 1106  DH1NGL 9A1BTU R-01 (x2)
084915 -14 1107  9A1BTU DH2NJS JO50
085000 -13 1106  DH2NJS 9A1BTU -01
085015 -13 1106  9A1BTU DH2NJS R-05
085030 -15 1106  DH2NJS 9A1BTU RR73
085045  -9 1686  9A1BTU DM5KK JO60 (x2)
085130  -7 1106  DM5KK 9A1BTU +02
085145  -1 1160  9A1BTU DM5KK R-10
085200  -7 1106  DM5KK 9A1BTU RR73
085215  -5 1160  9A1BTU DM5KK 73
160m 
UTC    dB Audio  Message
174315  -5  713  9A1BTU R5DT 73

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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