SA4JAJ — 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: Sweden Most frequent locator attributed to this token: JO79

Receiver-side FT8 activity involving SA4JAJ, decoded by SO8OO in southeastern Poland. 150 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 13 UTC dates in the available aggregate history. Observed between 2026-07-04 and 2026-09-26.

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 150 FT8 messages attributed to SA4JAJ as the transmitting token by decoded message structure across 13 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (70%), followed by 160 m (17%) and 40 m (9%). Several six-hour UTC windows tied for the largest share (99%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

150
Messages attributed
13
UTC dates decoded
32
Active 15-min windows
-15 dB
Estimated median S/N

Bands

160m · 26 80m · 105 40m · 14 20m · 5
First attributed message: 2026-07-04
Last attributed message: 2026-09-26 21:52 UTC

Observed FT8 message patterns

Attributed sample
150 messages
Active dates
13 UTC dates
Estimated median S/N
-15 dB
Estimated 10th-90th percentile
-24 to -8 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 69, moderate (-15 to -9 dB) 63, strong (≥ -8 dB) 18.

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 SA4JAJ 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 SA4JAJ

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
JO79 · 85 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,148 km (approx.)
Last such locator decoded
2026-09-26 21:52 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 UTCBandSA4JAJ S/NCounterpartCounterpart S/NMsgsCapture
10-17 10:29 10m - / - EA5JXJ -12 / - 2 Partial capture
09-26 21:50 160m -15 / - LZ7VV - / - 3 Partial capture
09-26 21:25 160m - / - LA9JKA -14 / - 2 Partial capture
09-26 21:24 160m -21 / - LZ7VV - / - 4 Partial capture
09-26 21:19 160m -22 / - LA9JKA -16 / - 3 Partial capture
09-26 21:13 160m -23 / - LA9JKA -11 / - 8 Partial capture
09-26 21:09 160m - / -10 RU3ACA -6 / - 2 ✓ Closing fragment
09-26 21:01 160m - / -8 SP3FAR +9 / - 5 ✓ Closing fragment
09-26 21:00 160m -18 / -15 DF2AJ -10 / -12 5 ✓ Full exchange observed
09-26 21:00 160m - / -17 HF5A +3 / - 5 ✓ Closing fragment
09-26 20:36 160m -15 / -12 G7KCK -8 / - 4 ✓ Closing observed
09-26 20:11 160m -22 / - LZ7VV - / - 2 Partial capture
09-26 19:38 160m - / -12 DK2EU +9 / - 3 ✓ Closing fragment
09-26 19:38 160m -21 / - RN1CW +4 / - 5 Partial capture
09-26 19:23 160m - / -24 HA5AO +10 / - 3 ✓ Closing fragment
09-26 19:15 160m - / -19 YL2EA -10 / - 3 ✓ Closing fragment
09-26 19:14 160m - / -16 R5AV -6 / - 2 ✓ Closing fragment
09-26 19:01 160m - / -12 DL7UKM -8 / - 2 ✓ Closing fragment
09-26 19:01 160m - / - LA9JKA -19 / - 6 ✓ Closing fragment
09-26 18:57 160m - / -4 UT7UA +10 / - 3 ✓ Closing fragment
09-13 09:26 40m - / -16 SP1LJZ -13 / - 3 ✓ Closing fragment
09-05 19:21 40m -18 / -5 EX7CQ -4 / -6 4 ✓ Full exchange observed
08-29 20:18 40m -14 / -10 PC2J -1 / - 4 ✓ Closing observed
08-29 20:02 80m -9 / -9 OK1UOZ +10 / - 5 ✓ Closing observed
08-29 19:58 80m - / +3 OH/SM5MRW -11 / - 4 ✓ Closing fragment
08-29 19:58 80m - / -11 RU3DNN +13 / - 3 ✓ Closing fragment
08-29 19:40 160m - / -11 R3DPH 0 / - 2 Partial capture
08-29 19:37 160m - / -20 R3DPH -4 / - 2 Partial capture
08-29 18:36 160m - / -19 SM5KNV -8 / - 2 ✓ Closing fragment
08-22 07:56 40m - / -10 UT4PA +4 / - 4 ✓ Closing fragment
08-22 07:51 40m - / - UT4PA +4 / - 2 Partial capture
08-22 07:50 40m - / - F1HFP -10 / - 4 Partial capture
08-22 07:45 40m - / -18 F4LNM -9 / - 5 Partial capture
08-22 07:45 40m - / - PA2RO -14 / - 5 Partial capture
08-21 20:15 20m -10 / - C91RU - / -11 3 ✓ Closing fragment
08-15 20:36 80m -21 / - MM0DHQ -17 / -9 3 ✓ Closing observed
08-15 20:29 80m -12 / -18 SP5DFK/QRP -4 / -13 5 Partial capture
08-15 20:25 80m - / -8 SM6MUY +13 / - 2 ✓ Closing fragment
08-15 20:07 80m -10 / - 8S2DX - / -11 3 ✓ Closing fragment
08-15 19:59 80m -4 / -11 HA3GO +1 / -5 6 ✓ Full exchange observed
08-15 19:56 80m -8 / +4 DL1EDR +2 / -13 7 Partial capture

Recent FT8 messages decoded at SO8OO

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

10m 
UTC    dB Audio  Message
102915  -8 1122  SA4JAJ EA5JXJ IM98 (x2)
160m 
UTC    dB Audio  Message
211545 -12 1570  SA4JAJ LA9JKA JP32
211600 -23 1644  LA9JKA SA4JAJ +19 (x2)
211915 -16 1569  SA4JAJ LA9JKA JP32
211930 -22 1644  LA9JKA SA4JAJ +17 (x2)
212400 -21 1645  LZ7VV SA4JAJ JO79 (x4)
212545 -14 1571  SA4JAJ LA9JKA JP32 (x2)
215030 -15 1201  LZ7VV SA4JAJ JO79 (x3)
40m 
UTC    dB Audio  Message
201815  -2 1602  SA4JAJ PC2J JO22 (x2)
201900 -14 1601  PC2J SA4JAJ RRR
201915  +0 1602  SA4JAJ PC2J 73
201945  -1 2181  SA4JAJ DK0RE JO41
192130  -4 1338  SA4JAJ EX7CQ -05
192145 -19 1341  EX7CQ SA4JAJ R-06
192200  -3 1338  SA4JAJ EX7CQ RR73
192215 -18 1341  EX7CQ SA4JAJ 73
184215 -22 1869  SV9QWC SA4JAJ JO79
192945  -8 2042  CN8NS SA4JAJ JO79
092645 -12 1608  SA4JAJ SP1LJZ JO84 (x3)
200515 -24 1246  BG0HP SA4JAJ JO79
80m 
UTC    dB Audio  Message
195845 +14  569  SA4JAJ RU3DNN R-11
195845  -9 1943  <SA4JAJ> OH/SM5MRW
195915 +11  569  SA4JAJ RU3DNN 73
195915 -14 1942  <SA4JAJ> OH/SM5MRW (x3)
200215  +8 1168  SA4JAJ OK1UOZ JO70 (x2)
200245 -12  564  SA4JAJ DF4FS JN48
200315  +9 1168  SA4JAJ OK1UOZ R-09
200330  -9 1170  OK1UOZ SA4JAJ RRR
200345 +10 1168  SA4JAJ OK1UOZ 73
200445 -11 2540  SA4JAJ PE0TS JO32
200630 -10 1170  CQ SA4JAJ JO79
200715  -6 2540  SA4JAJ PE0TS JO32
20m 
UTC    dB Audio  Message
201545  -9  366  C91RU SA4JAJ JO79 (x4)

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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