EH1SDC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Spain Most frequent locator attributed to this token: IN73

Receiver-side FT8 activity involving EH1SDC, decoded by SO8OO in southeastern Poland. 662 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-09-10 and 2026-09-13.

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 662 FT8 messages attributed to EH1SDC as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (53%), followed by 60 m (37%) and 80 m (11%). Most decodes (75%) fell within the six-hour window 20:00-02:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (65%); the estimated median was -11 dB.

Overview

662
Messages attributed
4
UTC dates decoded
50
Active 15-min windows
-11 dB
Estimated median S/N

Bands

80m · 70 60m · 243 40m · 348 20m · 1
First attributed message: 2026-09-10
Last attributed message: 2026-09-13 22:06 UTC

Observed FT8 message patterns

Attributed sample
662 messages
Active dates
4 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-16 to -6 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 74, moderate (-15 to -9 dB) 429, strong (≥ -8 dB) 159.

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 EH1SDC 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 EH1SDC

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
IN73 · 357 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
2,150 km (approx.)
Last such locator decoded
2026-09-13 22:05 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 UTCBandEH1SDC S/NCounterpartCounterpart S/NMsgsCapture
09-13 22:05 60m -16 / - F4NEM/P -17 / -3 3 ✓ Closing observed
09-13 22:04 60m - / - DL9KM -22 / - 2 Partial capture
09-13 22:01 60m -10 / - DL7UKM - / -1 2 Partial capture
09-13 21:57 60m -13 / -1 F5RRS -1 / - 5 ✓ Full exchange observed
09-13 21:54 60m -13 / -2 PA4B -3 / -3 4 ✓ Full exchange observed
09-13 21:52 60m -12 / - SA5DCE -19 / -25 4 ✓ Closing observed
09-13 21:52 60m -11 / +4 EA1DFP -11 / - 3 ✓ Full exchange observed
09-13 21:46 60m -13 / -4 DG8CA -23 / -11 2 Partial capture
09-13 21:45 60m -12 / - DL3YAZ -10 / -14 4 ✓ Closing observed
09-13 21:44 60m -10 / - EA3JL -10 / - 4 ✓ Closing observed
09-13 21:43 60m -10 / -18 UR9QQ -14 / -17 9 ✓ Full exchange observed
09-13 21:41 60m -13 / -3 DK0NZ -1 / -2 4 ✓ Full exchange observed
09-13 21:40 60m -14 / -7 PA1ZT -11 / -14 5 ✓ Full exchange observed
09-13 21:39 60m -12 / - GM4AUP - / -14 2 ✓ Closing fragment
09-13 21:37 60m -12 / - SP5MIG - / -3 2 ✓ Closing fragment
09-13 21:34 60m -10 / - SP2EUI - / -6 2 ✓ Closing fragment
09-13 21:32 60m -14 / - M0PEL -3 / - 3 ✓ Closing observed
09-13 21:31 60m -18 / -10 DG6VC -8 / - 3 ✓ Closing observed
09-13 21:30 60m -14 / - SP9TBT - / -7 2 ✓ Closing fragment
09-13 21:28 60m -12 / -3 9H1FL -19 / -10 4 ✓ Full exchange observed
09-13 21:26 60m -16 / +7 EC3A -21 / - 2 Partial capture
09-13 21:26 60m - / -9 F1IQH -8 / - 3 Partial capture
09-13 19:52 60m - / - EA1FJV -21 / - 2 Partial capture
09-13 18:14 40m - / - LX1JH -1 / - 3 ✓ Closing fragment
09-13 18:10 40m - / -13 DK0NZ -3 / - 6 Partial capture
09-13 05:37 40m -15 / - F3CJ -16 / -17 2 Partial capture
09-13 05:27 40m -14 / - DL9YNG -2 / -10 2 ✓ Closing observed
09-13 05:23 40m -13 / - ON8PR -1 / -6 4 ✓ Closing observed
09-13 04:50 40m -8 / - KC2ZZR - / -16 2 Partial capture
09-13 04:33 40m - / -14 R2PX 0 / - 2 Partial capture
09-13 04:14 40m - / -16 OH3OJ -4 / - 2 ✓ Closing fragment
09-13 03:58 40m -8 / - LY2J - / +1 2 ✓ Closing fragment
09-13 03:37 40m -10 / - KF0WWR - / -14 3 ✓ Closing fragment
09-13 03:31 40m -6 / - AA9JS - / -8 2 ✓ Closing fragment
09-13 03:25 40m -11 / - K4OJF - / -12 2 ✓ Closing fragment
09-13 03:23 40m -10 / - N0MLZ - / -10 2 ✓ Closing fragment
09-13 03:10 40m -8 / - N0KWA - / -15 2 Partial capture
09-13 03:07 40m -9 / - HI3QMT -14 / -6 2 ✓ Closing observed
09-13 03:06 40m -8 / -16 WB2RRF -12 / 0 2 Partial capture
09-13 02:59 40m -11 / - YV4PPC - / -6 2 ✓ Closing fragment
09-13 02:57 40m -12 / - N3FMC - / -15 2 Partial capture
09-13 02:36 40m -14 / - N8SNO - / -10 2 Partial capture
09-13 02:19 40m -8 / - KX4DRT - / +1 2 ✓ Closing fragment
09-13 02:17 40m -8 / - YV3CFP - / -2 2 ✓ Closing fragment
09-13 02:03 40m -8 / - N4HFE - / -11 2 ✓ Closing fragment
09-13 02:00 40m -8 / - RD4HX - / -15 2 ✓ Closing fragment
09-13 01:55 40m -14 / - KF7XC - / -10 2 ✓ Closing fragment
09-13 01:53 40m -9 / -8 HI8JCD -14 / +4 3 ✓ Full exchange observed
09-13 01:47 40m -10 / - RN3ZBX - / -15 2 Partial capture
09-13 01:42 40m -12 / - R4RZ - / -17 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

60m 
UTC    dB Audio  Message
220100 -11 1093  DL7UKM EH1SDC -01 (x2)
220200 -13 1092  CQ EH1SDC IN73 (x5)
220415 -21 1799  EH1SDC DL9KM JN68
220430 -14 1092  CQ EH1SDC IN73 (x2)
220515 -17 1730  EH1SDC F4NEM/P JN19
220530 -17 1092  F4NEM/P EH1SDC -03
220545 -24 1799  EH1SDC DL9KM JN68
220600 -14 1093  F4NEM/P EH1SDC RR73
220815 -19 1730  EH1SDC F4NEM/P 73
20m 
UTC    dB Audio  Message
190430 -14  884  Z34BET EH1SDC -12
80m 
UTC    dB Audio  Message
230815  -8 1103  EH1SDC TF3VS R-04
230815 -13 1988  EH1SDC OE2AGZ JN67
230845  -8 1103  EH1SDC TF3VS 73
230845 -11 1988  EH1SDC OE2AGZ JN67 (x5)
231100 -24 1033  OE2AGZ EH1SDC RR73
231115 -11 1988  EH1SDC OE2AGZ 73
231130 -24 1033  CQ EH1SDC IN73
183645 -10  645  EH1SDC DL7ET 73
183730 -16  899  EA4CQX EH1SDC -06
184000 -15  900  CQ EH1SDC IN73 (x2)
40m 
UTC    dB Audio  Message
060745 -15  737  EH1SDC F3CJ 73
180900  -6  930  EH1SDC DG3DAF JO41
181015 -11 1771  EH1SDC EB1TR 73
181015  -1  929  EH1SDC DK0NZ JO63
181030 -14  929  CQ EH1SDC IN73                        a1
181045  -3  930  EH1SDC DK0NZ JO63
181100 -12  930  CT1FOE EH1SDC +12
181115  -5  930  EH1SDC DK0NZ JO63 (x4)
181445  -2  929  EH1SDC LX1JH JN39 (x3)
181745  -6  929  EH1SDC DL3JHK JO62

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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