7Z1DM — 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: Saudi Arabia Most frequent locator attributed to this token: LL46

Receiver-side FT8 activity involving 7Z1DM, decoded by SO8OO in southeastern Poland. 486 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 23 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-09-06.

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 486 FT8 messages attributed to 7Z1DM as the transmitting token by decoded message structure across 23 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (95%), followed by 40 m (5%). Most decodes (90%) fell within the six-hour window 22:00-04:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

486
Messages attributed
23
UTC dates decoded
83
Active 15-min windows
-12 dB
Estimated median S/N

Bands

40m · 23 20m · 463
First attributed message: 2026-06-09
Last attributed message: 2026-09-06 02:23 UTC

Observed FT8 message patterns

Attributed sample
486 messages
Active dates
23 UTC dates
Estimated median S/N
-12 dB
Estimated 10th-90th percentile
-21 to -1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 156, moderate (-15 to -9 dB) 158, strong (≥ -8 dB) 172.

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 7Z1DM 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 7Z1DM

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
LL46 · 87 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
3,489 km (approx.)
Last such locator decoded
2026-09-01 02:10 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 UTCBand7Z1DM S/NCounterpartCounterpart S/NMsgsCapture
10-18 00:32 40m - / - RD3FY -11 / - 3 Partial capture
10-18 00:32 40m - / - RZ4FWA -16 / - 3 Partial capture
09-09 17:47 20m - / - ON6AA -18 / - 3 ✓ Closing fragment
09-06 20:24 40m - / - CT7BHW -3 / - 4 Partial capture
09-06 20:24 40m - / - RA6OY +6 / - 6 Partial capture
09-06 02:28 80m - / -19 9A2AJ +9 / - 2 ✓ Closing fragment
09-06 01:28 40m - / -18 CT7AUT -15 / - 5 ✓ Closing fragment
09-06 01:23 40m -18 / - LA4O -5 / - 7 ✓ Closing observed
09-05 01:34 40m - / -13 RC9WC -12 / - 2 ✓ Closing fragment
09-01 02:12 40m -23 / - PT7YV - / -14 2 Partial capture
09-01 02:10 40m -18 / -21 UA4FKT +6 / -12 4 Partial capture
09-01 02:08 40m -12 / -7 IZ8EYN -3 / - 4 ✓ Closing observed
09-01 02:07 40m -15 / - RX7T -10 / -11 3 ✓ Closing observed
08-31 05:12 20m -16 / - 8S2C - / -18 2 ✓ Closing fragment
08-31 05:09 20m - / - EP2AES -10 / - 3 Partial capture
08-31 04:43 20m -9 / - A61OK - / -22 3 ✓ Closing fragment
08-31 04:39 20m - / - RV6F 0 / - 7 Partial capture
08-31 04:37 20m -2 / -3 TA2CAX +1 / -16 5 ✓ Full exchange observed
08-30 23:43 20m -18 / - JE1AZZ - / -16 2 ✓ Closing fragment
08-30 23:42 20m -17 / - BH8AVW - / -16 2 ✓ Closing fragment
08-30 23:40 20m -23 / - 5N0YEN - / -17 2 Partial capture
08-30 23:20 20m -13 / - DV4ZAR - / -11 3 Partial capture
08-30 23:01 40m -22 / -18 EA9ABC -13 / -8 7 ✓ Full exchange observed
08-30 22:58 40m -24 / -15 S59YL -15 / -12 4 ✓ Full exchange observed
08-30 22:57 40m - / -13 LZ1GC -18 / - 3 ✓ Closing fragment
08-30 22:53 40m - / - UX1VT -21 / - 2 ✓ Closing fragment
08-30 22:19 20m -11 / - WB5XX - / -16 3 Partial capture
08-30 22:10 20m -6 / - TJ1GD - / -17 3 Partial capture
08-28 17:17 20m -6 / - RZ3Z/P - / -16 2 Partial capture
08-28 15:33 20m -8 / - BA3QIQ - / -16 2 ✓ Closing fragment
08-27 23:21 20m -9 / -16 WA8EFK -20 / -13 6 ✓ Full exchange observed
08-27 23:19 20m -3 / -21 AB1HL -9 / - 4 ✓ Closing observed
08-27 23:17 20m +3 / -18 KE8UOH -12 / -15 8 ✓ Full exchange observed
08-27 23:11 20m +2 / -13 KR4IJC -11 / -11 9 ✓ Full exchange observed
08-27 23:10 20m 0 / -15 K1CXS -2 / -9 4 ✓ Full exchange observed
08-27 23:08 20m -10 / - KD4CM - / -8 2 Partial capture
08-27 23:07 20m -9 / -16 W4GD -16 / -12 8 ✓ Full exchange observed
08-27 23:06 20m -4 / - N2NDV - / -21 2 Partial capture
08-27 23:05 20m -7 / - KD4CM - / -15 2 Partial capture
08-27 23:03 20m -10 / - W1WCI - / -13 3 Partial capture
08-27 23:01 20m -2 / - WA6DKZ - / -18 4 Partial capture
08-27 23:00 20m -9 / - N2NDV - / -15 2 Partial capture
08-27 22:59 20m 0 / - KB3VNG - / -11 2 Partial capture
08-27 22:57 20m -9 / - NP4VO - / -16 3 Partial capture
08-27 22:52 20m -9 / - KE8UOH - / -18 6 Partial capture
08-27 22:43 20m 0 / - FG4AO - / -16 2 Partial capture
08-27 22:39 20m +8 / - N1HO -2 / -14 5 ✓ Closing observed
08-27 22:37 20m +6 / -21 K4DND 0 / -18 9 ✓ Full exchange observed
08-27 22:32 20m - / - BH4ECL -10 / - 4 Partial capture
08-27 22:31 20m - / -15 N1FMB -7 / - 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
202445  -2 2932  7Z1DM CT7BHW IN51
202515  +4  242  7Z1DM RA6OY KN88
202515  -4 2932  7Z1DM CT7BHW IN51
202545  +4  242  7Z1DM RA6OY KN88
202545  +0 2932  7Z1DM CT7BHW IN51
202615  +5  242  7Z1DM RA6OY KN88
202615  -7 2931  7Z1DM CT7BHW IN51
202645  +7  242  7Z1DM RA6OY KN88
175400  +7 1868  7Z1DM DL8NW JO30
003230 -10 1773  7Z1DM RZ4FWA LO23
003230 -10  274  7Z1DM RD3FY KO85
003300 -16 1773  7Z1DM RZ4FWA LO23
003300 -11  274  7Z1DM RD3FY KO85
003330 -21 1772  7Z1DM RZ4FWA LO23
003400 -13  274  7Z1DM RD3FY KO85
20m 
UTC    dB Audio  Message
044200  +0 1466  7Z1DM RV6F LN14 (x2)
044300  -4  432  A61OK 7Z1DM -22 (x3)
050900 -14 1863  CQ 7Z1DM LL46
050915 -11 2104  7Z1DM EP2AES LM55 (x2)
051015 -14 1215  ZL2BX 7Z1DM -19
051015  -4 2104  7Z1DM EP2AES LM55
051245 -16 1613  8S2C 7Z1DM -18 (x2)
174730 -19 1109  7Z1DM ON6AA JO11 (x3)
80m 
UTC    dB Audio  Message
022830 +13 2721  7Z1DM 9A2AJ R-19 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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