CHECK — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

Receiver-side FT8 activity involving CHECK, decoded by SO8OO in southeastern Poland. 6 FT8 messages attributed to this token as transmitter, on 160m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-09 and 2026-09-20.

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 6 FT8 messages attributed to CHECK as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (67%), followed by 20 m (33%). In this small sample, the estimated median decoder S/N was -10 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-10 dB

Estimated median S/N

Bands

160m · 4 20m · 2

First attributed message: 2026-08-09
Last attributed message: 2026-09-20 16:29 UTC

Observed FT8 message patterns

Attributed sample: 6 messages
Active dates: 2 UTC dates
Estimated median S/N: -10 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 3.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

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 UTC	Band	CHECK S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 16:28	160m	-4 / -	LY4A	- / -	2	Partial capture
09-20 16:25	160m	-14 / -	LY4A	- / -	2	Partial capture
08-09 15:31	20m	+6 / -	EN35UKR	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
020800  -5  894  CHECK ALC
004900  +6 1776  CHECK GRID
060215  -3  513  CHECK NOW

80m

UTC    dB Audio  Message
065930 -18 1135  CHECK UR CLK
040845 -14  446  CHECK TIME

160m

UTC    dB Audio  Message
162545 -14 1539  LY4A CHECK TX (x4)

20m

UTC    dB Audio  Message
153145  +7  845  EN35UKR CHECK (x2)

CW

CW history is temporarily unavailable.

Explore CW reception at SO8OO

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