CS7BDU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Portugal Most frequent locator attributed to this token: IM58

Receiver-side FT8 activity involving CS7BDU, decoded by SO8OO in southeastern Poland. 37 FT8 messages attributed to this token as transmitter, on 10m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-20 and 2026-08-02.

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 37 FT8 messages attributed to CS7BDU as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (100%). Several six-hour UTC windows tied for the largest share (95%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (92%); the estimated median was -21 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-21 dB

Estimated median S/N

Bands

10m · 37

First attributed message: 2026-06-20
Last attributed message: 2026-08-02 21:13 UTC

Observed FT8 message patterns

Attributed sample: 37 messages
Active dates: 3 UTC dates
Estimated median S/N: -21 dB
Estimated 10th-90th percentile: -24 to -16 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 34, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 0.

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 CS7BDU in decoded directed-looking exchanges:

5P1OT · Denmark 7Q3WS · Malawi CR7BRV · Portugal DG5TF · Fed. Rep. of Germany DN9BT · Fed. Rep. of Germany EA3AKY · Spain F1DSZ · France IK4UXA · Italy IU3UJE · Italy KB9MCM · United States LA6YEA · Norway N8OQ · United States

Most frequent locator attributed to CS7BDU

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: IM58 · 25 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,737 km (approx.)
Last such locator decoded: 2026-08-02 21:02 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 UTC	Band	CS7BDU S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-23 18:28	10m	- / -13	RT6Z	+4 / -	3	Partial capture
08-22 18:12	10m	- / -15	IK4UXA	-17 / -	4	✓ Closing fragment
08-02 21:12	10m	-22 / -	KB9MCM	- / +1	3	✓ Closing fragment
08-02 21:10	10m	-24 / -	5P1OT	- / -16	2	✓ Closing fragment
08-02 21:02	10m	-22 / -	PS8ARP	- / -15	2	Partial capture
08-02 20:53	10m	-23 / -	GW8DX	- / -	3	Partial capture
08-02 20:51	10m	-19 / -	LA6YEA	- / -6	3	✓ Closing fragment
08-02 20:49	10m	-19 / -	CR7BOV	- / -	5	Partial capture
08-02 20:46	10m	-18 / -	KY4UI	- / -	6	Partial capture
07-11 18:22	10m	- / -15	DN9BT	-13 / -	2	✓ Closing fragment
07-11 17:23	10m	- / -16	DG5TF	-2 / -	2	✓ Closing fragment
06-30 19:46	10m	- / -7	SX0W	-5 / -	3	✓ Closing fragment
06-30 16:54	10m	- / -	F4DUZ	-4 / -	2	Partial capture
06-30 15:38	10m	- / -15	UA6BGM	-4 / -	2	✓ Closing fragment
06-29 19:33	10m	- / -14	UA6YW	-8 / -	2	✓ Closing fragment
06-27 22:48	10m	- / -15	EA3AKY	-5 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
210215 -21 1878  PS8ARP CS7BDU IM58 (x2)
210745 -24 1877  EC5K CS7BDU R-14
211000 -24 1878  5P1OT CS7BDU R-16 (x2)
211230 -22 1878  KB9MCM CS7BDU R+01 (x3)
181215 -19 2202  CS7BDU IK4UXA -15 (x4)
182845  +3 2881  CS7BDU RT6Z -13 (x3)

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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee