YC9BFL — 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: Indonesia Most frequent locator attributed to this token: OI71

Receiver-side FT8 activity involving YC9BFL, decoded by SO8OO in southeastern Poland. 85 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-23.

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 85 FT8 messages attributed to YC9BFL as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (75%), followed by 20 m (25%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (73%); the estimated median was -18 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-18 dB

Estimated median S/N

Bands

20m · 21 10m · 64

First attributed message: 2026-06-06
Last attributed message: 2026-09-23 11:42 UTC

Observed FT8 message patterns

Attributed sample: 85 messages
Active dates: 10 UTC dates
Estimated median S/N: -18 dB
Estimated 10th-90th percentile: -23 to -13 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 62, moderate (-15 to -9 dB) 23, 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 YC9BFL in decoded directed-looking exchanges:

F5GPE · France ×2 CN8WK · Morocco DL2NYC · Fed. Rep. of Germany DM2WG · Fed. Rep. of Germany EA7GHD · Spain EA7GXD · Spain HZ1KS · Saudi Arabia

Most frequent locator attributed to YC9BFL

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: OI71 · 11 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 10,959 km (approx.)
Last such locator decoded: 2026-06-16 14:53 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	YC9BFL S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-23 10:39	10m	- / -	4X5CG	-12 / -	2	Partial capture
09-23 12:28	10m	- / -5	CN8WK	+8 / -	2	✓ Closing fragment
09-23 11:36	10m	-24 / -	MM0GOR	- / -6	2	Partial capture
09-20 12:32	10m	- / -12	EA7GHD	-21 / -	2	✓ Closing fragment
09-20 12:26	10m	- / -14	EA7GXD	-4 / -	3	✓ Closing fragment
08-21 12:13	10m	- / -19	PD4WAC	-19 / -	4	Partial capture
08-21 12:09	10m	- / -19	PD4WAC	-17 / -	3	Partial capture
08-21 12:09	10m	- / -5	F5GPE	-11 / -	9	✓ Closing fragment
08-18 12:27	10m	- / -9	DM2WG	-14 / -	3	✓ Closing fragment
08-18 12:18	10m	- / -11	DL2NYC	-17 / -	2	✓ Closing fragment
08-17 12:24	10m	- / -12	UA3QQG	-17 / -	3	Partial capture
08-17 12:21	10m	- / -8	UY2LA	-17 / -	3	Partial capture
07-30 11:36	10m	- / 0	F8AEJ	-18 / -	3	Partial capture
07-30 11:32	10m	- / -	F8AEJ	-20 / -	3	Partial capture
07-30 11:23	10m	- / -15	F5GPE	-19 / -	4	✓ Closing fragment
07-27 12:06	10m	- / -12	HZ1KS	-15 / -	2	✓ Closing fragment
07-26 09:13	10m	- / -	F5GPE	-19 / -	3	Partial capture
07-26 09:09	10m	- / -19	F1PBZ	-2 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
121415 -20 1658  YC9BFL PD4WAC R-19 (x2)
122600  -6  669  YC9BFL EA7GXD IM76 (x3)
123215 -21 1477  YC9BFL EA7GHD R-12 (x2)
113445 -22 1665  DG1FK YC9BFL -04
113645 -23 1656  MM0GOR YC9BFL -06 (x2)
114200 -22 1642  R3FE YC9BFL -22
122845  +9 2557  YC9BFL CN8WK R-05 (x2)
103945 -13 1188  YC9BFL 4X5CG KM71 (x2)

CW

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

Explore CW reception at SO8OO

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