YB7WW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Indonesia Most frequent locator attributed to this token: OI89

Receiver-side FT8 activity involving YB7WW, decoded by SO8OO in southeastern Poland. 64 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-06-10.

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 64 FT8 messages attributed to YB7WW as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (95%), followed by 20 m (5%). In this small sample, the estimated median decoder S/N was -13 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

20m · 3 10m · 61

First attributed message: 2026-06-06
Last attributed message: 2026-06-10 13:10 UTC

Observed FT8 message patterns

Attributed sample: 64 messages
Active dates: 2 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -22 to -6 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 24, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 17.

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).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with YB7WW in decoded directed-looking exchanges:

DB7GE · Fed. Rep. of Germany DC8RA · Fed. Rep. of Germany F6GCP · France F8NHF · France IK6DLK · Italy M0BEW · England OZ1BUR · Denmark PD0HLA · Netherlands R6LE · European Russia RT6DU · European Russia RV6AVU · European Russia AJ9C · United States

Most frequent locator attributed to YB7WW

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: OI89 · 16 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 10,423 km (approx.)
Last such locator decoded: 2026-06-10 13:10 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 UTC	Band	YB7WW S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-26 12:47	20m	- / -	OH5NBJ	+4 / -	7	Partial capture
08-11 12:47	20m	- / -	DL1R	-5 / -	3	Partial capture
08-11 12:47	20m	- / -10	RW3QW	-6 / -	2	✓ Closing fragment
08-11 12:38	20m	- / -	9A3K	+3 / -	2	Partial capture
08-04 13:06	20m	- / -	UT5UAE	-10 / -	8	Partial capture
07-22 13:41	20m	- / -	RK4CH	-6 / -	4	Partial capture
07-17 12:51	10m	- / -13	DC8RA	+1 / -	3	✓ Closing fragment
07-17 12:46	10m	- / -	YL3AKH	-10 / -	2	Partial capture
07-13 13:58	20m	- / -	HB9CAL	0 / -	3	Partial capture
07-13 13:57	20m	- / -	HB9TIH	-17 / -	6	Partial capture
07-13 13:47	20m	- / -	IU4PUG	-15 / -	5	Partial capture
07-13 13:33	20m	- / -	OK1DBE	-8 / -	2	Partial capture
07-13 13:29	20m	- / -	DK5DW	-8 / -	2	Partial capture
07-13 13:26	20m	- / -	PD4WAC	-7 / -	5	Partial capture
07-13 13:20	20m	- / -	DL1R	+1 / -	6	Partial capture
07-13 13:17	20m	- / -	PD4WAC	-9 / -	2	Partial capture
07-13 13:02	20m	- / -17	UT4VL	-12 / -	3	Partial capture
07-11 13:03	20m	- / -	RZ4FWA	-19 / -	3	Partial capture
07-10 13:17	20m	- / -8	UA3GPM	-8 / -	2	✓ Closing fragment
07-10 12:58	20m	- / -	R2DQR	-12 / -	2	Partial capture
07-08 13:05	20m	- / -	UR4QWW	-16 / -	5	Partial capture
06-30 14:08	10m	- / -	SV1EKI	-16 / -	2	Partial capture
06-30 13:59	10m	- / -	IK6DLK	-12 / -	2	✓ Closing fragment
06-30 13:36	10m	- / -	IZ5SIH	-16 / -	3	Partial capture
06-30 11:38	10m	- / -	IT9MRM	-24 / -	4	Partial capture
06-30 11:29	10m	- / -	DL7GAL	+7 / -	4	Partial capture
06-30 11:21	10m	- / -9	F6GCP	+13 / -	3	✓ Closing fragment
06-30 11:19	10m	- / -	DN9AD	0 / -	2	Partial capture
06-30 11:19	10m	- / -	DO1CU	-3 / -	2	Partial capture
06-30 11:18	10m	- / -	DN9BLN	+1 / -	4	Partial capture
06-30 11:17	10m	- / -	DJ5BV	-13 / -	3	Partial capture
06-30 11:16	10m	- / -	DO9PV	-1 / -	8	Partial capture
06-30 11:12	10m	- / -	DO3SK	-2 / -	2	Partial capture
06-30 11:11	10m	- / -	DN9BLN	-7 / -	7	Partial capture
06-30 11:11	10m	- / -	IK6ATS	-10 / -	2	Partial capture
06-30 11:09	10m	- / -	DN9TB	-12 / -	2	Partial capture
06-30 08:51	10m	- / -	HB9CFU	-5 / -	6	Partial capture
06-30 08:51	10m	- / -15	PD0HLA	+1 / -	3	✓ Closing fragment
06-30 08:41	10m	- / -15	DB7GE	-2 / -	6	✓ Closing fragment
06-30 08:41	10m	- / -	DK0BO	0 / -	12	Partial capture
06-28 13:38	10m	- / -	DO1NUE	+13 / -	4	Partial capture
06-28 13:28	10m	- / -8	RV6AVU	-10 / -	3	✓ Closing fragment
06-27 13:56	10m	- / -14	RT6DU	-1 / -	4	✓ Closing fragment
06-27 13:39	10m	- / -	RA3ZH	-2 / -	2	Partial capture
06-27 13:23	10m	- / -7	F6EQZ	-17 / -	3	Partial capture
06-27 13:12	10m	- / -2	M0BEW	-12 / -	2	✓ Closing fragment
06-24 22:38	40m	- / -	EA5JKT	-18 / -	3	✓ Closing fragment
06-24 22:32	40m	- / -	SV1EKI	-14 / -	3	Partial capture
06-24 22:31	40m	- / +3	IU7RQC	-18 / -	2	Partial capture
06-24 22:29	40m	- / -17	IU6STP	-18 / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
123915  +2 2176  YB7WW 9A3K JN65
124715  -1  673  YB7WW RW3QW -10
124715  -4 2674  YB7WW DL1R JN58
124745 -11  674  YB7WW RW3QW RR73
124745  -6 2674  YB7WW DL1R JN58 (x2)
131000  -7  982  YB7WW RD6OZ KN98
124130 -14  409  YB7WW AJ9C RR73
124700  +6 2817  YB7WW OH5NBJ KP41 (x7)

10m

UTC    dB Audio  Message
114100 -24 1624  YB7WW IT9MRM JM77
133615 -13 1729  YB7WW IZ5SIH JN53 (x3)
135945 -12 2212  YB7WW IK6DLK JN63 (x2)
140145  -7 2700  YB7WW IQ4JO JN63
140830 -15 2258  YB7WW SV1EKI KM18 (x3)
124600 -10  672  YB7WW YL3AKH KO16 (x2)
125130  +0  672  YB7WW DC8RA JN39 (x3)

40m

UTC    dB Audio  Message
223000 -18 2113  YB7WW IU6STP R-17 (x2)
223100 -21 1718  YB7WW IU7RQC JN71
223100 -22 2114  YB7WW IU6STP R-23
223130 -14 2169  YB7WW R7OP KN98
223130 -16 1718  YB7WW IU7RQC R+03
223130 -21 2114  YB7WW IU6STP R-23
223230 -12  862  YB7WW SV1EKI KM18 (x2)
223330  +0  312  YB7WW LB7ZG JP50
223400 -16 2168  YB7WW R7OP KN98
223430 -14  862  YB7WW SV1EKI KM18
223800 -18 1477  YB7WW EA5JKT IM99 (x3)

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