YB1AM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Indonesia Most frequent locator attributed to this token: OI33

Receiver-side FT8 activity involving YB1AM, decoded by SO8OO in southeastern Poland. 55 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-08-28.

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 55 FT8 messages attributed to YB1AM as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (64%), followed by 10 m (36%). Several six-hour UTC windows tied for the largest share (55%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

20m · 35 10m · 20

First attributed message: 2026-06-09
Last attributed message: 2026-08-28 12:54 UTC

Observed FT8 message patterns

Attributed sample: 55 messages
Active dates: 4 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -18 to -3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 20, strong (≥ -8 dB) 29.

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 YB1AM in decoded directed-looking exchanges:

9A5E · Croatia BG7JOU · China E77FN · Bosnia-Herzegovina ON5TTT · Belgium R0AX · Asiatic Russia RI1FJL · Franz Josef Land SM7HZK · Sweden

Most frequent locator attributed to YB1AM

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: OI33 · 15 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 10,219 km (approx.)
Last such locator decoded: 2026-08-28 12:54 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	YB1AM S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 16:51	40m	- / -12	R3TH	-8 / -	2	Partial capture
09-21 16:51	40m	- / -	UT9NA	+6 / -	2	Partial capture
09-21 16:47	40m	- / -11	R3TH	-7 / -	3	Partial capture
09-20 15:24	80m	- / -	OH3MMF	+6 / -	3	Partial capture
09-20 15:19	80m	- / -	UX1AA	-4 / -	11	Partial capture
09-20 15:05	80m	- / -	RY3K	+3 / -	2	Partial capture
09-20 15:05	80m	- / -	UX1AA	-3 / -	11	Partial capture
09-16 22:44	80m	- / -	EA2DYB	-9 / -	2	Partial capture
09-04 20:13	40m	- / -	LB7ZG	+8 / -	3	Partial capture
08-28 12:52	20m	-9 / -	RI1FJL	- / -	3	Partial capture
08-28 10:29	10m	- / -	F5HRH	-10 / -	2	Partial capture
08-26 13:30	20m	- / -	PD5WA	-8 / -	2	Partial capture
08-26 13:28	20m	-11 / -	BG7JOU	- / -11	3	✓ Closing fragment
08-26 13:25	20m	-10 / -	RI1FJL	- / -6	4	✓ Closing fragment
07-28 22:45	20m	- / -5	9A5E	-12 / -	2	✓ Closing fragment
07-19 14:01	20m	- / -15	E77FN	-9 / -	3	✓ Closing fragment
06-27 15:23	20m	- / -7	SM7HZK	-20 / -	2	✓ Closing fragment
06-27 15:06	20m	- / -15	ON5TTT	-13 / -	4	✓ Closing fragment
06-26 14:15	20m	- / -	DL6KIX	-16 / -	2	Partial capture
06-23 13:28	20m	- / -	F4LNM	-19 / -	6	Partial capture
06-23 13:28	20m	- / +4	R4HJY	-18 / -	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
201330  +9 2974  YB1AM LB7ZG JP50 (x3)
164745  -8 3010  YB1AM R3TH -11 (x3)
165115  +5 2579  YB1AM UT9NA KN49
165115  -6 3010  YB1AM R3TH -12
165145  +8 2579  YB1AM UT9NA KN49
165145  -9 3010  YB1AM R3TH -12

80m

UTC    dB Audio  Message
151045  -4 2232  YB1AM UX1AA KO70 (x12)
152445  +7 2739  YB1AM OH3MMF KP21 (x3)

20m

UTC    dB Audio  Message
224600 -11 2208  YB1AM 9A5E RR73
140745 -11  927  YB1AM DG5LEO JO31
125830 -10 1103  YB1AM R6DNC KN94
132545 -14 1219  RI1FJL YB1AM OI33 (x4)
132815 -13 1219  BG7JOU YB1AM -11 (x3)
133000 -11 1551  YB1AM PD5WA JO22 (x2)
125215 -10  440  RI1FJL YB1AM OI33 (x3)

10m

UTC    dB Audio  Message
085200  -9 2667  YB1AM ON6AA JO11
102900 -11  643  YB1AM F5HRH JN23 (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.

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