YD1FRU — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving YD1FRU, decoded by SO8OO in southeastern Poland. 145 FT8 messages attributed to this token as transmitter, on 80m, 40m, 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-07.

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 145 FT8 messages attributed to YD1FRU as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (78%), followed by 40 m (21%) and 80 m (1%). Most decodes (78%) fell within the six-hour window 09:00-15:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

145

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

80m · 1 40m · 31 10m · 113

First attributed message: 2026-06-06
Last attributed message: 2026-09-07 13:24 UTC

Observed FT8 message patterns

Attributed sample: 145 messages
Active dates: 9 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -20 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 46, moderate (-15 to -9 dB) 67, strong (≥ -8 dB) 32.

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 YD1FRU in decoded directed-looking exchanges:

UI6O · European Russia ×2 TM2WWA · France ×2 CT7AUT · Portugal DL1NEO · Fed. Rep. of Germany EG5DX · Spain F4KOL · France II2WWA · Italy IK1UGX · Italy JL1JAH · Japan LZ2HY · Bulgaria R1WBW · European Russia CN8NS · Morocco

Attributed messages by UTC hour

Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.

Most frequent locator attributed to YD1FRU

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 · 68 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 10,219 km (approx.)
Last such locator decoded: 2026-09-04 22:55 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	YD1FRU S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 23:10	40m	- / -5	J38LD	-18 / -	2	✓ Closing fragment
09-07 09:17	10m	-21 / -	JL1JAH	- / -9	2	✓ Closing fragment
09-04 23:28	40m	- / -14	F4EGM	-11 / -	3	✓ Closing fragment
09-04 23:24	40m	- / -14	PD9DX	-11 / -	2	✓ Closing fragment
09-03 23:48	40m	- / -8	LZ1GC	-7 / -	2	✓ Closing fragment
09-03 23:38	40m	- / -14	TI4LAS	-13 / -	2	Partial capture
09-03 23:09	40m	-17 / -8	EG42SDC	-6 / -	2	Partial capture
09-03 23:07	40m	- / -20	LA6AFA	+1 / -	2	✓ Closing fragment
09-03 23:05	40m	-6 / -11	UI6O	+2 / -19	5	✓ Full exchange observed
09-01 23:30	40m	- / -	G1CEC	-16 / -	5	Partial capture
09-01 23:21	40m	-19 / -	SP9YGD	- / -16	2	Partial capture
09-01 23:20	40m	-19 / -18	EB4SM	-6 / -19	3	✓ Full exchange observed
09-01 23:17	40m	- / -	G1CEC	-15 / -	5	Partial capture
09-01 23:16	40m	-10 / -	LA0FA	- / -15	2	✓ Closing fragment
09-01 23:13	40m	-22 / -18	AM42SDC	-6 / -	2	Partial capture
09-01 23:12	40m	-19 / -20	UA3PY	+2 / -	5	✓ Closing observed
09-01 23:11	40m	- / -15	G7KHF	-4 / -	2	✓ Closing fragment
09-01 23:09	40m	- / -	G1CEC	-18 / -	3	Partial capture
08-27 23:25	40m	- / -11	US1VAA	+4 / -	2	✓ Closing fragment
08-27 23:21	40m	- / -20	S57TW	-7 / -	2	✓ Closing fragment
08-27 23:18	40m	-10 / -16	UW5IM	-1 / -22	4	✓ Full exchange observed
08-27 23:14	40m	-13 / -18	S57TW	+8 / -	6	Partial capture
08-27 23:13	40m	-8 / -4	EA7R	+4 / -	3	✓ Closing observed
08-27 23:11	40m	-23 / -19	CN8NS	-5 / -14	3	✓ Full exchange observed
08-27 23:08	40m	-8 / -	LB6B	- / -	2	Partial capture
08-27 23:06	40m	-18 / -	RZ1AS	-9 / -22	4	✓ Closing observed
08-27 23:02	40m	- / -14	GM4HYG	-7 / -	2	✓ Closing fragment
08-27 22:58	40m	- / -14	LB7ZG	+5 / -	4	✓ Closing fragment
08-27 14:04	40m	- / -16	R2DYC	-14 / -	2	Partial capture
08-27 09:27	10m	-14 / -	SP9JBT	- / 0	2	Partial capture
08-27 09:26	10m	-17 / -	EG5DX	- / -	2	✓ Closing fragment
08-27 09:24	10m	-18 / -	YD8VJI	- / -2	2	Partial capture
08-27 08:58	10m	- / -3	F4KOL	-1 / -	2	✓ Closing fragment
08-22 23:24	40m	-16 / -17	EA5W	-10 / -18	8	✓ Full exchange observed
08-22 23:22	40m	- / -	RD3FY	-2 / -	3	Partial capture
08-22 23:21	40m	-12 / -15	HB9HSJ	+6 / -18	4	✓ Full exchange observed
08-22 23:14	40m	- / -	DJ0MAB	-8 / -	2	Partial capture
08-22 23:13	40m	- / -10	UF1A	-10 / -	2	✓ Closing fragment
08-21 23:41	40m	- / -	CT7BHW	-14 / -	26	Partial capture
08-21 23:32	40m	- / -22	EA5OL	+4 / -	9	✓ Closing fragment
08-21 23:29	40m	- / -	EA4GHH	-18 / -	5	Partial capture
08-21 23:28	40m	- / -18	R4FBT	-12 / -	2	✓ Closing fragment
08-21 23:26	40m	- / -13	EW8AAC	-13 / -	3	Partial capture
08-21 23:25	40m	- / -10	PD2TX	-8 / -	3	✓ Closing fragment
08-21 23:22	40m	- / -	EA4GHH	-18 / -	3	Partial capture
08-21 23:21	40m	- / -15	RY3F	0 / -	2	✓ Closing fragment
08-21 23:16	40m	- / -19	R2BIU	+4 / -	3	✓ Closing fragment
08-21 23:05	40m	- / -16	RK3AW	-16 / -	2	✓ Closing fragment
08-21 23:01	40m	- / -14	EA1/DH0GSU	0 / -	3	Partial capture
08-21 23:00	40m	- / -13	R2BQM	+4 / -	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
233830 -12 1472  YD1FRU TI4LAS -14 (x2)
234815  -7  938  YD1FRU LZ1GC -08 (x2)
232415 -12 2286  YD1FRU PD9DX -14 (x2)
232815 -16  804  YD1FRU DM1MB RR73
232845 -11  805  YD1FRU F4EGM JN29 (x3)
233200 -12 1609  YD1FRU F5OYA/P -09
231015 -16 1631  YD1FRU J38LD -05 (x2)
135915 -14 1618  YD1FRU UA6LIK -16
140145 -17 2145  YD1FRU RN3TT -15

10m

UTC    dB Audio  Message
085845  -2 1174  YD1FRU F4KOL RR73
092430 -17 1173  YD8VJI YD1FRU -02 (x2)
092600 -16 1173  EG5DX YD1FRU OI33 (x2)
092730 -15 1172  SP9JBT YD1FRU OI33 (x2)
093030 -22 1173  EA1EAU YD1FRU R-23
093545 -18 1173  DL6AST YD1FRU -15
094115 -20 1172  DL0AA YD1FRU R-22
094215 -18 1173  OK1FCR YD1FRU OI33
091700 -21 1402  JL1JAH YD1FRU R-09 (x2)
114200 -23 1474  CT7AUT YD1FRU RR73
132445 -21 1400  UI6O YD1FRU 73

80m

UTC    dB Audio  Message
224145  +5 1032  YD1FRU SG5Z -14
225515 -21 1812  ZS6WAB YD1FRU OI33

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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