BA4II — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: China Most frequent locator attributed to this token: OM86

Receiver-side FT8 activity involving BA4II, decoded by SO8OO in southeastern Poland. 46 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-08-12 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 46 FT8 messages attributed to BA4II as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (61%), followed by 20 m (28%) and 80 m (11%). Most decodes (96%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (70%); the estimated median was -13 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

80m · 5 40m · 28 20m · 13

First attributed message: 2026-08-12
Last attributed message: 2026-09-07 22:04 UTC

Observed FT8 message patterns

Attributed sample: 46 messages
Active dates: 6 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -17 to -9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 32, strong (≥ -8 dB) 3.

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 BA4II in decoded directed-looking exchanges:

R3EDX · European Russia ×3 YO3FRI · Romania ×2 ON4IQ · Belgium ×2 ON4ASV · Belgium ×2 JA1EMQ · Japan RA9MI · Asiatic Russia EA3EQS · Spain RA4PIS · European Russia SV1FJR · Greece PY4PDO · Brazil YT7DX · Serbia RW3QW · European Russia

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 BA4II

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: OM86 · 31 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,328 km (approx.)
Last such locator decoded: 2026-09-07 22:04 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	BA4II S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-11 20:16	40m	- / -	F5PBG	-4 / -	4	Partial capture
09-10 17:12	40m	- / -	DL6NDN	+2 / -	4	Partial capture
09-10 17:12	40m	- / -	PD0PY	-16 / -	2	Partial capture
09-10 17:09	40m	- / -14	PA5VL	-8 / -	12	Partial capture
09-07 21:58	40m	-11 / -	Z86GQD	- / -	11	Partial capture
09-07 21:56	40m	-12 / -	E78W	- / -	2	Partial capture
09-07 21:45	40m	-10 / -	RA4FUT	-2 / -	2	✓ Closing observed
09-07 21:44	40m	- / 0	IK4ANJ	-10 / -	2	Partial capture
09-07 21:41	40m	- / -	PI4TX	-11 / -	4	Partial capture
09-07 21:41	40m	-12 / -	SP7TF	- / -9	2	✓ Closing fragment
09-07 21:40	40m	-14 / -16	LZ4VR	-5 / -12	7	✓ Full exchange observed
09-07 21:40	40m	- / 0	DK7ZT	-1 / -	4	Partial capture
09-07 21:39	40m	- / -	UR4QWW	-3 / -	5	Partial capture
09-07 21:38	40m	- / -6	SP5LST	-17 / -	3	✓ Closing fragment
09-07 21:36	40m	- / -7	DM2SP	+2 / -	4	✓ Closing fragment
09-07 21:36	40m	- / -9	EA8UP	+3 / -	2	✓ Closing fragment
09-07 21:35	40m	- / -	RL3K	0 / -	2	Partial capture
09-07 21:30	40m	- / -20	EA1CQ	+1 / -	2	Partial capture
09-07 21:28	40m	- / -14	YO3FRI	+8 / -	3	✓ Closing fragment
09-07 21:24	40m	- / -15	SN40KZE	+17 / -	3	Partial capture
09-07 21:23	40m	- / -16	EA1CQ	0 / -	2	Partial capture
09-07 21:21	40m	-16 / -17	HB9EBM	+15 / -15	6	✓ Full exchange observed
09-07 21:19	40m	-14 / -	D2ACE	- / -	2	Partial capture
09-07 21:12	40m	- / -15	TA7ARH	+5 / -	3	✓ Closing fragment
09-07 21:11	40m	- / -17	EW8DU	+6 / -	2	Partial capture
09-07 21:08	40m	- / -2	TA2EE	-22 / -	3	Partial capture
09-07 20:23	40m	- / -17	GJ0KYZ	+6 / -	3	✓ Closing fragment
09-05 17:48	40m	- / -16	TA7DX	-2 / -	2	Partial capture
09-05 17:47	40m	- / -20	OE3KLU	+16 / -	2	Partial capture
09-05 17:45	40m	- / -9	RO3Z	+6 / -	2	✓ Closing fragment
09-05 17:08	40m	- / -	OK1UG	+15 / -	11	Partial capture
08-30 22:55	40m	- / -18	R2AL	+17 / -	5	Partial capture
08-30 22:53	40m	- / -7	RA0AF	-6 / -	4	✓ Closing fragment
08-30 22:50	40m	- / -	R2AL	+16 / -	3	Partial capture
08-30 22:40	40m	- / -	SV1MOZ	-18 / -	3	Partial capture
08-30 22:27	40m	- / -18	G4IFX	0 / -	2	✓ Closing fragment
08-30 22:09	40m	- / -12	RA6AR	-13 / -	3	Partial capture
08-30 22:01	40m	- / -20	RA6ZC	-1 / -	3	Partial capture
08-30 21:59	40m	- / -	PC2J	+2 / -	2	Partial capture
08-30 21:42	40m	- / -16	EA3NG	-6 / -	2	✓ Closing fragment
08-30 21:10	40m	- / -20	R3XBS	-7 / -	3	✓ Closing fragment
08-30 20:10	40m	- / -12	SP1G	+12 / -	2	Partial capture
08-30 20:03	40m	- / -	SP1G	+21 / -	2	Partial capture
08-30 19:51	40m	- / -2	RM3DA	+3 / -	5	✓ Closing fragment
08-30 19:33	40m	- / -10	RC9WC	-16 / -	2	Partial capture
08-30 19:33	40m	- / -17	LX9UN	+3 / -	9	Partial capture
08-30 19:22	40m	- / -16	F5SPJ	-7 / -	6	Partial capture
08-30 19:20	40m	- / -20	EA2AA	+2 / -	13	✓ Closing fragment
08-30 19:19	40m	- / -16	F5SPJ	-10 / -	2	Partial capture
08-30 18:55	40m	- / -	IK4RVY	-2 / -	9	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
171245  -3 1796  BA4II DL6NDN JO50
171245 -11 1434  BA4II PA5VL -14
171315 -19  835  BA4II PD0PY JO22
171315  +3 1795  BA4II DL6NDN JO50
171315  +0 1434  BA4II PA5VL -14
171345  +3 1795  BA4II DL6NDN JO50
171345  -1 1434  BA4II PA5VL -14
171415  +3 1795  BA4II DL6NDN JO50
171415  +1 1434  BA4II PA5VL -14 (x3)
201645  -6 1138  BA4II F5PBG IN78 (x4)

20m

UTC    dB Audio  Message
183030  +5 1802  BA4II MM0GTU RR73
183300 -11 2582  BA4II MI0JZZ -18 (x2)
162215  +6  638  BA4II F5IXN JN23 (x4)
163415 -19  639  ZS6OB BA4II OM86
134145  -6 2117  BA4II UA7T -22 (x3)
135445 -23 2199  BA4II VU2ORO -15
141745  -8 1928  BA4II RU9AD -08 (x2)
142100 -14 2250  BA4II R9LM -16

80m

UTC    dB Audio  Message
185945 -13  550  YL2NX BA4II RRR (x3)
190115  -9  550  BH4GWF BA4II +07 (x2)
230130  +6 2417  BA4II 9A4ZM JN86 (x3)
170230  +0 2597  BA4II DL1JHR JO60 (x5)

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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