RA3AKU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO85

Receiver-side FT8 activity involving RA3AKU, decoded by SO8OO in southeastern Poland. 33 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-17.

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 33 FT8 messages attributed to RA3AKU as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (64%), followed by 20 m (30%) and 10 m (6%). 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 strong S/N range (73%); the estimated median was -6 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-6 dB

Estimated median S/N

Bands

40m · 21 20m · 10 10m · 2

First attributed message: 2026-06-06
Last attributed message: 2026-09-17 17:32 UTC

Observed FT8 message patterns

Attributed sample: 33 messages
Active dates: 4 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -12 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 9, strong (≥ -8 dB) 24.

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 RA3AKU in decoded directed-looking exchanges:

9M2RSI · West Malaysia EB1DJ · Spain IZ5UFW · Italy LZ1ZF · Bulgaria RZ3Z/P · European Russia 9A4ZM · Croatia DL6UM · Fed. Rep. of Germany E70SZ · Bosnia-Herzegovina PE1NAO · Netherlands R4FDD · European Russia RC6OZ · European Russia RD4HX · European Russia

Most frequent locator attributed to RA3AKU

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: KO85 · 25 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,193 km (approx.)
Last such locator decoded: 2026-09-17 17:31 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	RA3AKU S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-17 17:31	40m	-8 / -24	HZ1TT	-10 / -8	3	Partial capture
08-29 14:31	20m	- / -	M7HET	-23 / -	3	Partial capture
08-26 17:58	40m	- / -10	PE1NAO	-4 / -	2	✓ Closing fragment
08-26 17:54	40m	- / -	DL3JHK	0 / -	2	Partial capture
08-26 17:54	40m	- / -	DL9MY	+1 / -	3	Partial capture
08-26 17:52	40m	- / +4	RD4HX	-2 / -	2	✓ Closing fragment
08-26 17:48	40m	-10 / -6	E70SZ	+11 / -6	5	✓ Full exchange observed
08-26 17:43	40m	- / -15	SV7BAY	+6 / -	2	✓ Closing fragment
08-26 17:11	40m	-9 / -	UN3P	- / -	2	Partial capture
08-26 16:57	20m	- / 0	MM7IEF	-14 / -	2	Partial capture
08-26 16:55	20m	- / -	RZ3Z/P	-2 / -	3	✓ Closing fragment
08-26 16:51	20m	-1 / -	8Z1IT	- / -	2	Partial capture
08-26 16:49	20m	+2 / -	9M2RSI	- / -18	4	✓ Closing fragment
08-24 18:45	40m	- / -13	GM0SDV	-2 / -	4	Partial capture
08-24 17:19	40m	- / -	DJ0MAB	-3 / -	3	Partial capture
08-24 17:18	40m	-4 / -6	RC6OZ	-8 / -	3	✓ Closing observed
08-24 17:16	40m	- / -14	TA6MMI	-5 / -	4	✓ Closing fragment
08-24 17:10	40m	- / -23	9A4ZM	+14 / -	3	✓ Closing fragment
08-24 17:10	40m	-9 / -10	DL6UM	+6 / -	8	✓ Closing observed
08-24 17:09	40m	- / -4	OZ5AGJ	-4 / -	2	Partial capture
08-12 15:52	20m	- / -12	IZ5UFW	-4 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
174900 -13  423  E70SZ RA3AKU RR73
174915 +13  421  RA3AKU E70SZ 73
175215  -3  422  RA3AKU RD4HX R+04 (x2)
175415  -1  371  RA3AKU DL9MY JO32
175415  +1  422  RA3AKU DL3JHK JO62
175445  +0  372  RA3AKU DL9MY JO32
175445  +0  421  RA3AKU DL3JHK JO62
175515  +3  371  RA3AKU DL9MY JO32
175845  -6 1349  RA3AKU PE1NAO -10 (x2)
173030 -11  616  ZL1RPC/F RA3AKU KO85
173145  -6  535  HZ1TT RA3AKU KO85
173200 -10 1729  RA3AKU HZ1TT -24
173245  -9  534  HZ1TT RA3AKU R-08

20m

UTC    dB Audio  Message
164645  +0  591  EP2AES RA3AKU KO85
164915  -3  755  9M2RSI RA3AKU KO85 (x4)
165115  -6  634  8Z1IT RA3AKU KO85 (x2)
165500  -4  580  RA3AKU RZ3Z/P KN84 (x3)
165700 -16  580  RA3AKU MM7IEF IO75 (x2)
143100 -22 1309  RA3AKU M7HET IO91 (x3)

80m

UTC    dB Audio  Message
174915 -24 2391  RA3AKU UA3IDQ R-30

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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