YO3AUM — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Romania Most frequent locator attributed to this token: KN34

Receiver-side FT8 activity involving YO3AUM, decoded by SO8OO in southeastern Poland. 181 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 15 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-11-04.

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 181 FT8 messages attributed to YO3AUM as the transmitting token by decoded message structure across 15 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (91%), followed by 40 m (9%). Most decodes (71%) fell within the six-hour window 13:00-19:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

181

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

40m · 17 20m · 164

First attributed message: 2026-06-06
Last attributed message: 2026-11-04 16:11 UTC

Observed FT8 message patterns

Attributed sample: 181 messages
Active dates: 15 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -18 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 31, moderate (-15 to -9 dB) 69, strong (≥ -8 dB) 81.

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 YO3AUM in decoded directed-looking exchanges:

4Z4DX · Israel DH5BM · Fed. Rep. of Germany TA2EE · Asiatic Turkey YO4NF · Romania 9A1CCB · Croatia DM2CNE · Fed. Rep. of Germany EX7CQ · Kyrgyzstan HA7TM · Hungary PD7BDN · Netherlands R2SN · European Russia UA4FEN · European Russia UR5VLC · Ukraine

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 YO3AUM

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: KN34 · 113 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 721 km (approx.)
Last such locator decoded: 2026-11-04 16:10 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	YO3AUM S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-04 17:14	40m	- / -13	PD7BDN	-4 / -	6	✓ Closing fragment
11-04 16:10	40m	-11 / -12	HA7TM	0 / -11	6	✓ Full exchange observed
11-04 15:45	40m	- / -13	HA7TM	0 / -	4	Partial capture
11-04 15:40	40m	-17 / -12	R2SN	-5 / -5	6	✓ Full exchange observed
11-04 15:39	40m	-18 / -	S53AK	-1 / -12	3	Partial capture
10-21 19:07	40m	- / -9	EX7CQ	+4 / -	2	✓ Closing fragment
10-14 18:35	40m	- / -	CT1BFP	-2 / -	8	Partial capture
10-12 18:26	40m	- / -15	RY7G	+2 / -	2	Partial capture
10-12 18:14	40m	- / -	PE1NPS	-4 / -	2	Partial capture
10-12 18:14	40m	-11 / -14	UA4FEN	-6 / -16	6	✓ Full exchange observed
10-12 17:15	40m	- / -5	UR5VLC	-11 / -	3	✓ Closing fragment
10-12 17:13	40m	- / -	UR9QQ	-5 / -	3	Partial capture
09-26 18:32	40m	- / -14	9A1CCB	+7 / -	3	✓ Closing fragment
09-26 18:29	40m	- / -13	DK7ZT	-9 / -	3	Partial capture
08-23 09:25	20m	-13 / -15	EA1BWU	-6 / -	5	Partial capture
08-23 09:01	20m	-13 / -	G4GSA/P	- / -	3	Partial capture
08-12 07:11	20m	- / -	RX3ASQ	-20 / -	2	Partial capture
08-12 05:58	20m	- / -2	F4LNM	+2 / -	3	Partial capture
08-11 08:37	20m	- / -	HB9HOR	-10 / -	7	Partial capture
08-10 08:15	20m	- / -	DK3HV	-5 / -	4	Partial capture
08-10 08:11	20m	-14 / -	TA2EE	- / -	2	✓ Closing fragment
08-10 08:11	20m	-15 / -	DK3HV	-10 / +7	2	Partial capture
08-10 08:10	20m	- / -4	YO6LM	-8 / -	2	Partial capture
08-09 07:37	20m	-24 / -2	YO4NF	-4 / +5	4	✓ Full exchange observed
08-09 07:36	20m	-22 / -	4Z4DX	- / +1	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
160500 -16 1609  CQ YO3AUM KN34 (x2)
161015  -1 1609  YO3AUM HA7TM JN97
161030 -11 1609  HA7TM YO3AUM -11
161045  +0 1609  YO3AUM HA7TM R-12
161100 -11 1608  HA7TM YO3AUM RRR
161115  +4 1609  YO3AUM HA7TM 73 (x2)
171445  -9  688  YO3AUM PD7BDN JO22 (x6)
171845  -5  890  YO3AUM DM2CNE 73

20m

UTC    dB Audio  Message
084445 -10 3072  YO3AUM HB9HOR JN47
055845  +3  317  YO3AUM F4LNM JN09 (x3)
071130 -19 1407  YO3AUM RX3ASQ KO95 (x2)
072600 -15  238  CQ YO3AUM KN34                        a1
090145 -14  312  G4GSA/P YO3AUM KN34 (x3)
092515 -13  282  EA1BWU YO3AUM KN34
092600  -5  282  YO3AUM EA1BWU -15 (x4)

10m

UTC    dB Audio  Message
081445  -9  491  YO3AUM IK4LZH JN54

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee