YO3BY — 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: KN35

Receiver-side FT8 activity involving YO3BY, decoded by SO8OO in southeastern Poland. 45 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-29 and 2026-09-22.

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 45 FT8 messages attributed to YO3BY as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (53%), followed by 40 m (47%). Several six-hour UTC windows tied for the largest share (84%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (82%); the estimated median was -2 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-2 dB

Estimated median S/N

Bands

80m · 24 40m · 21

First attributed message: 2026-07-29
Last attributed message: 2026-09-22 05:19 UTC

Observed FT8 message patterns

Attributed sample: 45 messages
Active dates: 5 UTC dates
Estimated median S/N: -2 dB
Estimated 10th-90th percentile: -10 to +7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 8, strong (≥ -8 dB) 37.

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 YO3BY in decoded directed-looking exchanges:

IK4LZH · Italy OK1WCF · Czech Republic UT4WT · Ukraine UX7QV · Ukraine YO3GNF · Romania

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 YO3BY

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: KN35 · 32 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 628 km (approx.)
Last such locator decoded: 2026-09-22 05:19 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	YO3BY S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-22 05:20	80m	- / -	EA3AKY	-16 / -	2	Partial capture
09-22 05:18	80m	+1 / -19	DO3VE	-1 / -	8	Partial capture
09-22 05:14	80m	+8 / -10	UX7QV	+12 / -	5	✓ Full exchange observed
09-22 05:12	80m	- / -21	OK1HEH	+4 / -	3	Partial capture
09-22 05:11	80m	-2 / +1	YO3GNF	-6 / -	5	✓ Full exchange observed
08-04 06:11	40m	-10 / -	DG2SAT	- / -1	3	Partial capture
08-04 06:09	40m	-10 / -	K4CAE	- / -	2	Partial capture
08-04 06:08	40m	- / -	F5RRS	-16 / -	4	Partial capture
08-02 10:33	20m	- / -	IQ4JO	-10 / -	2	Partial capture
08-02 10:33	20m	- / -10	UT7UJ	-5 / -	4	Partial capture
08-02 09:01	40m	- / -	UT4PA	-12 / -	3	Partial capture
08-02 05:28	80m	- / -	SQ8GBG	+11 / -	4	Partial capture
08-01 10:47	20m	- / -	IK4LZH	+8 / -	3	✓ Closing fragment
07-29 16:12	80m	0 / +10	UT4WT	+7 / -8	5	✓ Full exchange observed
07-29 04:02	40m	0 / -	OK1WCF	- / -	2	✓ Closing fragment
07-29 04:02	40m	- / -	DL9KM	-12 / -	6	Partial capture
07-29 02:45	40m	-7 / -	ND3N	- / -	2	Partial capture
07-29 02:43	40m	-2 / -	KC3UPG	- / -	3	Partial capture
07-28 11:49	20m	- / +1	PD3LKN	-17 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
051515 +12  942  YO3BY UX7QV 73
051600  -1  942  CQ YO3BY KN35 (x4)
051830  -2  942  DO3VE YO3BY KN35 (x3)
051945  +5  554  YO3BY DO3VE -19
052015 -13 2130  YO3BY EA3AKY JN01
052015  +3  554  YO3BY DO3VE -22
052045 -18 2130  YO3BY EA3AKY JN01
052045  +0  554  YO3BY DO3VE -22 (x3)

40m

UTC    dB Audio  Message
090215 -11  976  YO3BY UT4PA KO20
090415 -18  976  YO3BY DH5BM JO41
060830 -13  976  CQ YO3BY KN35                         a1
060845 -17 1951  YO3BY F5RRS JN36
060900 -10  976  CQ YO3BY KN35                         a1
060915 -17 1951  YO3BY F5RRS JN36
060930  -8  976  K4CAE YO3BY KN35
060945 -17 1951  YO3BY F5RRS JN36 (x2)
061100 -13  976  K4CAE YO3BY KN35
061130 -12  976  DG2SAT YO3BY -01 (x3)
061300  -9  976  CQ YO3BY KN35
061400  -9  976  ON7KEI YO3BY -08

20m

UTC    dB Audio  Message
114900 -18 1090  YO3BY PD3LKN JO22 (x2)
104715  +9  461  YO3BY IK4LZH JN54
104715 -13  974  YO3BY F4BJN JN25
104745  +9  460  YO3BY IK4LZH R+15 (x2)
104845 -12  530  YO3BY DK8HC/P JO42
103315 -10 1014  YO3BY UT7UJ -10
103315  -9 2366  YO3BY IQ4JO JN63 (x2)
103415 -13 1013  YO3BY UT7UJ -10 (x3)

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

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