R5DB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO95

Receiver-side FT8 activity involving R5DB, decoded by SO8OO in southeastern Poland. 40 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, across 6 UTC dates in the available aggregate history. Observed between 2026-07-26 and 2026-09-18.

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 40 FT8 messages attributed to R5DB as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (58%), followed by 80 m (23%) and 40 m (20%). Most decodes (88%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (80%); the estimated median was 0 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

0 dB

Estimated median S/N

Bands

160m · 23 80m · 9 40m · 8

First attributed message: 2026-07-26
Last attributed message: 2026-09-18 02:59 UTC

Observed FT8 message patterns

Attributed sample: 40 messages
Active dates: 6 UTC dates
Estimated median S/N: 0 dB
Estimated 10th-90th percentile: -15 to +10 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 5, 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 R5DB in decoded directed-looking exchanges:

RI1FJL · Franz Josef Land ×2 RD1A/7 · European Russia RI1FJZ · Franz Josef Land VP2MAA · Montserrat

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 R5DB

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: KO95 · 33 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,309 km (approx.)
Last such locator decoded: 2026-09-18 02:59 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	R5DB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-18 02:59	160m	+14 / -	HK3X	- / -	2	Partial capture
09-18 02:46	160m	+11 / -	VP2MAA	- / -	3	✓ Closing fragment
09-17 19:54	160m	+4 / -	RI1FJZ	- / -	6	Partial capture
09-17 19:43	160m	- / -	RD1A/7	-2 / -	4	✓ Closing fragment
09-17 16:48	80m	- / -	R7DX	0 / -	3	Partial capture
09-17 16:35	160m	+2 / -	RI1FJZ	- / -4	3	✓ Closing fragment
09-13 17:35	40m	-6 / -	KH8WW	- / -	4	Partial capture
09-13 17:29	40m	- / -7	R3ZG	-10 / -	2	Partial capture
09-13 17:27	40m	-4 / -	KH8WW	- / -	3	Partial capture
09-01 18:56	80m	- / -	UB6OAK	-18 / -	4	Partial capture
09-01 18:55	80m	- / -	RN6HK	+8 / -	2	Partial capture
09-01 18:51	80m	-12 / -	RI1FJL	- / -10	6	✓ Closing fragment
09-01 18:42	80m	-19 / -	RI1FJL	- / -	2	Partial capture
08-30 21:04	160m	+2 / -	RI1FJL	- / -2	9	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
194430 -10 1991  R5DB <RD1A/7> +25 (x2)
195445  +0 1293  RI1FJZ R5DB KO95 (x6)
024645 +12 2444  VP2MAA R5DB KO95 (x3)
024930 -12 2468  R5DB EA1CQ +01
025900 +10 2217  HK3X R5DB KO95 (x2)
030145  +5  392  R5DB R1AP -03

80m

UTC    dB Audio  Message
185215 -12 2202  RI1FJL R5DB KO95 (x5)
185500  +8 2202  R5DB RN6HK LN14 (x2)
185630 -13 2249  R5DB UB6OAK KN88 (x4)
164445  -1 2485  RI1FJZ R5DB KO95
164830 -17 1676  R5DB R7DX KN84 (x3)

40m

UTC    dB Audio  Message
160100 -21 2130  R0UAR/P R5DB KO95
172715  +0 1675  KH8WW R5DB KO95
172900 -12 1618  R5DB R3ZG -07
172915  -8 1883  KH8WW R5DB KO95
172930  -9 1618  R5DB R3ZG -07
172945  -5 1883  KH8WW R5DB KO95 (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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