RD4AM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LN28

Receiver-side FT8 activity involving RD4AM, decoded by SO8OO in southeastern Poland. 35 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-08-24 and 2026-09-02.

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 35 FT8 messages attributed to RD4AM as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (74%), followed by 40 m (26%). Several six-hour UTC windows tied for the largest share (69%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (74%); the estimated median was +1 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

+1 dB

Estimated median S/N

Bands

40m · 9 20m · 26

First attributed message: 2026-08-24
Last attributed message: 2026-09-02 16:33 UTC

Observed FT8 message patterns

Attributed sample: 35 messages
Active dates: 5 UTC dates
Estimated median S/N: +1 dB
Estimated 10th-90th percentile: -15 to +7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 9, strong (≥ -8 dB) 26.

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 RD4AM in decoded directed-looking exchanges:

BG7BVI · China DM2DXA · Fed. Rep. of Germany R9AL · Asiatic Russia YO9PH · Romania RI1FJL · Franz Josef Land RM5F · 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 RD4AM

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: LN28 · 18 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,686 km (approx.)
Last such locator decoded: 2026-09-02 16:31 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	RD4AM S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-02 16:33	40m	-14 / -2	RM5F	-2 / -8	4	✓ Full exchange observed
09-02 16:31	40m	-12 / -	RI1FJL	- / -18	3	✓ Closing fragment
09-02 16:26	40m	-4 / -	RI1FJL	- / -	2	Partial capture
08-29 04:29	20m	-12 / -	ZP5DBC	- / -	2	Partial capture
08-27 04:34	20m	+8 / 0	R9AL	-10 / -5	4	✓ Full exchange observed
08-27 04:34	20m	+5 / -	KB2ELA	- / -	3	Partial capture
08-27 04:29	20m	-4 / -	KC4DB	- / -	4	Partial capture
08-27 04:27	20m	+1 / -	W2AJR	- / -	2	Partial capture
08-26 16:18	40m	-12 / -	SN40KZE	- / -11	2	Partial capture
08-26 16:12	20m	- / -12	BG7BVI	-17 / -	3	✓ Closing fragment
08-26 16:08	20m	0 / -	RI1FJL	- / -	2	Partial capture
08-24 05:17	20m	+2 / -	IK2ZJR	- / -11	4	Partial capture
08-24 05:14	20m	+4 / -	YO9PH	- / +3	2	✓ Closing fragment
08-24 05:13	20m	+3 / -	DM2DXA	- / -2	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
161845  -8 1931  SN40KZE RD4AM LN28 (x2)
045000  -1 1783  RD4AM LZ936BA R+02
162645  -6 1649  RI1FJL RD4AM LN28 (x5)
163300  +1  838  RD4AM RM5F KO85
163315 -15 1852  RM5F RD4AM -08
163330  -5  838  RD4AM RM5F R-02
163345 -12 1852  RM5F RD4AM RR73
163400  -6  597  RD4AM DK8HC JO42

20m

UTC    dB Audio  Message
042730  +1 1818  W2AJR RD4AM LN28
042900  -8 1657  KC4DB RD4AM LN28 (x4)
043430  +4 2409  KB2ELA RD4AM LN28
043445 -11 2410  RD4AM R9AL +00
043500  +4 2408  R9AL RD4AM R-05
043515  -9 2059  RD4AM R9AL RR73
043530 +13 2408  R9AL RD4AM 73
043600  +7 2408  KB2ELA RD4AM LN28 (x2)
042900 -14 1970  ZP5DBC RD4AM LN28 (x2)
043130 -10 1969  HA5LB RD4AM -19

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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