DK4IO — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JN49

Receiver-side FT8 activity involving DK4IO, decoded by SO8OO in southeastern Poland. 71 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-08-31.

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 71 FT8 messages attributed to DK4IO as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (58%), followed by 40 m (35%) and 10 m (7%). Most decodes (93%) fell within the six-hour window 11:00-17:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (65%); the estimated median was -1 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-1 dB

Estimated median S/N

Bands

40m · 25 20m · 41 10m · 5

First attributed message: 2026-06-09
Last attributed message: 2026-08-31 16:39 UTC

Observed FT8 message patterns

Attributed sample: 71 messages
Active dates: 6 UTC dates
Estimated median S/N: -1 dB
Estimated 10th-90th percentile: -15 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 18, strong (≥ -8 dB) 46.

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 DK4IO in decoded directed-looking exchanges:

BG4UCZ · China BG7BMG · China JG3LGD · Japan SA3SHN · Sweden DK2SW · Fed. Rep. of Germany HA3AN · Hungary M6XZD · England

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 DK4IO

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: JN49 · 46 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 920 km (approx.)
Last such locator decoded: 2026-08-31 16:38 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	DK4IO S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-17 12:48	40m	- / +7	DK2SW	-21 / -	2	✓ Closing fragment
08-31 16:38	40m	-4 / -	M6XZD	- / -10	3	✓ Closing fragment
08-31 16:35	40m	-14 / -	<...>	- / -12	2	Partial capture
08-31 16:23	20m	+2 / -	VU2KPH	- / -	2	Partial capture
08-28 13:42	20m	+4 / -	RI1FJL	- / -	11	Partial capture
08-28 11:59	20m	0 / -	RI1FJL	- / -	4	Partial capture
08-28 11:55	20m	0 / -	RI1FJL	- / -	2	Partial capture
08-28 11:43	20m	+6 / -	RI1FJL	- / -	13	Partial capture
08-28 11:41	20m	+6 / -	SA3SHN	- / +6	4	✓ Closing fragment
08-28 11:40	20m	+4 / -	RA0AG	- / -	2	Partial capture
08-26 15:26	40m	-13 / -	YU2MS	- / -12	3	Partial capture
08-26 15:22	40m	-17 / -1	HA3AN	-6 / +6	5	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
152245 -16 1540  HA3AN DK4IO JN49
152300  -5 1540  DK4IO HA3AN -01
152315 -18 1540  HA3AN DK4IO R+06
152330  -7 1540  DK4IO HA3AN RR73
152345 -17 1540  HA3AN DK4IO 73
152645 -12 1579  YU2MS DK4IO JN49 (x3)
163530 -15 1282  <...> DK4IO JN49 (x2)
163815  -5  550  M6XZD DK4IO JN49 (x3)
124800 -22 2173  DK4IO DK2SW R+07 (x2)

20m

UTC    dB Audio  Message
134315  +1  344  RI1FJL DK4IO JN49 (x10)
161945 -10 2345  BG7BMG DK4IO 73
162315  +2 1673  VU2KPH DK4IO JN49 (x2)
162900  +1 1688  BU2FW DK4IO JN49
163145  -2  988  BG5JGG DK4IO JN49

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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