DH5SA — 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 DH5SA, decoded by SO8OO in southeastern Poland. 56 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-08-23.

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 56 FT8 messages attributed to DH5SA as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (91%), followed by 80 m (9%). Several six-hour UTC windows tied for the largest share (54%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -17 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

80m · 5 20m · 51

First attributed message: 2026-06-14
Last attributed message: 2026-08-23 17:43 UTC

Observed FT8 message patterns

Attributed sample: 56 messages
Active dates: 8 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -23 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 31, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 11.

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 DH5SA in decoded directed-looking exchanges:

DG1RMY · Fed. Rep. of Germany DH1HF · Fed. Rep. of Germany DL7RAY · Fed. Rep. of Germany DL9KM · Fed. Rep. of Germany F1ODM · France F4LPV · France IZ1HJU · Italy M7PHE · England OH3MB · Finland PD0IFI · Netherlands R6JC · European Russia RN6MA · 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 DH5SA

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 · 22 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 920 km (approx.)
Last such locator decoded: 2026-08-23 17:43 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	DH5SA S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-23 17:49	20m	- / -26	UR5VLC	-5 / -	4	✓ Closing fragment
08-16 10:08	20m	-22 / -16	DG1RMY	-21 / -22	4	✓ Full exchange observed
08-16 10:06	20m	-12 / -2	OH3MB	-23 / -10	3	✓ Full exchange observed
08-16 10:03	20m	-20 / -	S55A	- / -3	2	✓ Closing fragment
08-16 10:02	20m	-18 / -	IZ1HJU	- / -8	2	✓ Closing fragment
07-30 21:33	20m	- / -	PD9JPV	-17 / -	4	Partial capture
07-30 21:21	20m	- / -14	TA2ED	-10 / -	3	Partial capture
07-19 20:18	20m	-8 / -11	F4LPV	0 / -2	5	✓ Full exchange observed
07-11 13:35	20m	-19 / -	M7PHE	- / -11	2	✓ Closing fragment
07-04 20:14	20m	-18 / -9	F4HSB	-19 / -10	2	Partial capture
07-04 19:54	20m	-7 / -	DL9KM	0 / -	2	✓ Closing observed
07-04 19:52	20m	-11 / -	DH1HF	- / -15	3	✓ Closing fragment
07-04 19:47	20m	-10 / -	DL7RAY	- / -9	2	✓ Closing fragment
07-02 23:33	20m	- / -10	R6JC	-10 / -	2	✓ Closing fragment
07-02 21:54	20m	- / -8	RN6MA	+3 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
100715 -14 2036  OH3MB DH5SA RR73
100845 -22 2036  DG1RMY DH5SA -22
100900 -21 1670  DH5SA DG1RMY R-16
100915 -22 2036  DG1RMY DH5SA RR73 (x2)
101115 -15 2036  CQ DH5SA JN49 (x3)
135830 -19 2034  F1PPH DH5SA -13
135930 -13 2035  HL3GOB DH5SA JN49
174300 -23 2038  BG2GWN DH5SA JN49
174945 -15 2030  DH5SA UR5VLC R-26 (x4)

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.

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