DH7SB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JN48

Receiver-side FT8 activity involving DH7SB, decoded by SO8OO in southeastern Poland. 45 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, across 1 UTC dates in the available aggregate history. Last observed 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 45 FT8 messages attributed to DH7SB as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (44%), followed by 80 m (38%) and 40 m (18%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

80m · 17 60m · 20 40m · 8

First attributed message: 2026-08-31
Last attributed message: 2026-08-31 19:47 UTC

Observed FT8 message patterns

Attributed sample: 45 messages
Active dates: 1 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -24 to -1 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 15, strong (≥ -8 dB) 19.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with DH7SB in decoded directed-looking exchanges:

HS0ZOY · Thailand MI7RDK · Northern Ireland WB2BIN · United States EC5M · Spain EB3ENW · Spain F4FPR · France W4KWS · United States DF8WU · Fed. Rep. of Germany DJ0CL · Fed. Rep. of Germany DJ6OI · Fed. Rep. of Germany DL1UDO · Fed. Rep. of Germany DL4DTL · Fed. Rep. of Germany

Most frequent locator attributed to DH7SB

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: JN48 · 28 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 941 km (approx.)
Last such locator decoded: 2026-08-31 19:47 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	DH7SB S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-31 20:35	20m	- / -5	HS0ZOY	+4 / -	2	✓ Closing fragment
08-31 20:34	20m	- / -9	MI7RDK	+4 / -	2	✓ Closing fragment
08-31 20:32	20m	- / -3	WB2BIN	-20 / -	2	✓ Closing fragment
08-31 19:47	80m	-24 / -2	DO2RG	+1 / -	3	✓ Closing observed
08-31 19:44	80m	-24 / -	IU3MAG	- / -13	3	✓ Closing fragment
08-31 19:42	80m	-24 / -	F4IFO	- / -13	2	✓ Closing fragment
08-31 19:35	80m	- / -7	DJ0CL	+10 / -	2	✓ Closing fragment
08-31 19:26	80m	- / -9	DL1UDO	0 / -	3	✓ Closing fragment
08-31 19:24	80m	-11 / -2	DJ6OI	-10 / -13	5	✓ Full exchange observed
08-31 19:18	80m	- / -1	IK2VFR/P	-20 / -	2	✓ Closing fragment
08-31 19:15	80m	-16 / -	DF8WU	- / -13	2	✓ Closing fragment
08-31 02:58	60m	-2 / +3	EB3ENW	-2 / -7	5	✓ Full exchange observed
08-31 02:54	60m	-4 / -	W4KWS	- / -20	2	✓ Closing fragment
08-31 02:51	60m	-3 / -1	F4FPR	-13 / -6	5	✓ Full exchange observed
08-31 02:44	40m	-11 / -	TT1GD	- / -	2	Partial capture
08-31 02:40	40m	-12 / -4	EC5M	-12 / -	2	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
203215 -24 1425  DH7SB WB2BIN -03 (x2)
203400  +4  539  DH7SB MI7RDK -09 (x2)
203530  +5  393  DH7SB HS0ZOY -05 (x2)

80m

UTC    dB Audio  Message
192700  +0  650  DH7SB DL1UDO 73
192915 -11 1997  DL4DTL DH7SB RR73
192945 -16 1997  CQ DH7SB JN48
193515 +14 1034  DH7SB DJ0CL -07 (x2)
193845 -15 1998  DK1RWR DH7SB JN48
194245 -24 1997  F4IFO DH7SB R-13 (x2)
194345 -22 1997  CQ DH7SB JN48
194445 -24 1997  IU3MAG DH7SB JN48 (x3)
194745 -24 1997  DO2RG DH7SB JN48
194800  +2 1337  DH7SB DO2RG -02 (x2)

60m

UTC    dB Audio  Message
025500  -5 1025  CQ DH7SB JN48 (x7)
025845  -5  685  DH7SB EB3ENW JN11
025900  +1 1025  EB3ENW DH7SB -07
025915  +1  685  DH7SB EB3ENW R+03
025930  -4 1025  EB3ENW DH7SB RR73
025945  -3  685  DH7SB EB3ENW 73
030000  -1 1025  CQ DH7SB JN48 (x3)

40m

UTC    dB Audio  Message
023530 -18 1028  TI2ALF DH7SB R-12
023630 -14 1029  CQ DH7SB JN48 (x4)
024045 -12 1081  DH7SB EC5M -04
024130 -12 1028  EC5M DH7SB 73
024415 -13 1029  TT1GD DH7SB JN48 (x2)

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