DH3SBB — 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 DH3SBB, decoded by SO8OO in southeastern Poland. 248 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 16 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-04.

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 248 FT8 messages attributed to DH3SBB as the transmitting token by decoded message structure across 16 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (63%), followed by 40 m (28%) and 80 m (8%). Most decodes (89%) fell within the six-hour window 19:00-01:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

248

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 19 40m · 69 20m · 156 10m · 4

First attributed message: 2026-06-06
Last attributed message: 2026-09-04 20:52 UTC

Observed FT8 message patterns

Attributed sample: 248 messages
Active dates: 16 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -19 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 72, moderate (-15 to -9 dB) 86, strong (≥ -8 dB) 90.

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 DH3SBB in decoded directed-looking exchanges:

RI1FJL · Franz Josef Land ×2 HG8LXL · Hungary A71AM · Qatar BA8BLK · China C31CT · Andorra DK3TNA · Fed. Rep. of Germany F5MXH · France F6BHK · France JA4LXY · Japan KF0YOB · United States OZ7CL · Denmark SP6AXW · Poland

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 DH3SBB

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 · 190 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 941 km (approx.)
Last such locator decoded: 2026-09-04 20:51 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	DH3SBB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-04 20:49	40m	-5 / -	RI1FJL	- / +2	6	✓ Closing fragment
09-02 23:12	80m	0 / -11	SM7TZK	+6 / -	7	Partial capture
09-02 23:07	80m	+4 / -	<...>	- / -6	2	Partial capture
09-02 23:02	80m	-15 / -	F5RMK	- / -15	7	✓ Closing fragment
08-30 23:09	40m	- / -4	RX9WM	-11 / -	2	✓ Closing fragment
08-30 22:54	40m	- / -15	TC30AUG	+2 / -	4	Partial capture
08-30 21:57	80m	- / -	DO5RRS	-5 / -	8	Partial capture
08-30 21:50	80m	-16 / -20	UA4FKT	+13 / +1	6	✓ Full exchange observed
08-30 21:47	80m	-17 / -10	F4BND	-16 / -11	9	✓ Full exchange observed
08-30 14:27	20m	0 / -	RI1FJL	-6 / -	4	✓ Closing observed
07-26 23:04	20m	-11 / -	NH6L	- / -	3	Partial capture
07-26 23:01	20m	-21 / -	HI3CH	- / -	5	Partial capture
07-26 22:58	20m	-19 / -	<...>	- / -	2	Partial capture
07-13 00:19	40m	-15 / -	YV5JDP	- / -	2	Partial capture
07-13 00:17	40m	-13 / -	K4JKB	- / -	3	Partial capture
07-13 00:08	40m	-13 / -	LU1VDF	- / -	13	Partial capture
07-13 00:06	40m	-9 / -9	RN6MA	-4 / -4	4	✓ Full exchange observed
07-13 00:05	40m	- / -	F4BYA	+7 / -	3	Partial capture
07-12 23:55	40m	-3 / -	TJ1GD/P	- / -15	4	✓ Closing fragment
07-12 00:53	40m	+1 / -	K2ZJ	- / -	9	Partial capture
07-12 00:49	40m	-6 / -	TJ1GD/P	- / -	6	Partial capture
07-12 00:46	40m	-17 / -	<...>	- / -6	5	Partial capture
07-09 22:13	20m	- / -11	V31MA	-14 / -	2	✓ Closing fragment
07-07 20:40	20m	-3 / -	W4DXM	- / -	6	Partial capture
07-07 20:37	20m	-2 / -	OE3UKW	- / +2	4	Partial capture
07-07 19:37	20m	-5 / -	<...>	- / -	4	Partial capture
07-06 22:47	20m	-14 / -	V31DL	- / -	9	Partial capture
07-06 20:58	20m	-12 / -	<...>	- / -19	7	Partial capture
07-06 20:46	20m	-6 / -18	UR7EU	-17 / -19	5	Partial capture
07-06 20:39	20m	-7 / -12	C31CT	-14 / -	3	✓ Closing observed
07-06 20:38	20m	- / -	DL3KZA	-2 / -	3	Partial capture
07-06 20:38	20m	-12 / -	DK3TNA	- / -5	2	✓ Closing fragment
07-06 20:33	20m	-11 / -8	SP6OWA	-1 / -2	4	✓ Full exchange observed
07-06 20:31	20m	-15 / -4	SP6AXW	-2 / -11	7	✓ Full exchange observed
07-06 20:08	20m	-3 / -14	JA4LXY	-4 / -15	5	✓ Full exchange observed
07-06 20:07	20m	-11 / -10	OZ7CL	-18 / -7	5	✓ Full exchange observed
07-05 09:58	10m	-22 / -	HG8LXL	- / -15	2	✓ Closing fragment
07-04 20:20	40m	-19 / -	<...>	- / -15	3	Partial capture
07-04 20:18	40m	-18 / -	DL70ESSEN	- / -	4	Partial capture
07-04 20:15	40m	-18 / -	<...>	- / -	2	Partial capture
07-04 19:55	40m	- / -13	A71UN	-18 / -	8	Partial capture
07-04 17:30	20m	-20 / -	BA8BLK	- / -17	3	✓ Closing fragment
07-03 23:57	40m	-16 / -	<...>	- / +8	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
001815 -12 2096  K4JKB DH3SBB JN48
001945 -10 1428  YV5JDP DH3SBB JN48 (x2)
225430  +1  608  DH3SBB TC30AUG -15 (x4)
230900 -11 1253  DH3SBB RX9WM -04 (x2)
204945  -5 1429  RI1FJL DH3SBB JN48 (x6)

80m

UTC    dB Audio  Message
230400 -19 1358  F5RMK DH3SBB R-15 (x4)
230715  +3  940  <...> DH3SBB JN48
230730  +1  881  DH3SBB OZ/KD0NDU -11
230745  +4  941  <...> DH3SBB R-06
230900  -6 1188  DH3SBB II7MGXX -05
231215  +4  772  SM7TZK DH3SBB JN48
231230  +6  772  DH3SBB SM7TZK -11
231245  -4  772  SM7TZK DH3SBB JN48
231300  +7  772  DH3SBB SM7TZK -11
231315  -1  772  SM7TZK DH3SBB JN48
231330  +5  772  DH3SBB SM7TZK -11
231345  +3  772  SM7TZK DH3SBB JN48

20m

UTC    dB Audio  Message
203030 -17 1765  DH3SBB F4NKE JN03
225830 -19 1240  <...> DH3SBB JN48 (x2)
230130 -16 1674  HI3CH DH3SBB JN48 (x5)
230430 -13  456  NH6L DH3SBB JN48 (x3)
142745  +3 1014  RI1FJL DH3SBB JN48 (x2)
142830  -6  420  DH3SBB RI1FJL RR73
142845  -3 1014  RI1FJL DH3SBB 73

10m

UTC    dB Audio  Message
094915 -13  754  LZ1JZ DH3SBB JN48
094930 -12 1325  DH3SBB DN9SGE JO42
095815 -23 1444  HG8LXL DH3SBB -15 (x2)
095915 -20 1444  CQ DH3SBB JN48
100430 -10 1064  DH3SBB DN9AVK JO51

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