DH5BM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO41

Receiver-side FT8 activity involving DH5BM, decoded by SO8OO in southeastern Poland. 8,801 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 54 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-10.

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 8,801 FT8 messages attributed to DH5BM as the transmitting token by decoded message structure across 54 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (67%), followed by 20 m (18%) and 10 m (8%). The busiest six-hour window was 19:00-01:00 UTC, containing 41% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

8,801

Messages attributed

UTC dates decoded

781

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 603 40m · 5,912 20m · 1,541 10m · 745

First attributed message: 2026-06-08
Last attributed message: 2026-09-10 20:55 UTC

Observed FT8 message patterns

Attributed sample: 8,801 messages
Active dates: 54 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -18 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,608, moderate (-15 to -9 dB) 2,866, strong (≥ -8 dB) 4,327.

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 DH5BM in decoded directed-looking exchanges:

PA0MUS · Netherlands ×3 EA2DYB · Spain ×2 EB5RCA · Spain ×2 G0RVY · England ×2 IV3KFD · Italy ×2 LY1DY · Lithuania ×2 M7CWF · England ×2 R2EA/P · European Russia ×2 RK3AW · European Russia ×2 RO3ZR · European Russia ×2 CN2DX · Morocco ×2 DM2GG · Fed. Rep. of Germany ×2

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 DH5BM

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: JO41 · 6,017 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 916 km (approx.)
Last such locator decoded: 2026-09-10 20:55 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	DH5BM S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-10 20:52	40m	+2 / -	EA4HUQ	- / -	4	Partial capture
09-10 20:47	40m	+7 / -	F5AGL	- / -13	8	✓ Closing fragment
09-10 20:43	40m	0 / -	R2BPS	- / -14	2	✓ Closing fragment
09-10 20:41	40m	0 / -	RX3ASQ	- / -	9	Partial capture
09-10 20:40	40m	+7 / -	SQ2JDM	- / -	2	Partial capture
09-10 20:36	40m	-4 / -	M7NGJ	- / -13	6	Partial capture
09-10 07:30	40m	-6 / -	GM4YMI	- / -15	2	Partial capture
09-10 07:25	40m	-2 / -	IS0AAS	- / -	9	Partial capture
09-10 07:15	40m	-10 / -	2E0LXG	- / -3	3	✓ Closing fragment
09-10 07:11	40m	-6 / -	RX3ASQ	- / -	9	Partial capture
09-10 07:08	40m	+3 / -	SP100PKP	- / -16	3	Partial capture
09-10 07:03	40m	-7 / -	RX3ASQ	- / -	5	Partial capture
09-10 06:58	40m	0 / -	UB3AMO	-9 / +6	6	✓ Closing observed
09-10 06:56	40m	-2 / -	OM8ABC	- / -12	4	✓ Closing fragment
09-10 06:53	40m	-4 / -	SP8ADU	- / -8	2	Partial capture
09-10 06:52	40m	-4 / -	GW6OHV	- / +1	2	✓ Closing fragment
09-10 06:47	40m	- / -6	IK2DDR	-8 / -	2	✓ Closing fragment
09-10 06:46	40m	0 / -	IU1HGN	- / -14	2	Partial capture
09-10 06:41	40m	-2 / -	RX3ASQ	- / -	8	Partial capture
09-10 06:34	40m	-6 / -	EA4IDN	- / -10	9	✓ Closing fragment
09-10 06:33	40m	-5 / -	NP3MR	- / -	2	Partial capture
09-10 06:30	40m	-6 / -	NP3MR	- / -	2	Partial capture
09-10 06:25	40m	+1 / -	FK8HC	- / -	7	Partial capture
09-10 06:24	40m	-1 / -	KD8VYT	- / -	2	Partial capture
09-10 06:22	40m	+10 / -	EA7JMO	- / -13	3	✓ Closing fragment
09-10 06:20	40m	-4 / -21	IK3JBP	-6 / -2	5	✓ Full exchange observed
09-10 06:18	40m	-3 / -	F4KMN	- / -7	3	✓ Closing fragment
09-10 06:14	40m	-9 / -	ZL3TUX	- / -	7	Partial capture
09-10 06:12	40m	-5 / -	RC2Y	- / -	2	Partial capture
09-10 06:07	40m	-5 / -	PD1RGW	- / -	8	Partial capture
09-10 06:05	40m	-6 / -	SO100PKP	- / -11	2	Partial capture
09-10 06:04	40m	-6 / -	RX3ASQ	- / -	2	Partial capture
09-10 06:03	40m	0 / -	ZL3GAV	- / -13	3	✓ Closing fragment
09-10 06:02	40m	0 / -	K2TQC	- / -	2	Partial capture
09-10 05:58	40m	-8 / -	RX3ASQ	- / -	4	Partial capture
09-10 05:54	40m	-1 / -19	YO4SX	-6 / -	3	Partial capture
09-10 05:52	40m	-6 / -	OZ/KD0NDU	- / +2	2	Partial capture
09-10 05:47	40m	-2 / -	EH1PDA	- / -17	8	✓ Closing fragment
09-10 05:42	40m	-4 / -	IH9/IT9JUI	- / -13	7	Partial capture
09-10 05:37	40m	-12 / -	KE9END	- / -	7	Partial capture
09-10 05:30	80m	-10 / -	IK6GTF	- / -	6	Partial capture
09-10 05:25	80m	-18 / -	WD1V	- / -	9	Partial capture
09-10 05:23	80m	- / -7	DO1YSF	-12 / -	2	✓ Closing fragment
09-10 05:15	80m	-6 / -	F5OIH	- / -1	3	✓ Closing fragment
09-10 05:04	80m	-1 / -4	F6DHD	-8 / -	3	✓ Closing observed
09-10 04:56	80m	-6 / -3	DL2DBI	-16 / -11	5	✓ Full exchange observed
09-10 04:53	80m	-13 / -	DA6PP	- / -	4	Partial capture
09-10 04:45	80m	-12 / -13	DH1DAC	-10 / -3	4	✓ Full exchange observed
09-10 04:36	80m	-11 / -	KE4EB	-9 / -10	5	✓ Closing observed
09-10 04:30	80m	-22 / -	MM0CKK	- / -18	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
204615  +2 1256  RX3ASQ DH5BM JO41 (x3)
204745  +6  615  F5AGL DH5BM JO41 (x8)
205245  +4  847  EA4HUQ DH5BM JO41 (x4)

80m

UTC    dB Audio  Message
052500 -23 1202  WD1V DH5BM JO41 (x9)
053045 -13 1739  IK6GTF DH5BM JO41 (x6)

160m

UTC    dB Audio  Message
005245  -8  260  DH5BM 4L7T LN21 (x4)

20m

UTC    dB Audio  Message
095915 +10 2875  OH0/ES2TT DH5BM -04 (x15)

10m

UTC    dB Audio  Message
130645 -20 1550  HA7JLR DH5BM JO41
130915 -11  559  A93MO DH5BM JO41 (x2)
131245  -2  522  MM0UIO DH5BM JO41 (x4)
134230 -24 1660  DH5BM F4LQJ -07
134415 -17 1729  LU3HBA DH5BM JO41 (x2)
134615 -10 2598  ON4IQ DH5BM JO41
145945 -17 1067  HC7AE DH5BM R-15
150800  -6 2293  DH5BM SV2JAO -18 (x3)

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