DM4SH — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO30

Receiver-side FT8 activity involving DM4SH, decoded by SO8OO in southeastern Poland. 867 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 48 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-17.

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 867 FT8 messages attributed to DM4SH as the transmitting token by decoded message structure across 48 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (45%), followed by 80 m (33%) and 20 m (11%). Most decodes (61%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

867

Messages attributed

UTC dates decoded

137

Active 15-min windows

-7 dB

Estimated median S/N

Bands

160m · 41 80m · 286 60m · 13 40m · 389 20m · 99 10m · 39

First attributed message: 2026-06-07
Last attributed message: 2026-10-17 20:26 UTC

Observed FT8 message patterns

Attributed sample: 867 messages
Active dates: 48 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -14 to +3.3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 52, moderate (-15 to -9 dB) 315, strong (≥ -8 dB) 500.

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 DM4SH in decoded directed-looking exchanges:

F1PBZ · France ×2 LA4NM · Norway ×2 IK4TVP · Italy DA6HF · Fed. Rep. of Germany DF5AH · Fed. Rep. of Germany EW2ZC · Belarus G8MIA · England IV3KPS · Italy UT4WT · Ukraine EA2AUK · Spain RX7O · European Russia RZ4FWA · 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 DM4SH

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: JO30 · 515 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,053 km (approx.)
Last such locator decoded: 2026-10-17 20:25 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	DM4SH S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-17 20:25	160m	-14 / -	IV3KPS	- / -22	2	✓ Closing fragment
10-17 20:18	160m	-8 / +7	DF5AH	-5 / +10	5	✓ Full exchange observed
10-17 19:20	40m	0 / -	5Q1X	- / -1	2	✓ Closing fragment
10-17 19:19	40m	-5 / +3	DF4FS	-13 / +2	3	✓ Full exchange observed
10-04 15:29	40m	- / -8	DM5MA	-1 / -	2	✓ Closing fragment
10-03 23:13	160m	+3 / -12	EW2ZC	+8 / -3	7	✓ Full exchange observed
10-01 14:13	40m	-8 / -	F8VNU	- / +6	2	✓ Closing fragment
09-28 20:34	40m	+2 / -	JH1FNU	- / -	3	Partial capture
09-28 20:33	40m	+2 / +8	F5SJC	-3 / +5	5	✓ Full exchange observed
09-28 19:59	80m	+2 / -1	LA4NM	+6 / +1	4	✓ Full exchange observed
09-28 19:54	80m	+8 / -	F1PBZ	-5 / -1	2	✓ Closing observed
09-28 19:47	80m	-1 / +6	DL9DAJ	+2 / +3	4	✓ Full exchange observed
09-28 19:31	80m	+10 / -14	R5AV	+12 / 0	4	✓ Full exchange observed
09-28 19:25	80m	+7 / -	V51WH	- / -	6	Partial capture
09-25 06:23	40m	-12 / -	3D2USU	- / -	2	Partial capture
09-25 06:19	40m	-11 / -	3D2USU	- / -	3	Partial capture
09-25 06:16	40m	-4 / -	HB9EFK	- / -	2	Partial capture
09-25 06:14	40m	-4 / -9	E75FM	-8 / -6	4	✓ Full exchange observed
09-22 08:42	40m	-14 / -	F1PBZ	- / -3	2	✓ Closing fragment
09-22 05:08	80m	- / -	SP1ZMO	-14 / -	5	Partial capture
09-22 05:06	80m	-2 / +3	DO5PY	-11 / +7	5	✓ Full exchange observed
09-22 05:02	80m	-7 / +4	F5ILV	-7 / -1	7	✓ Full exchange observed
09-22 05:02	80m	+2 / -16	G6PWS	-6 / +5	5	✓ Full exchange observed
09-13 18:40	80m	- / -	F5LVR	-8 / -	7	Partial capture
09-13 18:33	160m	-12 / -	R6OBN	- / -	3	Partial capture
09-13 18:27	160m	-12 / -	DA6HF	- / -8	2	✓ Closing fragment
09-13 18:21	80m	+2 / -	DL0NS	- / -	2	✓ Closing fragment
09-13 17:49	40m	0 / -10	IV3VFP	-2 / +7	4	✓ Full exchange observed
09-09 09:00	40m	-11 / -	M8FQT	- / -10	4	Partial capture
09-07 05:16	80m	-6 / +10	DO1FZL	-13 / -	5	✓ Full exchange observed
09-07 05:14	40m	-3 / -	LA1SNA	-14 / 0	3	✓ Closing observed
09-05 05:40	40m	- / -	HA8SDI	+6 / -	2	Partial capture
09-05 05:40	40m	-8 / -13	F4EXC	-4 / -15	4	✓ Full exchange observed
09-02 15:23	40m	-5 / -	G4SRT	- / -10	2	✓ Closing fragment
08-31 13:24	40m	- / -	DL5MK	0 / -	2	✓ Closing fragment
08-31 13:16	40m	-10 / -	PD0PWH	- / +10	2	✓ Closing fragment
08-30 06:09	40m	-4 / -	NY1A	- / -	3	Partial capture
08-30 05:57	40m	-3 / -	TI5GAX	- / -	6	Partial capture
08-30 05:56	40m	+4 / -	OM7AG	+6 / -	4	✓ Closing observed
08-30 05:52	80m	-3 / -	LY7Z	-4 / -13	4	✓ Closing observed
08-30 05:48	80m	0 / -	F5LMJ	- / -4	2	✓ Closing fragment
08-30 05:47	80m	-5 / -	DA0RR	+6 / -	4	✓ Full exchange observed
08-30 05:45	80m	-5 / -	NA3M	- / -	3	Partial capture
08-28 08:40	10m	- / -14	IK4TVP	-14 / -	3	✓ Closing fragment
08-26 08:49	40m	-11 / -	F4JYD	- / +3	3	✓ Closing fragment
08-26 08:48	40m	-9 / -	DB9JH	- / +10	2	✓ Closing fragment
08-26 08:41	40m	-7 / -	F5ADH	- / -	2	✓ Closing fragment
08-21 07:19	40m	- / -15	SP1ZMO	-9 / -	5	Partial capture
08-20 05:41	40m	-7 / -	OA4ENG	- / -15	3	✓ Closing fragment
08-20 05:38	40m	-1 / +4	G0BLB	-6 / -	5	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
231445  -1  890  EW2ZC DM4SH R-03 (x2)
201545  -6  890  CQ DM4SH JO30 (x5)
201800  -3 2004  DM4SH DF5AH JO41
201815  -6  890  DF5AH DM4SH +10
201830  -5 2004  DM4SH DF5AH R+07
201845 -10  890  DF5AH DM4SH RR73
201900  -7 2004  DM4SH DF5AH 73
202515 -11  890  CQ DM4SH JO30
202545 -12  890  IV3KPS DM4SH -22 (x2)

40m

UTC    dB Audio  Message
152930  +1 2563  DM4SH DM5MA R-08 (x2)
191845  +2  928  CQ DM4SH JO30 (x2)
191945  -5  928  DF4FS DM4SH +02
192000 -16  929  DM4SH DF4FS R+03 (x2)
192045  -1  928  5Q1X DM4SH -01 (x2)
193015  -1  928  CQ DM4SH JO30 (x2)
193245  -1  928  F4HSB DM4SH -05
194000  -8 1636  DM4SH M9RDX R+01
194045  +6  928  CQ DM4SH JO30
194130 -16 2503  DM4SH M8MFU R+09

80m

UTC    dB Audio  Message
194800  +2  891  DM4SH DL9DAJ R+06
194815  -3  892  DL9DAJ DM4SH RR73
194830  +2  892  DM4SH DL9DAJ 73
195345  +5  892  CQ DM4SH JO30
195415  +8  892  F1PBZ DM4SH R-01
195430  -5 2653  DM4SH F1PBZ RR73
195715  +4  892  CQ DM4SH JO30 (x4)
195915  +1  892  LA4NM DM4SH +01
195930  +4  892  DM4SH LA4NM R-01
195945  +3  892  LA4NM DM4SH RR73
200000  +7  892  DM4SH LA4NM 73
232015  +5  892  CQ DM4SH JO30

60m

UTC    dB Audio  Message
184730  +3  921  CQ DM4SH JO30 (x3)
184915 -22 1404  DM4SH IU5HIU JN53
052715 -14 1555  DM4SH EA5BM IM99
052745 -11 1820  DM4SH IK4CBO JN54

10m

UTC    dB Audio  Message
083915 -21 1674  CQ DM4SH JO30
084030 -14 1692  DM4SH IK4TVP -14 (x3)

20m

UTC    dB Audio  Message
082315  -4  965  YO5PHL DM4SH RR73
082415  -5  965  EA2AUK DM4SH +06 (x2)
102100  -9  968  CQ DM4SH JO30 (x4)
105230 -10  968  UT4QM DM4SH -10 (x2)
105430 -12  968  TF3AK DM4SH JO30 (x4)
085545  -6  968  RZ4FWA DM4SH RR73
085630 -14 1962  DM4SH R4FDW -08

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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