DK4FH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO64

Receiver-side FT8 activity involving DK4FH, decoded by SO8OO in southeastern Poland. 1,622 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 82 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 1,622 FT8 messages attributed to DK4FH as the transmitting token by decoded message structure across 82 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (50%), followed by 20 m (38%) and 80 m (11%). Most decodes (63%) fell within the six-hour window 07:00-13:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (67%); the estimated median was -5 dB.

Overview

1,622

Messages attributed

UTC dates decoded

253

Active 15-min windows

-5 dB

Estimated median S/N

Bands

80m · 183 40m · 803 20m · 613 10m · 23

First attributed message: 2026-06-06
Last attributed message: 2026-09-04 12:25 UTC

Observed FT8 message patterns

Attributed sample: 1,622 messages
Active dates: 82 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -14 to +4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 96, moderate (-15 to -9 dB) 438, strong (≥ -8 dB) 1,088.

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 DK4FH in decoded directed-looking exchanges:

F1IQH · France ×7 IK4LZH · Italy ×5 F4HSB · France ×3 UA9SY · Asiatic Russia ×2 OK1DBE · Czech Republic ×2 M8FQT · England ×2 E70SZ · Bosnia-Herzegovina ×2 DL9KM · Fed. Rep. of Germany ×2 UR5WCS · Ukraine ×2 F1PBZ · France ×2 LB2YJ · Norway ×2 ON6CQ · Belgium ×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 DK4FH

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: JO64 · 669 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 784 km (approx.)
Last such locator decoded: 2026-09-04 12:24 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	DK4FH S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-04 12:25	40m	-4 / -	IW3AOT	- / +4	2	Partial capture
09-04 12:23	40m	-5 / -	M8FQT	- / -16	2	✓ Closing fragment
09-04 12:20	40m	-5 / -3	IK2GAU	-22 / +9	5	✓ Full exchange observed
09-04 07:24	40m	-3 / -	PD5WA	- / +5	3	Partial capture
09-04 07:23	40m	0 / -	AM42SDC	- / -	2	Partial capture
09-04 07:19	40m	-3 / -	ON8FAB	- / +6	5	Partial capture
09-04 07:18	40m	0 / -	SP7OK	- / +7	2	✓ Closing fragment
09-03 07:37	40m	-8 / -	DL6KBW	- / -	2	Partial capture
09-03 07:37	40m	-3 / +2	HA1ZW	-2 / -11	6	Partial capture
09-03 07:36	40m	-8 / -	DD1JD	-8 / -2	5	Partial capture
09-03 07:31	40m	-4 / -	M7SEY	- / 0	2	✓ Closing fragment
09-03 07:30	40m	-5 / -	DF0NN	-14 / +4	7	✓ Full exchange observed
09-03 07:28	40m	-4 / -	DL3KCQ	- / -	2	Partial capture
09-02 12:39	40m	-8 / +1	SP6AMI	-4 / +5	4	✓ Full exchange observed
09-02 12:37	40m	-6 / +6	DL7UKM	+3 / -	6	✓ Full exchange observed
09-02 12:35	40m	-4 / +4	SP6AMI	-7 / +1	4	✓ Full exchange observed
09-01 12:00	40m	-8 / -	MM7OGR	- / -5	2	Partial capture
09-01 11:59	40m	-6 / -	IK0XBU/P	- / -24	2	Partial capture
09-01 11:57	40m	-6 / -	LB8TG	- / +2	2	Partial capture
09-01 07:20	40m	0 / -	PV8AJ	- / -17	5	Partial capture
09-01 07:15	40m	+3 / -	G5GDX	- / -17	4	✓ Closing fragment
08-31 11:49	20m	- / -	IW5ALZ	-10 / -	2	Partial capture
08-31 07:09	40m	-2 / -	DL6LAY	- / +3	2	✓ Closing fragment
08-31 07:05	40m	0 / +3	DF0AWG	+4 / -	5	✓ Full exchange observed
08-31 07:04	40m	0 / +9	DJ2PW	-4 / -	4	✓ Full exchange observed
08-31 07:03	40m	-3 / -	KE8YOU	- / -	2	Partial capture
08-31 07:00	40m	0 / -	M8FQT	- / +3	3	✓ Closing fragment
08-31 06:59	40m	+1 / -	ES7GN	-17 / +8	3	✓ Closing observed
08-31 06:58	40m	+1 / -	DL6LAY	- / -6	2	Partial capture
08-30 12:13	40m	-4 / -	ON9TB	- / +10	4	✓ Closing fragment
08-30 12:12	40m	-5 / -	OZ7CL	-22 / -	2	✓ Closing observed
08-30 12:10	40m	-5 / -	DA0RR	- / +5	3	✓ Closing fragment
08-30 12:07	40m	-5 / -	F4IEW	- / -	2	Partial capture
08-30 12:07	40m	-3 / -	HA7WFF	- / +1	2	✓ Closing fragment
08-30 12:04	20m	+10 / -	M9NTS	- / -10	2	✓ Closing fragment
08-30 12:02	20m	+8 / -	RV3DTN	- / -1	2	Partial capture
08-30 12:01	20m	- / -11	G7EVY	-4 / -	2	✓ Closing fragment
08-30 12:00	20m	0 / -	NA3M	- / -	2	Partial capture
08-30 11:59	20m	-1 / -	HA7SJX	- / -9	2	✓ Closing fragment
08-30 11:55	20m	+8 / -11	G7EVY	+2 / -5	8	Partial capture
08-30 11:55	20m	+5 / -5	IK4LZH	+15 / -	5	✓ Closing observed
08-30 11:54	20m	+4 / -	R7OV	-1 / +6	7	✓ Closing observed
08-30 07:01	40m	-1 / -	DM2BPG	+2 / +10	6	✓ Full exchange observed
08-30 07:00	40m	+5 / -1	DM9EE	-8 / -1	4	✓ Full exchange observed
08-30 06:59	40m	+8 / -	KB3Z	- / -24	2	Partial capture
08-30 06:58	40m	+6 / -3	IW0RQJ	-3 / -18	4	✓ Full exchange observed
08-30 06:55	40m	- / +3	DK2M	+9 / -	2	✓ Closing fragment
08-30 06:51	40m	+3 / -	F4CVT	- / -16	6	✓ Closing fragment
08-29 19:46	80m	- / -19	TC3CT	-12 / -	2	Partial capture
08-29 19:41	80m	+11 / -	UT2PC	+8 / +3	4	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
072430  +2  982  PD5WA DK4FH +05 (x3)
122000  -4  982  IK2GAU DK4FH JO64
122015 -23 1684  DK4FH IK2GAU -03
122030  -6  982  IK2GAU DK4FH R+09
122045 -22 1684  DK4FH IK2GAU RR73
122100  -5  982  IK2GAU DK4FH 73
122200  -6  982  CQ DK4FH JO64 (x2)
122300  -5  982  M8FQT DK4FH -16 (x2)
122430  -8  982  CQ DK4FH JO64
122500  -5  982  IW3AOT DK4FH +04 (x2)

20m

UTC    dB Audio  Message
120015  -1 1019  HA7SJX DK4FH RR73
120045  -2 1019  NA3M DK4FH JO64 (x2)
120145  -4 1019  DK4FH G7EVY R-11 (x2)
120230  +7 1019  RV3DTN DK4FH -01 (x2)
120330  +7 1019  CQ DK4FH JO64
120400 +10 1019  M9NTS DK4FH -10 (x2)
064630  -5  737  DK4FH IW5ALZ JN53
064630  +9 1020  DK4FH TC30AGU R-09
114630 -12 2759  DK4FH IW5ALZ JN53 (x3)

80m

UTC    dB Audio  Message
193115  -1 1555  DK4FH RU3XK R-13 (x3)
193715 -10  709  DK4FH DO9SCH R+13
193730  -8  946  SP1ZMO DK4FH JO64
193745  -9  709  DK4FH DO9SCH R+13
193930  +0  947  DL1HTB DK4FH -08
193945  -9  614  DK4FH DL1HTB R+00
194115  +9  947  UT2PC DK4FH +03 (x2)
194200  +8  969  DK4FH UT2PC R KO21
194215 +13  947  UT2PC DK4FH RR73
194445  -1 1288  DK4FH DA6BOC -04
194645 -10  848  DK4FH TC3CT R-19 (x2)

10m

UTC    dB Audio  Message
145100  -6 1222  DK4FH DN9AD JO52 (x3)
074545 -20 2296  DK4FH SV1GYN +00
072745  -6 1808  DK4FH F4FSY -03 (x2)
072915 -21 1992  DK4FH DN9SGE JO42 (x2)
113400 -16 1030  CQ DK4FH JO64                         a1
114600  +7 2741  DK4FH F1PBZ -10 (x2)
115100  -4  682  DK4FH SV2CLJ KN10
141500 -13 1030  CQ DK4FH JO64 (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.

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