DO4HHK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO54

Receiver-side FT8 activity involving DO4HHK, decoded by SO8OO in southeastern Poland. 658 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 26 UTC dates in the available aggregate history. Observed between 2026-07-06 and 2026-09-19.

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 658 FT8 messages attributed to DO4HHK as the transmitting token by decoded message structure across 26 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (97%), followed by 40 m (3%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15.2 dB.

Overview

658

Messages attributed

UTC dates decoded

114

Active 15-min windows

-15.2 dB

Estimated median S/N

Bands

80m · 641 40m · 17

First attributed message: 2026-07-06
Last attributed message: 2026-09-19 22:55 UTC

Observed FT8 message patterns

Attributed sample: 658 messages
Active dates: 26 UTC dates
Estimated median S/N: -15.2 dB
Estimated 10th-90th percentile: -24 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 326, moderate (-15 to -9 dB) 240, strong (≥ -8 dB) 92.

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 DO4HHK in decoded directed-looking exchanges:

DL3MIB · Fed. Rep. of Germany ×2 EW6BZ · Belarus ×2 RL2F · Kaliningrad ×2 S57TW · Slovenia ×2 PC2J · Netherlands 5P1KZX · Denmark 5P5Z · Denmark 8S7DL · Sweden 9A2AJ · Croatia 9A3EYA · Croatia 9A4ZM · Croatia 9A5E · Croatia

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 DO4HHK

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: JO54 · 407 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 892 km (approx.)
Last such locator decoded: 2026-09-19 22:55 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	DO4HHK S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 22:50	80m	-18 / -	DO7KGB	- / -	3	Partial capture
09-19 22:46	80m	-13 / -23	HA7VC/P	+7 / -	5	✓ Closing observed
09-19 22:10	80m	-22 / -10	DF3YG	-8 / -1	4	✓ Full exchange observed
09-19 22:07	80m	-24 / -14	PI4DX	+4 / -4	4	✓ Full exchange observed
09-19 22:03	80m	-16 / -20	YO6LM	+19 / -	5	✓ Closing observed
09-19 22:02	80m	-20 / -24	YO2BTW	+18 / -6	5	✓ Full exchange observed
09-19 22:01	80m	-14 / -	II4IANT	- / -	2	Partial capture
09-19 21:59	80m	-15 / -12	9A3EYA	+12 / -	4	✓ Closing observed
09-17 21:10	80m	- / -14	DO9SAM	+8 / -	2	✓ Closing fragment
09-14 19:55	80m	-21 / -	DL1JEL	- / -	2	Partial capture
09-14 19:39	80m	- / -16	OZ6TL	-2 / -	2	✓ Closing fragment
09-12 19:59	80m	- / -19	OZ1A	+2 / -	2	✓ Closing fragment
09-07 21:41	80m	-14 / -	OM2WW	- / -	2	Partial capture
09-07 21:25	80m	-16 / -	HB3YBG	- / -	2	Partial capture
09-07 21:09	80m	-17 / -16	EW6BZ	+1 / -5	5	✓ Full exchange observed
09-07 21:01	80m	-16 / -	EG1PDA	- / -	3	Partial capture
09-07 20:54	80m	-8 / -18	G0LZX	+2 / -7	5	✓ Full exchange observed
09-07 20:38	80m	-12 / -15	DO2YJG	-21 / -	5	Partial capture
09-07 20:34	80m	-10 / -12	DO1YFF	-2 / -	6	✓ Closing observed
09-04 21:29	80m	-8 / -	OV6ZM	- / -	2	Partial capture
09-04 21:04	80m	-18 / -10	F1PBZ	+2 / -15	3	Partial capture
09-04 20:46	80m	-4 / -15	S57TW	+4 / -4	9	✓ Full exchange observed
09-04 20:46	80m	-10 / -	RT6O	- / -	2	Partial capture
09-04 20:44	80m	-15 / -9	DA6KK	-17 / -9	5	✓ Full exchange observed
09-04 20:41	80m	-11 / -25	DO2SHJ	-2 / +4	6	✓ Full exchange observed
09-04 20:40	80m	-4 / -13	9A2AJ	+6 / -	3	✓ Closing observed
09-04 20:32	80m	- / -12	DO5WG	-6 / -	5	✓ Closing fragment
09-04 20:22	80m	- / -15	DL2RPN	0 / -	3	Partial capture
09-04 20:16	80m	-17 / -19	UW5KW	+2 / -6	4	✓ Full exchange observed
09-04 20:01	80m	-19 / -	DL2VN	- / -9	2	Partial capture
09-04 19:53	80m	-21 / -13	F5PBG	-19 / -13	3	Partial capture
09-04 19:52	80m	- / -24	DL0NS	-8 / -	2	✓ Closing fragment
09-04 19:46	80m	-20 / -13	OZ9GA	+4 / +8	3	✓ Full exchange observed
09-04 19:45	80m	- / -18	OZ1GC	+6 / -	2	Partial capture
09-03 21:31	80m	-13 / -17	IV3IHV	+11 / -	4	✓ Closing observed
09-03 21:28	80m	- / -15	IU5AWQ	+4 / -	2	Partial capture
09-03 21:16	80m	-22 / -8	DA6OOM	-16 / -	3	Partial capture
09-03 21:13	80m	-9 / -	OE9DAI	-14 / -2	2	✓ Closing observed
09-03 21:09	80m	-14 / -	IK6BSN	-2 / -4	4	✓ Closing observed
09-03 21:06	80m	-12 / -24	OE4AAC	+10 / +9	5	Partial capture
09-03 21:01	80m	-15 / -16	HB9TOC	+15 / -	3	Partial capture
09-03 21:00	80m	-12 / -	DF1IH	-6 / -8	3	✓ Closing observed
09-03 20:52	80m	-16 / -14	HB9EKJ	-10 / -	9	Partial capture
09-03 20:48	80m	- / -14	M8FQT	-3 / -	5	Partial capture
09-03 20:46	80m	- / -14	HB9EKJ	-19 / -	8	Partial capture
09-03 20:44	80m	-14 / -16	IU3MAG	+1 / +5	7	Partial capture
09-03 20:43	80m	-10 / -12	SQ9BC	+24 / +6	5	✓ Full exchange observed
09-03 20:42	80m	-16 / -	HB9EKJ	- / -	2	Partial capture
09-03 20:39	80m	-18 / -	IR7MGGC	- / -	2	Partial capture
09-03 20:38	80m	-10 / -	DJ1SAM	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
221115 -10 1700  DO4HHK DF3YG RR73
221130 -22  832  DF3YG DO4HHK 73
224600 -12 1954  HA7VC/P DO4HHK JO54
224615  +2 1953  DO4HHK HA7VC/P -23
224630 -13  414  OM0CS DO4HHK R+16
224645 +11 1953  DO4HHK HA7VC/P -23 (x2)
224730 -14 1954  HA7VC/P DO4HHK 73
224945  -3 1875  DO4HHK DK3ME RR73
225030 -15 1505  DO7KGB DO4HHK JO54
225100  -9 1310  IW6NEM DO4HHK JO54
225130 -17 1506  DO7KGB DO4HHK JO54 (x2)
225300 -16 1248  EU1AFX DO4HHK JO54
225500 -12 1310  IW6NEM DO4HHK JO54

40m

UTC    dB Audio  Message
222715  -5  862  DO4HHK DO4HHK -08 (x5)
222945  -8  862  <...> DO4HHK JO54
223045  -6  745  DO4HHK DO4HHK -09 (x6)
223545 -13 1808  <...> DO4HHK JO54 (x2)
223645 -14 1808  <OY/DO1BBM/M> DO4HHK JO54

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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