7K4DHB — 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: Japan Most frequent locator attributed to this token: PM95

Receiver-side FT8 activity involving 7K4DHB, decoded by SO8OO in southeastern Poland. 2 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-09 and 2026-09-17.

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 2 FT8 messages attributed to 7K4DHB as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The available sample contains attributed decodes on 80 m (50%) and 40 m (50%). The sample is too small to infer a recurring UTC-hour or received-S/N pattern.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

S/N pattern not inferred

Bands

80m · 1 40m · 1

First attributed message: 2026-09-09
Last attributed message: 2026-09-17 17:04 UTC

Observed FT8 message patterns

Attributed sample: 2 messages
Active dates: 2 UTC dates
S/N summary: Too few decodes
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with 7K4DHB in decoded directed-looking exchanges:

ES2AJ · Estonia EU7A · Belarus SP3PLD · Poland R3IX · European Russia R7DX · European Russia IZ8VYU · Italy RA6BL · European Russia RD3K · European Russia RL9LR · Asiatic Russia TA7MMI · Asiatic Turkey UA9MA · Asiatic Russia UN2G · Kazakhstan

Most frequent locator attributed to 7K4DHB

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: PM95
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,693 km (approx.)
Last such locator decoded: 2026-09-17 17:04 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	7K4DHB S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-06 18:01	80m	- / -	UT7UA	-1 / -	7	Partial capture
11-06 17:59	80m	- / -	IS0ZOD	-4 / -	8	Partial capture
11-06 17:58	80m	- / -14	TA7MMI	-7 / -	4	✓ Closing fragment
11-06 16:05	80m	- / -17	RL9LR	-19 / -	3	✓ Closing fragment
10-30 19:24	40m	- / -	UX0CZ	+3 / -	5	Partial capture
09-26 15:38	80m	- / -	RX6DA	-4 / -	6	Partial capture
09-26 15:33	80m	- / -19	RA6BL	+4 / -	2	✓ Closing fragment
09-26 15:31	80m	- / -	RX6DA	-12 / -	2	Partial capture
09-26 15:30	80m	- / -	UR4LBG	-16 / -	2	Partial capture
09-26 15:27	80m	- / -	UR4LBG	-7 / -	3	Partial capture
09-26 15:22	80m	- / -	OH5LF	0 / -	5	Partial capture
09-26 15:20	80m	- / -	OH3NAQ	-2 / -	2	Partial capture
09-26 15:13	80m	- / -	UA4FKT	-10 / -	3	Partial capture
09-22 17:11	160m	- / -2	EU7A	+18 / -	2	✓ Closing fragment
09-22 15:30	80m	- / -18	RX6LG	+2 / -	2	Partial capture
09-22 15:29	80m	- / -	R3RB	-8 / -	8	Partial capture
09-22 15:27	80m	- / -13	RD3K	+4 / -	5	✓ Closing fragment
09-22 15:27	80m	- / -14	UN7LZ	-12 / -	3	✓ Closing fragment
09-22 15:24	80m	- / -6	YE4FNN	-19 / -	2	✓ Closing fragment
09-22 15:17	80m	- / -21	RA6LO	-3 / -	4	Partial capture
09-22 15:16	80m	- / -	OH4BW	-10 / -	2	Partial capture
09-22 15:13	80m	- / -19	RA6LO	-4 / -	3	Partial capture
09-21 18:19	160m	- / -22	SP3PLD	+17 / -	2	✓ Closing fragment
09-21 18:15	160m	- / -15	ES2AJ	-4 / -	2	✓ Closing fragment
09-17 17:09	80m	- / -	IK6FWJ	+14 / -	2	Partial capture
09-17 17:08	80m	- / -	OM8GT	+17 / -	2	Partial capture
09-17 17:07	80m	- / -	LA9GX	+1 / -	2	Partial capture
09-17 17:06	80m	- / -	UA3RMB	+2 / -	3	Partial capture
09-17 17:06	80m	- / -17	IZ8VYU	+9 / -	3	✓ Closing fragment
09-09 21:05	40m	- / -	R3SN	-1 / -	2	Partial capture
09-09 15:36	40m	-11 / -8	R3IX	-7 / -	4	✓ Closing observed
09-09 15:31	40m	- / -4	R7DX	+5 / -	4	✓ Closing fragment
09-09 15:30	40m	- / -	PI4DX	-4 / -	6	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
180000  -6 1881  7K4DHB IS0ZOD JN40
180030  -6 1992  7K4DHB TA7MMI RR73
180030  -3 1881  7K4DHB IS0ZOD JN40
180100  -2 2722  7K4DHB UT7UA KO50
180100  -1 1881  7K4DHB IS0ZOD JN40
180130  -1 2722  7K4DHB UT7UA KO50
180130  -4 1992  7K4DHB TA7MMI RR73
180130  -4 1881  7K4DHB IS0ZOD JN40
180200  -2 2722  7K4DHB UT7UA KO50
180200  -1 1881  7K4DHB IS0ZOD JN40
180230  -2 2722  7K4DHB UT7UA KO50
180230  -4 1881  7K4DHB IS0ZOD JN40
180300  -1 2722  7K4DHB UT7UA KO50 (x3)

40m

UTC    dB Audio  Message
153245  +5 2783  7K4DHB R7DX R-04
153245  -4 1118  7K4DHB PI4DX JO21
153315  +5 2783  7K4DHB R7DX 73
153615 -11 1551  7K4DHB R3IX KO76 (x2)
153700 -11  316  R3IX 7K4DHB RR73
153715  -1 1550  7K4DHB R3IX 73
210530  +1  794  7K4DHB R3SN KO94 (x2)
131230  -9  320  7K4DHB OH3MB KP20
192430  +0  387  7K4DHB UX0CZ KN59 (x5)

160m

UTC    dB Audio  Message
181500  -6 1762  7K4DHB ES2AJ -15 (x2)
181900 +19  868  7K4DHB SP3PLD -22 (x2)
182400  -3 2031  7K4DHB OH5KNL -19
171130 +13 2657  7K4DHB EU7A -02 (x2)

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

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