DK4VF — 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: JO43

Receiver-side FT8 activity involving DK4VF, decoded by SO8OO in southeastern Poland. 440 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 51 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-10-20.

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 440 FT8 messages attributed to DK4VF as the transmitting token by decoded message structure across 51 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (76%), followed by 20 m (14%) and 80 m (8%). Most decodes (76%) fell within the six-hour window 11:00-17:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

440

Messages attributed

UTC dates decoded

148

Active 15-min windows

-10 dB

Estimated median S/N

Bands

160m · 12 80m · 35 40m · 333 20m · 60

First attributed message: 2026-06-10
Last attributed message: 2026-10-20 14:25 UTC

Observed FT8 message patterns

Attributed sample: 440 messages
Active dates: 51 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -19 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 101, moderate (-15 to -9 dB) 156, strong (≥ -8 dB) 183.

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 DK4VF in decoded directed-looking exchanges:

F4IZH · France ×2 SP7OK · Poland ×2 DO3VE · Fed. Rep. of Germany DO7RMA · Fed. Rep. of Germany SP9ENV · Poland SQ6WA · Poland 9A5E · Croatia EA4D · Spain F1UNR · France F5RRS · France ON4CJU · Belgium OS4K · Belgium

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 DK4VF

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: JO43 · 240 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 964 km (approx.)
Last such locator decoded: 2026-10-20 14:24 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	DK4VF S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-20 14:22	40m	-13 / +7	SP2JNK	-8 / -9	8	✓ Full exchange observed
10-20 14:04	40m	+5 / -	DH6HF	-5 / -3	6	✓ Full exchange observed
10-20 13:44	40m	-2 / -4	HA5AZD	-10 / -21	3	✓ Full exchange observed
10-20 13:30	40m	-8 / -	ON3ONX	- / -18	2	Partial capture
10-20 12:33	40m	-12 / -4	IK2ZJR	-8 / -13	6	✓ Full exchange observed
10-20 11:46	40m	-8 / -	DL4RE	- / +4	2	Partial capture
10-20 11:40	40m	-14 / -	DL9AHB/QRP	-16 / -16	4	Partial capture
10-20 11:12	40m	-19 / -	OE5KBO	- / -	5	Partial capture
10-19 13:52	40m	-5 / -6	R80SAA	+2 / -16	4	✓ Full exchange observed
10-19 13:50	40m	-9 / -	PD3JB	- / -	3	Partial capture
10-18 11:50	40m	-10 / -	M8BJL	- / -17	4	Partial capture
10-18 10:30	40m	-22 / -	F4MXQ	- / -18	2	Partial capture
10-14 18:31	80m	-4 / +3	SP5OXJ	-4 / -15	4	✓ Full exchange observed
10-14 18:29	80m	+1 / -9	ON5ZZ	-4 / -15	3	✓ Full exchange observed
10-14 18:27	80m	- / +5	DD0IPA	-2 / -	2	✓ Closing fragment
10-11 14:32	40m	+6 / 0	SP7OK	+2 / -	3	✓ Closing observed
10-11 13:48	40m	-9 / -	DL1ECG	- / -11	2	Partial capture
10-10 15:11	40m	+2 / -10	OE1TKS	+11 / -11	4	✓ Full exchange observed
10-09 09:26	40m	-24 / -	PD0OTH	- / -19	2	Partial capture
10-09 09:18	40m	- / -	DK3ME	-14 / -	10	✓ Closing fragment
10-09 09:06	40m	-19 / -	DL2KDF	- / -8	2	Partial capture
10-08 15:08	40m	+1 / -	II5GG	- / -24	7	Partial capture
10-08 14:52	40m	-10 / -	EX7CQ	- / -24	2	Partial capture
10-08 14:37	40m	-11 / -	SP9FF	- / -	3	Partial capture
10-08 14:28	40m	-6 / -	DF7QR	-2 / -2	4	✓ Closing observed
10-08 14:24	40m	-10 / -8	SP4BB	0 / -16	5	✓ Full exchange observed
10-07 16:32	80m	-4 / +3	OK1HWS	-4 / -11	6	✓ Full exchange observed
10-07 15:38	80m	+1 / +3	DF0AWG	+8 / +1	4	✓ Full exchange observed
10-07 15:11	80m	-12 / -	HA7UL	- / -	2	Partial capture
10-07 15:08	80m	-6 / +6	DL1EGU	-4 / -7	3	Partial capture
09-30 16:37	40m	- / -	PG9S	-12 / -	2	Partial capture
09-30 16:35	40m	-1 / -7	DL7WSH	-12 / -10	2	Partial capture
09-30 15:53	40m	-7 / -	DG7JG	-8 / -9	2	✓ Closing observed
09-30 14:53	40m	0 / -15	SQ8GMW	-6 / -20	10	✓ Full exchange observed
09-30 14:35	40m	-11 / -	DD3JN	-16 / -6	4	✓ Full exchange observed
09-30 14:33	40m	-4 / -	DK7AM	- / -	4	Partial capture
09-30 14:17	40m	-13 / +8	DL1NB	-12 / -9	4	✓ Full exchange observed
09-30 11:46	40m	-8 / -1	TM14LEO	-8 / -5	2	Partial capture
09-28 15:08	40m	+2 / -	DG2DBT	- / -	3	Partial capture
09-28 15:04	40m	-3 / -3	DM3ER	+3 / -20	6	✓ Full exchange observed
09-28 15:02	40m	0 / -	M9MRX	- / -16	2	Partial capture
09-28 14:55	40m	-2 / -2	SP2EOE	-2 / -22	3	✓ Full exchange observed
09-28 14:50	40m	-8 / -	PA2RIC/P	- / -19	5	Partial capture
09-28 14:41	40m	-8 / -	F4GHN	- / -10	2	Partial capture
09-28 14:35	40m	-6 / -19	F4GHN	-8 / -11	8	Partial capture
09-26 16:44	80m	-3 / -	F5ASD	-24 / -24	7	✓ Closing observed
09-26 14:46	40m	-9 / -2	DG3YEV	-4 / -10	3	✓ Full exchange observed
09-25 11:12	40m	-16 / -	DL7DS	- / -24	2	Partial capture
09-24 16:48	80m	-10 / -1	DL0AA	-5 / -	4	Partial capture
09-24 16:38	80m	- / -	DO5DMF	+8 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
134445  -7 1447  DK4VF HA5AZD RR73
140400  +2  496  DH6HF DK4VF JO43 (x2)
140445  -6  495  DK4VF DH6HF +13
140500  +7  496  DH6HF DK4VF R-03
140515  -2  495  DK4VF DH6HF RRR (x2)
142245 -10 1481  SP2JNK DK4VF JO43 (x5)
142500  -9 1482  DK4VF SP2JNK +07
142515 -16 1482  SP2JNK DK4VF R-09
142530  -8 1482  DK4VF SP2JNK RR73

80m

UTC    dB Audio  Message
163300  -6 1901  OK1HWS DK4VF R-11
163315  +0 1901  DK4VF OK1HWS RR73 (x2)
163500  -1 1900  OK1HWS DK4VF R-11
163515  -4 1901  DK4VF OK1HWS RR73
182700  -3  741  DK4VF DD0IPA +05 (x2)
182930 -19 2227  DK4VF PG9S JO32
182945  +0  508  DK4VF ON5ZZ -09
183000  +1  508  ON5ZZ DK4VF R-15
183015  -9  508  DK4VF ON5ZZ RR73
183145  -3 2083  SP5OXJ DK4VF JO43
183230  -2 2083  DK4VF SP5OXJ +03
183245  -6 2083  SP5OXJ DK4VF R-15
183300  -5 2083  DK4VF SP5OXJ RR73

160m

UTC    dB Audio  Message
184830  -4  726  CQ DK4VF JO43 (x2)
184945 -18 1527  DK4VF DO7RMA -04
185000 -10 1527  DO7RMA DK4VF R-05
185015 -19 1526  DK4VF DO7RMA RR73
185315 -16  996  SQ6WA DK4VF JO43
185330 +10  996  DK4VF SQ6WA +04
185345  -4  996  SQ6WA DK4VF R-02
185400  +8  996  DK4VF SQ6WA RR73
185545 -12 1232  ON7AVR DK4VF JO43 (x2)
185800 -11  891  SP9ENV DK4VF JO43
185815  -8  891  DK4VF SP9ENV +00
185830 -18  891  SP9ENV DK4VF R+03
185845 -13  891  DK4VF SP9ENV RR73

20m

UTC    dB Audio  Message
105830  +3 1041  II7MGLE DK4VF R+01
111130  -6 1569  DK4VF EA4D -08 (x3)
112545  -3  408  F8STC DK4VF R-04
112745  -2 2492  EA2WX DK4VF R-11
132545  -6 1528  DK4VF F4JLS -13
132830  -9  240  DK4VF F4JHO +03
134700 +16 2396  DK4VF F4IZH +02 (x7)

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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