DH3KAR — 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 DH3KAR, decoded by SO8OO in southeastern Poland. 110 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 9 UTC dates in the available aggregate history. Observed between 2026-08-18 and 2026-10-22.

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 110 FT8 messages attributed to DH3KAR as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (57%), followed by 80 m (43%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (78%); the estimated median was -5 dB.

Overview

110

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

80m · 47 40m · 63

First attributed message: 2026-08-18
Last attributed message: 2026-10-22 22:18 UTC

Observed FT8 message patterns

Attributed sample: 110 messages
Active dates: 9 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -12 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 22, strong (≥ -8 dB) 86.

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 DH3KAR in decoded directed-looking exchanges:

IU4DTV · Italy ×2 SV1DKR · Greece ×2 DL7ACA · Fed. Rep. of Germany EC5M · Spain LA1PHA · Norway LZ5UY · Bulgaria M1DBW · England MI0ULK · Northern Ireland OZ3MC · Denmark SN4K · Poland 4L7T · Georgia DL0FTT · Fed. Rep. of Germany

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 DH3KAR

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 · 45 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,053 km (approx.)
Last such locator decoded: 2026-10-22 22:18 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	DH3KAR S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-22 22:15	80m	0 / -	4L7T	-18 / -	4	✓ Closing observed
10-07 20:51	80m	-9 / -5	OK1WLM	+12 / +1	5	✓ Full exchange observed
10-07 20:48	80m	+7 / -4	G7RHF	-16 / -3	3	✓ Full exchange observed
10-07 20:45	80m	-7 / -	OH6FSO	- / -20	3	✓ Closing fragment
09-13 21:03	80m	-4 / -	DO5RBB	- / +10	2	Partial capture
09-13 21:02	80m	0 / -9	YU7AS	+6 / -4	5	✓ Full exchange observed
09-13 20:54	80m	-10 / -8	DL9KM	-5 / -11	5	✓ Full exchange observed
09-13 20:52	80m	-10 / -	HF9T	- / -13	4	✓ Closing fragment
09-13 20:51	80m	-13 / -	DA6WA	- / -22	2	Partial capture
09-13 20:50	80m	-12 / -	F6FHZ	- / -25	2	Partial capture
09-13 20:47	80m	-7 / -	DO9JTR	- / -4	2	Partial capture
09-13 20:38	80m	-8 / -	F5NNN	- / -	2	Partial capture
09-01 21:24	40m	-11 / -	MW7GQB	- / -	5	Partial capture
08-27 22:06	40m	-2 / -15	DL7ACA	+4 / -19	15	✓ Full exchange observed
08-27 22:04	40m	-3 / -	SN4K	- / +2	3	✓ Closing fragment
08-27 22:00	40m	0 / -	MI0ULK	- / -11	4	✓ Closing fragment
08-27 21:58	40m	-3 / -12	SV1DKR	-15 / -	4	✓ Closing observed
08-27 21:44	40m	-6 / -	EC5M	- / -14	6	✓ Closing fragment
08-27 21:38	40m	-3 / -	LA1PHA	-7 / -12	4	✓ Closing observed
08-27 21:36	40m	-3 / -8	M7KBB	-21 / -14	8	Partial capture
08-27 21:33	40m	-2 / -9	LZ5UY	0 / -11	5	✓ Full exchange observed
08-27 21:28	40m	-6 / -11	IU4DTV	-5 / -13	7	✓ Full exchange observed
08-27 21:27	40m	-9 / -	M1DBW	-13 / -10	4	✓ Closing observed
08-26 21:57	80m	+2 / -15	CT7AUT	-18 / -	6	Partial capture
08-26 21:56	80m	+3 / -9	HA7TM	+19 / -4	3	✓ Full exchange observed
08-26 21:50	80m	+9 / +5	DO8PAT	-6 / -4	7	✓ Full exchange observed
08-26 21:48	40m	-3 / -	EA4D	- / -	2	Partial capture
08-26 21:40	40m	+2 / -	DL2EAD/QRP	- / +2	2	Partial capture
08-26 21:36	40m	-6 / -	CT1END/P	- / -11	2	Partial capture
08-26 21:30	40m	-3 / -	EA8UP	- / -16	3	Partial capture
08-26 21:24	40m	-8 / 0	OZ3MC	-8 / -6	6	✓ Full exchange observed
08-18 22:08	80m	- / -14	RA3RDN	+4 / -	4	Partial capture
08-18 22:06	80m	- / +5	LB9ZG	-6 / -	2	Partial capture
08-18 22:01	80m	-4 / -	DL0FTT	- / -10	2	✓ Closing fragment
08-18 21:57	80m	-6 / -4	IZ0MIT	-2 / -15	5	✓ Full exchange observed
08-18 21:54	80m	- / +4	PI4DX	+4 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
204800 -15 1607  DH3KAR G7RHF -04
204815  +7  696  G7RHF DH3KAR R-03
204830 -18 1607  DH3KAR G7RHF RR73
204945  +6  696  G1SUM DH3KAR JO30
205030 -10  696  M0MLS DH3KAR JO30
205130  -6  696  OK1WLM DH3KAR JO30
205145 +13 2033  DH3KAR OK1WLM -05
205200  -8  696  OK1WLM DH3KAR R+01
205215 +10 2033  DH3KAR OK1WLM RR73
205230 -13  696  OK1WLM DH3KAR 73
221530  +0 1945  4L7T DH3KAR JO30 (x2)
221645 -21  287  DH3KAR 4L7T +15 (x2)
221815  -9 1945  M7FSE DH3KAR JO30

40m

UTC    dB Audio  Message
220945  -3  604  DL7ACA DH3KAR RRR
221000  +4  604  DH3KAR DL7ACA 73
221015  +0  604  DL7ACA DH3KAR RRR
221030  +0  603  DH3KAR DL7ACA 73
221115  -3  604  DL7ACA DH3KAR RRR
221130  -1  604  DH3KAR DL7ACA 73
212400 -10 2221  MW7GQB DH3KAR JO30 (x5)
212630  -3  725  OK2ZAW DH3KAR JO30
202615  -1 2160  MM7WQD DH3KAR JO30
202745  -6 2160  7Z1BQ DH3KAR JO30
211430 -22 2180  BG7BVI DH3KAR JO30

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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