DL3JAC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO60

Receiver-side FT8 activity involving DL3JAC, decoded by SO8OO in southeastern Poland. 173 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 17 UTC dates in the available aggregate history. Observed between 2026-06-10 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 173 FT8 messages attributed to DL3JAC as the transmitting token by decoded message structure across 17 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (64%), followed by 40 m (36%). Several six-hour UTC windows tied for the largest share (97%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (66%); the estimated median was -5 dB.

Overview

173

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

40m · 63 20m · 110

First attributed message: 2026-06-10
Last attributed message: 2026-09-17 16:32 UTC

Observed FT8 message patterns

Attributed sample: 173 messages
Active dates: 17 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -15 to +7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 16, moderate (-15 to -9 dB) 42, strong (≥ -8 dB) 115.

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 DL3JAC in decoded directed-looking exchanges:

BH2WTV · China CT3MD · Madeira Islands EW6CY · Belarus EX7DY · Kyrgyzstan F5RRS · France HB9HYO · Switzerland HB9XBY · Switzerland JA8CJY · Japan R8AFR · Asiatic Russia SV9ANC · Crete TK/F6FDY · Corsica TK5K · Corsica

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 DL3JAC

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: JO60 · 106 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 628 km (approx.)
Last such locator decoded: 2026-09-17 16:28 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	DL3JAC S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-17 16:32	40m	-3 / -4	II9IAGM	-9 / -2	2	Partial capture
09-17 16:30	40m	-3 / -	UA4FEN	-8 / -7	5	✓ Closing observed
09-17 16:28	40m	-6 / -	II0IHMG	- / -7	2	Partial capture
09-17 16:25	40m	-4 / -	HZ1TT	- / -	3	Partial capture
09-17 16:20	40m	0 / -3	HB9OAU	-14 / -	3	✓ Closing observed
09-13 15:03	40m	+2 / -	OL900LTV	- / -	4	Partial capture
09-13 15:00	40m	-3 / -	PD0LBY	-20 / 0	4	✓ Closing observed
09-13 14:57	40m	+9 / -17	9A4AA	-6 / 0	6	✓ Full exchange observed
09-13 14:57	40m	- / -	HG8LXL	-3 / -	3	Partial capture
09-13 14:55	40m	-6 / +3	3Z100PKP	-10 / +7	3	Partial capture
08-30 16:13	40m	+8 / -	DL3LBK	+6 / -	6	✓ Full exchange observed
08-30 16:13	40m	+5 / -	OH/DG2SBL	-8 / -6	5	✓ Closing observed
08-30 16:08	40m	+3 / -3	OE9NET	-10 / -4	8	✓ Full exchange observed
08-30 16:06	40m	+6 / -	R9SAP	- / -	2	Partial capture
08-30 15:23	20m	- / +4	<...>	+5 / -	3	✓ Closing fragment
08-26 16:31	20m	- / -	UN0PA	-10 / -	2	✓ Closing fragment
08-26 16:24	20m	- / -3	F5RRS	+17 / -	3	✓ Closing fragment
08-26 16:23	20m	- / -16	TK/F6FDY	+1 / -	3	✓ Closing fragment
08-16 16:33	40m	-8 / -7	9A3SM	-15 / -	4	✓ Full exchange observed
08-16 16:31	40m	-11 / -	<...>	- / -	2	Partial capture
08-16 16:26	40m	-12 / -	HB9FGO	- / -	2	✓ Closing fragment
08-16 16:23	40m	-20 / -	F6FHZ	- / -15	2	✓ Closing fragment
08-16 16:22	40m	-14 / -	DK7ZT	-21 / +5	3	✓ Closing observed
08-16 16:20	40m	-8 / -	PE1NPS	- / -6	2	✓ Closing fragment
08-16 16:20	40m	-16 / -	9A4ZM	-14 / +4	6	✓ Closing observed
08-16 16:18	40m	-14 / -6	DA0LH	-11 / +7	3	✓ Full exchange observed
08-03 16:42	20m	- / -4	CT3MD	-4 / -	2	✓ Closing fragment
08-01 13:27	20m	-4 / -14	<...>	-12 / -14	3	Partial capture
08-01 13:23	20m	-22 / -	7X2KF	- / -	2	Partial capture
08-01 13:21	20m	-17 / -	<...>	- / 0	2	Partial capture
07-26 15:40	40m	-8 / -	HB9SFL	- / 0	2	✓ Closing fragment
07-26 15:38	40m	-10 / -	RA2FGK	- / -4	2	✓ Closing fragment
07-24 09:36	40m	- / -	UT4PA	-12 / -	2	Partial capture
07-24 09:26	20m	-3 / -	HB9XBY	- / -6	3	✓ Closing fragment
07-24 09:23	20m	0 / -	CR7BRV	- / -	3	Partial capture
07-23 13:05	40m	-21 / -	OZ1DYI	- / -	2	✓ Closing fragment
07-23 12:13	20m	-14 / -	HB9DUT	- / -	2	Partial capture
07-23 12:09	20m	-4 / -	UC8U	- / -	2	Partial capture
07-23 12:06	20m	-5 / -	<...>	- / -2	2	Partial capture
07-22 13:37	20m	- / +4	TK5K	-10 / -	2	✓ Closing fragment
07-21 16:27	20m	-9 / -	EW6CY	- / -	3	✓ Closing fragment
07-19 16:53	20m	-10 / -	4Z4DA	- / -	4	Partial capture
07-19 16:51	20m	-2 / -	BH2WTV	- / -11	3	✓ Closing fragment
07-19 16:43	20m	- / -11	SV9ANC	-14 / -	2	✓ Closing fragment
07-13 15:17	20m	-14 / -	9H4JX	- / -5	2	Partial capture
07-13 15:15	20m	-13 / -	HB9HYO	- / -7	3	✓ Closing fragment
07-07 16:43	20m	0 / -	ZR6LO	- / -	2	Partial capture
07-07 16:36	20m	-7 / -	ZR6LO	- / -12	5	Partial capture
07-07 16:33	20m	-9 / -	BG5CNL	- / -	3	Partial capture
07-07 16:27	20m	+1 / -	KF0YOB	- / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
162030 -16  788  DL3JAC HB9OAU RR73
162045  +0  789  HB9OAU DL3JAC 73
162115  -7 1729  HZ1TT DL3JAC JO60 (x4)
162815  -9 1458  II0IHMG DL3JAC JO60 (x2)
163015  -4 1455  UA4FEN DL3JAC R-07
163030 -11 1457  DL3JAC UA4FEN RR73
163045  -1 1456  UA4FEN DL3JAC R-07 (x2)
163130  -5 1457  DL3JAC UA4FEN RR73
163200  -9 1458  DL3JAC II9IAGM -04
163215  -3 1456  II9IAGM DL3JAC R-02

20m

UTC    dB Audio  Message
164200 -14  869  DL3JAC EX7DY RR73
160915 -17 1793  DL3JAC R8AFR RR73
162345  -1 2695  DL3JAC TK/F6FDY -16 (x3)
162445 +18 1876  DL3JAC F5RRS JN36 (x3)
162830  -7 2315  DL3JAC UN0PA -10 (x3)
151815  -4 2932  DL3JAC JA8CJY RR73
152330  +5  378  DL3JAC <...> +04 (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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