DD3HB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO64

Receiver-side FT8 activity involving DD3HB, decoded by SO8OO in southeastern Poland. 71 FT8 messages attributed to this token as transmitter, on 80m, 40m, 10m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-09-12.

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 71 FT8 messages attributed to DD3HB as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (58%), followed by 40 m (25%) and 80 m (17%). Most decodes (100%) fell within the six-hour window 12:00-18:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (73%); the estimated median was -4 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-4 dB

Estimated median S/N

Bands

80m · 12 40m · 18 10m · 41

First attributed message: 2026-06-13
Last attributed message: 2026-09-12 17:35 UTC

Observed FT8 message patterns

Attributed sample: 71 messages
Active dates: 4 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -13 to +5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 15, strong (≥ -8 dB) 52.

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 DD3HB in decoded directed-looking exchanges:

EC3A · Spain F1PBZ · France F4FSY · France F4PCM · France IU0SIB · Italy M0BEW · England SM5MEK · Sweden SP6M · Poland SP9UPH · Poland YL3ASB · Latvia F1ODM · France F5IXN · France

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 DD3HB

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: JO64 · 47 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 784 km (approx.)
Last such locator decoded: 2026-09-12 17:35 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	DD3HB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-12 17:36	80m	- / -	LZ2VQ	-8 / -	3	Partial capture
09-12 17:35	80m	- / -9	OE5ABL	-6 / -	2	Partial capture
09-12 17:33	80m	- / 0	DO4TYW	-16 / -	2	✓ Closing fragment
09-12 17:29	80m	0 / +1	SA3CAT	+10 / +1	5	✓ Full exchange observed
09-12 17:29	80m	- / -	LZ2VQ	0 / -	2	Partial capture
09-12 17:26	80m	- / -14	OE5ABL	+13 / -	3	Partial capture
09-12 17:21	40m	-6 / -	DJ0MAB	-5 / -10	4	✓ Closing observed
08-25 11:04	20m	- / -	RA1QX	-13 / -	4	Partial capture
08-25 10:58	20m	- / +3	F5IXN	+10 / -	3	✓ Closing fragment
08-25 10:55	20m	- / -12	IQ4JO	+1 / -	3	✓ Closing fragment
08-18 14:03	10m	-16 / -	CA6SNT	- / -17	2	Partial capture
08-18 13:54	10m	-4 / -	SM5MEK	- / -7	2	✓ Closing fragment
07-30 12:12	10m	- / 0	F4FSY	-18 / -	2	✓ Closing fragment
07-30 11:50	10m	- / -12	F1PBZ	-8 / -	2	✓ Closing fragment
06-27 12:43	10m	+6 / -	YL3ASB	- / -6	2	✓ Closing fragment
06-27 12:41	10m	- / -	F5CUN	-2 / -	8	Partial capture
06-27 12:41	10m	+6 / +5	M0BEW	-11 / -	3	✓ Full exchange observed
06-27 12:38	10m	+5 / -	SP6M	- / +1	2	✓ Closing fragment
06-27 12:23	10m	+2 / -	SP9UPH	- / -6	3	✓ Closing fragment
06-27 12:22	10m	-1 / -	EC3A	- / -11	2	✓ Closing fragment
06-27 12:17	10m	-6 / -	G3TKT	- / -6	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
172930  -6  705  DD3HB LZ2VQ KN23
172945  +0 2812  SA3CAT DD3HB JO64
173000 +11 2812  DD3HB SA3CAT +01
173015  +0 2812  SA3CAT DD3HB R+01
173030  +9 2812  DD3HB SA3CAT RR73
173045  +0 2812  SA3CAT DD3HB 73
173145 -10 2292  CQ DD3HB JO64
173330 -21 1397  DD3HB DO4TYW +00 (x2)
173500 -14 1396  DD3HB OE5ABL -09 (x2)
173545 -11 1397  CQ DD3HB JO64                         a1
173600  -5 1396  DD3HB LZ2VQ KN23 (x3)

40m

UTC    dB Audio  Message
171415  -4  741  CQ DD3HB JO64 (x4)
171600  -4  740  DD3HB ON4AZM JO11
171615  -3  741  CQ DD3HB JO64 (x5)
172145  +1  741  DJ0MAB DD3HB R-10 (x2)
172230  -5  741  DD3HB DJ0MAB RR73
172245  -8  741  DJ0MAB DD3HB 73

20m

UTC    dB Audio  Message
105415 -24 1807  DD3HB M7YVZ R-08
105545  +2 2288  DD3HB IQ4JO JN63 (x3)
105745  +8  714  DD3HB F1ODM RR73
105815 +11  715  DD3HB F5IXN JN23 (x3)
110415 -15 1781  DD3HB RA1QX KO99 (x4)

10m

UTC    dB Audio  Message
134830  -5 2565  CQ DD3HB JO64 (x9)
135430  -3 2565  SM5MEK DD3HB -07 (x2)
140300 -19 1296  CA6SNT DD3HB JO64 (x2)
141030  -9  792  CQ DD3HB JO64
092315 -16 1204  DD3HB IU0SIB 73

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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