HB9DDZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Switzerland Most frequent locator attributed to this token: JN47

Receiver-side FT8 activity involving HB9DDZ, decoded by SO8OO in southeastern Poland. 54 FT8 messages attributed to this token as transmitter, on 60m, 40m, across 7 UTC dates in the available aggregate history. Observed between 2026-09-04 and 2026-09-13.

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 54 FT8 messages attributed to HB9DDZ as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (56%), followed by 40 m (44%). 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 (94%); the estimated median was -2 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-2 dB

Estimated median S/N

Bands

60m · 30 40m · 24

First attributed message: 2026-09-04
Last attributed message: 2026-09-13 19:52 UTC

Observed FT8 message patterns

Attributed sample: 54 messages
Active dates: 7 UTC dates
Estimated median S/N: -2 dB
Estimated 10th-90th percentile: -8 to +3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 51.

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 HB9DDZ in decoded directed-looking exchanges:

ER1CW · Moldova ×2 DK8HC · Fed. Rep. of Germany EA1IQM · Spain G7VGY/P · England EI3GG/P · Ireland VE1YX · Canada Z68PX · Republic of Kosovo

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 HB9DDZ

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: JN47 · 39 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 975 km (approx.)
Last such locator decoded: 2026-09-13 19:49 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	HB9DDZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 19:50	40m	-5 / -12	DK8HC	-8 / -3	8	✓ Full exchange observed
09-13 19:50	40m	- / -	PD0LBY	-8 / -	2	Partial capture
09-13 19:48	40m	+1 / -	G7VGY/P	-23 / -11	5	✓ Closing observed
09-11 21:11	60m	0 / -	VE1YX	- / -4	4	✓ Closing fragment
09-11 19:48	40m	-2 / -	EA1IQM	- / -3	6	✓ Closing fragment
09-10 19:43	60m	+4 / -	EI3GG/P	- / -12	3	✓ Closing fragment
09-09 19:46	40m	-7 / -	EW6DM/P	- / -	10	Partial capture
09-09 18:40	60m	+6 / -	<...>	- / +10	2	Partial capture
09-06 19:49	60m	+2 / -16	BH8ESR	-18 / -	8	Partial capture
09-06 19:41	60m	- / 0	SP8BJU	+4 / -	2	Partial capture
09-06 19:37	60m	-3 / -1	Z68PX	-3 / -16	10	✓ Full exchange observed
09-05 19:40	60m	- / -	HB9AWS	-11 / -	3	Partial capture
09-05 19:39	60m	+1 / -3	ER1CW	-8 / -5	5	✓ Full exchange observed
09-05 19:27	60m	-3 / -	IK2VFR/P	- / -	3	Partial capture
09-04 20:05	40m	-8 / -	RI1FJL	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
194845  +3 2383  G7VGY/P HB9DDZ JN47 (x3)
195000 -23 2130  HB9DDZ G7VGY/P RR73
195015  +2 2383  G7VGY/P HB9DDZ 73
195030  -3 1534  HB9DDZ PD0LBY JO22
195030  -4  598  HB9DDZ DK8HC JO42 (x3)
195200 -12 1534  HB9DDZ PD0LBY JO22
195200 -11  599  HB9DDZ DK8HC JO42
195215  +0 2383  DK8HC HB9DDZ -03
195230  -4  598  HB9DDZ DK8HC R-12
195245 -10 2384  DK8HC HB9DDZ RR73
195300  -6  598  HB9DDZ DK8HC 73

60m

UTC    dB Audio  Message
195145 -18 2039  HB9DDZ BH8ESR -16
195145  +7 2236  BH8ESR HB9DDZ JN47 (x3)
184045  +6 2530  <...> HB9DDZ JN47
184100  +3 1262  HB9DDZ SM7/DL5BTE -01
184115  +5 2530  <...> HB9DDZ R+10
194330  +7 1037  EI3GG/P HB9DDZ JN47 (x3)
194515  -5 1732  HB9DDZ TA6B KN81
211145  +0 2180  VE1YX HB9DDZ JN47 (x4)

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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