HB9HDK — 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: Switzerland Most frequent locator attributed to this token: JN37

Receiver-side FT8 activity involving HB9HDK, decoded by SO8OO in southeastern Poland. 179 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 36 UTC dates in the available aggregate history. Observed between 2026-06-07 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 179 FT8 messages attributed to HB9HDK as the transmitting token by decoded message structure across 36 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (47%), followed by 20 m (22%) and 60 m (20%). Most decodes (94%) fell within the six-hour window 05:00-11:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

179

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

80m · 4 60m · 36 40m · 85 20m · 39 10m · 15

First attributed message: 2026-06-07
Last attributed message: 2026-10-22 07:24 UTC

Observed FT8 message patterns

Attributed sample: 179 messages
Active dates: 36 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -21 to -10 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 88, moderate (-15 to -9 dB) 80, strong (≥ -8 dB) 11.

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 HB9HDK in decoded directed-looking exchanges:

SP1MGM · Poland ×3 EC5M · Spain ×2 DG7CF · Fed. Rep. of Germany ×2 DL7ARV · Fed. Rep. of Germany ×2 G0ABI · England ×2 GJ0KYZ · Jersey ×2 SP3HCA · Poland ×2 G0BLB · England ×2 E75W · Bosnia-Herzegovina TL8GD · Central African Republic CT3MD · Madeira Islands E70SZ · Bosnia-Herzegovina

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 HB9HDK

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: JN37 · 110 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,116 km (approx.)
Last such locator decoded: 2026-10-22 07:11 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	HB9HDK S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-22 09:38	40m	- / -6	SN0EG	-10 / -	3	✓ Closing fragment
10-22 08:51	40m	- / -11	F4GUK	-8 / -	2	Partial capture
10-22 07:22	40m	-12 / -	M9SDT	- / -7	2	Partial capture
10-22 07:12	40m	- / -9	G3TKT	-12 / -	2	Partial capture
10-22 06:59	40m	- / -	LZ2INP	+4 / -	2	Partial capture
10-21 12:32	10m	- / -7	TL8GD	-9 / -	4	✓ Closing fragment
10-21 08:51	40m	- / +2	DF5DY	-7 / -	3	✓ Closing fragment
10-21 08:47	40m	- / -15	OZ1SMB	-9 / -	3	✓ Closing fragment
10-21 08:44	40m	- / -11	OK2CNI	-3 / -	3	✓ Closing fragment
10-21 08:39	40m	- / -	IK4LZH	-6 / -	2	✓ Closing fragment
10-21 08:29	40m	- / -	SP3SBY	-15 / -	3	Partial capture
10-21 08:21	40m	- / -	DL4DW	0 / -	4	Partial capture
10-21 08:12	40m	- / -	IK4LZH	-8 / -	4	Partial capture
10-21 06:29	60m	-16 / -4	DG9LBD	-7 / -10	5	✓ Full exchange observed
10-21 06:23	60m	-14 / -19	OH1LA	-20 / -10	3	✓ Full exchange observed
10-21 06:21	60m	-16 / -22	SP1MGM	-10 / -	4	✓ Closing observed
10-21 05:57	80m	- / -18	PA0MUS	-15 / -	5	✓ Closing fragment
10-21 05:52	80m	- / -	DL6UM	-1 / -	4	Partial capture
10-21 05:51	80m	- / -19	DO1ID	+5 / -	2	✓ Closing fragment
10-20 09:36	40m	- / +1	S55OO	-9 / -	2	✓ Closing fragment
10-20 09:31	40m	- / -	IU3VGK	-22 / -	2	Partial capture
10-19 08:58	40m	- / +3	DL4YCD	-14 / -	4	✓ Closing fragment
10-19 08:49	40m	- / -4	F1PBZ	-6 / -	2	✓ Closing fragment
10-19 08:23	60m	- / -15	DF0TZ	-8 / -	2	✓ Closing fragment
10-18 07:33	40m	- / -11	PA3T	-8 / -	2	✓ Closing fragment
10-18 07:23	40m	- / -1	IZ5RKH	-6 / -	2	Partial capture
10-18 07:14	40m	- / -14	SP6TT	-4 / -	4	✓ Closing fragment
10-18 07:08	40m	- / -1	GJ0KYZ	-6 / -	9	Partial capture
10-18 07:05	40m	- / -24	PD7LB	-16 / -	5	✓ Closing fragment
10-18 07:04	40m	- / -2	GJ0KYZ	-2 / -	3	Partial capture
10-18 06:42	60m	- / -9	DG7AK	-12 / -	3	✓ Closing fragment
10-18 06:36	60m	- / -13	G0ABI	-2 / -	2	✓ Closing fragment
10-18 06:23	60m	- / -	EB5AFK	-12 / -	5	Partial capture
10-18 06:10	80m	- / -17	DO1BOC	-18 / -	3	✓ Closing fragment
10-18 06:04	80m	- / -9	DL1BTX	-4 / -	2	✓ Closing fragment
10-18 05:48	80m	- / -17	MI0OBC	-14 / -	2	✓ Closing fragment
10-18 05:46	80m	- / -2	DF7QR	-8 / -	3	Partial capture
10-18 05:44	80m	- / -11	DH0GSU	0 / -	2	✓ Closing fragment
10-18 05:36	80m	- / -2	ON8WR	-1 / -	2	Partial capture
10-16 09:44	40m	- / -	SP9IML	-16 / -	2	Partial capture
10-15 06:38	40m	- / -18	US2YW	+12 / -	2	Partial capture
10-15 06:36	40m	-20 / -8	IZ4JMA	-9 / -	4	✓ Closing observed
10-15 06:29	40m	-18 / -11	SP3HCA	-4 / +2	4	✓ Full exchange observed
10-15 06:19	40m	- / -	US2YW	+5 / -	3	Partial capture
10-15 05:56	60m	-16 / -	EA5HM	- / -	2	✓ Closing fragment
10-15 05:55	60m	-10 / -7	SP2SGZ	-10 / -14	5	Partial capture
10-15 05:52	60m	-14 / -	EC3A	-22 / -10	3	✓ Closing observed
10-15 05:46	80m	- / -12	F6FTB	-6 / -	2	✓ Closing fragment
10-15 05:43	80m	- / -	F6FTB	-4 / -	2	Partial capture
10-15 05:39	80m	- / -21	IQ4JO	+1 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
065845 -12  994  CQ HB9HDK JN37
065900  +4 2648  HB9HDK LZ2INP KN34 (x2)
071100 -13  965  CQ HB9HDK JN37                        a1 (x2)
071215 -13  965  HB9HDK G3TKT IO92 (x2)
072200 -10  651  M9SDT HB9HDK -07 (x2)
085115  -7 2827  HB9HDK F4GUK JN18 (x2)
093030  +0 2584  HB9HDK HA3HZ JN96
093815  -5 1136  HB9HDK SN0EG JO73 (x3)

10m

UTC    dB Audio  Message
120900 -22 1580  HB9HDK <...> -10
135730 -15 2484  HB9HDK IU0VOG JN61 (x2)
082315 -20 1048  CQ HB9HDK JN37                        a1
124430 -14 2249  HB9HDK E75W RR73
125515 -18 1346  CQ HB9HDK JN37
104645 -15  996  HB9HDK II7MGBT -07
083530 -16 1112  CQ HB9HDK JN37
123200 -13  923  HB9HDK TL8GD -07 (x4)

60m

UTC    dB Audio  Message
062545 -11 1054  CQ HB9HDK JN37 (x7)
062945  -6 1423  HB9HDK DG9LBD JO54
063000 -18 1054  DG9LBD HB9HDK -10
063015  -6 1422  HB9HDK DG9LBD R-04
063030 -14 1054  DG9LBD HB9HDK RR73
063045 -10 1423  HB9HDK DG9LBD 73
063130 -16 1054  CQ HB9HDK JN37 (x3)

80m

UTC    dB Audio  Message
060715 -24 1260  HB9HDK IK4OLQ -08
061015 -18 1106  HB9HDK DO1BOC -17 (x3)
055130  +4  238  HB9HDK DO1ID -19 (x2)
055200  +5  789  HB9HDK DL6UM JO60 (x4)
055730 -13 1641  HB9HDK PA0MUS JO22 (x5)

20m

UTC    dB Audio  Message
081500  -9 1104  <...> HB9HDK JN37
081615 -11 1870  HB9HDK II7MGMU -09
063415  +8 1755  HB9HDK IR7MGGC +00
064515  +7 2715  HB9HDK F4BYA JN19 (x4)
115945  -9 1192  HB9HDK PA2KV JO33
120515  -1  932  HB9HDK F5MXH JN07 (x2)
070445  -9  943  HB9HDK EA4GA -14
084545  -2 1177  <...> HB9HDK JN37
085700 -11 2221  HB9HDK II7MGBR -03
151645  -4 1689  HB9HDK F5OYA/P +06
152000 -12 1145  HB9HDK EA7KLL RR73

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

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee