HB10GBT — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Switzerland

Receiver-side FT8 activity involving HB10GBT, decoded by SO8OO in southeastern Poland. 23,706 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 47 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-08.

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 23,706 FT8 messages attributed to HB10GBT as the transmitting token by decoded message structure across 47 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (42%), followed by 20 m (28%) and 80 m (26%). The busiest six-hour window was 00:00-06:00 UTC, containing 38% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

23,706

Messages attributed

UTC dates decoded

1,487

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 6,120 40m · 9,904 20m · 6,539 10m · 1,143

First attributed message: 2026-06-06
Last attributed message: 2026-09-08 03:45 UTC

Observed FT8 message patterns

Attributed sample: 23,706 messages
Active dates: 47 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -17.8 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4,154, moderate (-15 to -9 dB) 7,950, strong (≥ -8 dB) 11,602.

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 HB10GBT in decoded directed-looking exchanges:

TC30VD · Asiatic Turkey ×4 LZ67PP · Bulgaria ×4 HA3GX · Hungary ×3 K1ABC · United States ×2 DL7JLC · Fed. Rep. of Germany CO6NW · Cuba CR60A · Portugal DD5JC · Fed. Rep. of Germany DL4DD · Fed. Rep. of Germany ER35MD · Moldova G3BAM · England JR7HAN · Japan

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.

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	HB10GBT S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 08:56	40m	- / -5	DL4JTH	-5 / -	2	Partial capture
09-08 03:31	40m	-12 / -	UB4HVI	- / -15	5	Partial capture
09-08 03:26	40m	-11 / -	N4IRT	- / -10	6	Partial capture
09-08 03:08	40m	-13 / -	WB8YJF	- / -	4	Partial capture
09-08 03:07	40m	-13 / -	<...>	-7 / -	2	✓ Closing fragment
09-08 03:06	40m	-9 / -12	KS4OT	-10 / +5	3	Partial capture
09-08 03:03	40m	- / -	KS4OT	-6 / -	2	Partial capture
09-08 02:58	40m	-10 / -	R9WCK	- / -7	3	Partial capture
09-08 02:55	40m	-9 / -	W0MHK	- / -9	3	Partial capture
09-08 02:55	40m	-14 / -	<...>	- / -	2	✓ Closing fragment
09-08 02:46	40m	-14 / -	<...>	-12 / -	3	✓ Closing fragment
09-08 02:46	40m	-10 / -3	UR5EPZ	-10 / -11	3	Partial capture
09-08 02:43	40m	-12 / -	RA4FUT	- / -21	2	Partial capture
09-04 19:26	40m	-6 / -	HB9IUI	- / -15	2	Partial capture
09-04 19:00	40m	- / -16	UW5KW	-3 / -	2	Partial capture
09-04 18:59	40m	-6 / -	<...>	+1 / -	4	✓ Closing fragment
09-04 18:52	40m	-8 / -	<...>	+1 / -	2	✓ Closing fragment
09-04 07:36	80m	- / -22	OM8BCD	+2 / -	2	Partial capture
09-04 06:26	80m	-11 / -	<...>	-4 / -	2	✓ Closing fragment
09-04 06:18	80m	-14 / -	<...>	-19 / -	2	✓ Closing fragment
09-04 06:17	80m	-11 / +1	DH5NC	-18 / -	3	Partial capture
09-04 06:01	80m	-11 / -	IK0QBI	- / -9	3	Partial capture
09-04 05:53	80m	- / -	<...>	-20 / -	2	✓ Closing fragment
09-04 05:52	80m	-16 / -	DO9OX	- / -9	2	Partial capture
09-04 05:39	80m	-13 / -	<...>	-8 / -	2	✓ Closing fragment
09-04 05:38	80m	-11 / -2	DO6EN	-10 / -9	2	Partial capture
09-04 05:22	80m	-12 / -	IK2VFR	- / +4	7	Partial capture
09-04 05:15	80m	-11 / -6	SP9MRP	+15 / -4	5	✓ Full exchange observed
09-04 05:11	80m	-6 / -	<...>	+10 / -	3	✓ Closing fragment
09-04 04:59	80m	-4 / -	DO1TEM	- / +2	2	Partial capture
09-04 04:53	80m	-4 / -	EA3ISZ	- / 0	2	Partial capture
09-04 04:46	80m	-6 / -	<...>	- / -	2	✓ Closing fragment
09-04 04:41	80m	-3 / -	DO6THI	- / -10	5	Partial capture
09-04 04:21	80m	-24 / -	<...>	-11 / -	2	✓ Closing fragment
09-04 04:06	80m	-16 / -	<...>	+6 / -	2	✓ Closing fragment
09-04 03:59	80m	-15 / -	WF2A	- / -11	5	Partial capture
09-04 03:51	80m	-11 / -	<...>	+3 / -	2	✓ Closing fragment
09-04 03:51	80m	-1 / 0	SP3HGD	+4 / -14	2	Partial capture
09-04 03:45	80m	+2 / -	K1ABC	-3 / -	2	✓ Closing observed
09-04 03:43	80m	0 / -	<...>	-20 / -	2	✓ Closing fragment
09-04 03:42	80m	+1 / -3	CT2GQA	-18 / -12	3	Partial capture
09-04 03:39	80m	- / +6	YL2TM	-18 / -	2	Partial capture
09-04 03:38	80m	- / -8	IZ5FSO	-6 / -	2	Partial capture
09-04 03:35	80m	- / +5	SP9JCN	+5 / -	2	Partial capture
09-04 03:31	80m	-7 / -	<...>	+4 / -	3	✓ Closing fragment
09-04 03:21	80m	+3 / -	<...>	+12 / -	2	✓ Closing fragment
09-04 03:20	80m	+4 / -1	UR5SG	+14 / +8	3	Partial capture
09-04 03:17	80m	- / +4	SP9UH	+10 / -	2	Partial capture
09-04 03:11	80m	+2 / -	<...>	-4 / -	3	✓ Closing fragment
09-04 03:09	80m	0 / -	OH3DJP	- / -5	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
033615 -16  862  CQ HB10GBT (x11)
074815 -18 1105  HB10GBT ON3CCM R-05
085615  -4 1107  HB10GBT DL4JTH JO60 (x2)
091415  -9  863  HB10GBT DM5KM -18

80m

UTC    dB Audio  Message
072745 -18 1080  CQ HB10GBT (x3)
073630  +3 1080  HB10GBT OM8BCD KN08 (x2)
073715 -19 1080  CQ HB10GBT
073730  -3 1080  HB10GBT <...> RR73
074315 -19 1080  CQ HB10GBT (x5)
074745 -17 1080  IN3EQZ HB10GBT +23
074815 -17 1080  <...> HB10GBT RR73
075015 -20 1081  CQ HB10GBT

20m

UTC    dB Audio  Message
201100 -15 1714  <...> HB10GBT 73
201200 -20 1714  CQ HB10GBT (x4)
201415  -1 1714  HB10GBT IU3BIX JN65
201515  -8 1557  HB10GBT <...> 73
201845 -10 1714  HB10GBT EB4DMH IN80 (x2)
203500 -21 1714  CQ HB10GBT
203630 -12 1714  JA2ORW HB10GBT -18 (x3)
203800 -13 1714  <...> HB10GBT RR73
203830 -24 1714  CQ HB10GBT

10m

UTC    dB Audio  Message
105615 -14  965  PY2GN HB10GBT -18 (x4)
111145 -14  965  EA5ZF HB10GBT R+14
111500 -12  965  HB10GBT DL3MML R-07 (x5)
113800 -10  965  HB10GBT PD8RB JG32 (x3)
114000 -11  965  HB10GBT <...> 73
121500 -14  965  HB10GBT PD0PWH R+07

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.

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