HB9RTW — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving HB9RTW, decoded by SO8OO in southeastern Poland. 37 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-31.

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 37 FT8 messages attributed to HB9RTW as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (89%), followed by 80 m (5%) and 40 m (5%). Several six-hour UTC windows tied for the largest share (70%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

80m · 2 40m · 2 20m · 33

First attributed message: 2026-06-06
Last attributed message: 2026-08-31 17:01 UTC

Observed FT8 message patterns

Attributed sample: 37 messages
Active dates: 8 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -22 to -9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 14, moderate (-15 to -9 dB) 20, strong (≥ -8 dB) 3.

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 HB9RTW in decoded directed-looking exchanges:

9A5E · Croatia DF5EI · Fed. Rep. of Germany EA5KV · Spain F4HAB/P · France I8OHQ · Italy LZ1FBI · Bulgaria MM3RCR · Scotland OH2MA · Finland PA3CPS · Netherlands SV2HTW · Greece UF4S · European Russia

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 HB9RTW

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 · 24 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 975 km (approx.)
Last such locator decoded: 2026-08-31 17:01 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	HB9RTW S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-29 08:39	20m	-11 / -	OH2MA	-6 / -	2	✓ Closing observed
08-29 08:36	20m	- / -11	UF4S	-3 / -	2	✓ Closing fragment
08-29 08:31	20m	-19 / -	HA7TM/P	- / -16	2	Partial capture
08-29 08:09	20m	-10 / -	<...>	- / -14	3	Partial capture
08-29 08:08	20m	-15 / -14	II7MGBT	-6 / -13	3	Partial capture
08-29 08:04	20m	-14 / -	AO5FSB	- / -	2	Partial capture
08-29 07:58	20m	-15 / -13	LZ1FBI	0 / -	3	✓ Closing observed
08-29 07:54	20m	-10 / -	OK2AA	- / -	3	Partial capture
08-29 07:45	20m	-12 / -	Z62NS	- / -	6	Partial capture
08-27 10:19	20m	- / -7	9A5E	-1 / -	2	✓ Closing fragment
08-27 08:34	20m	-20 / -	SV2HTW	- / -13	3	✓ Closing fragment
08-27 08:22	20m	- / -18	I8OHQ	+5 / -	2	✓ Closing fragment
07-12 11:20	20m	- / -19	<...>	-2 / -	2	Partial capture
07-12 10:51	20m	- / -7	DF5EI	-11 / -	2	✓ Closing fragment
07-07 05:59	20m	-12 / -	DL2JB	-3 / +9	4	Partial capture
07-07 05:58	20m	- / -18	PA3CPS	+8 / -	3	✓ Closing fragment
07-02 18:08	20m	- / -7	PD1HPB	-12 / -	2	Partial capture
07-02 17:56	20m	- / -11	RU4SS	-4 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
080845  -8 2103  HB9RTW II7MGBT -14
080900 -11 2666  <...> HB9RTW R-14
080915  -4 2104  HB9RTW II7MGBT -14
080930 -10 2666  <...> HB9RTW R-13 (x2)
081030 -15 2666  <II7MGBT> HB9RTW R-13
082845 -15 2418  Z62NS HB9RTW JN47
083130 -23 2417  HA7TM/P HB9RTW JN47 (x2)
083630  +1 1290  HB9RTW UF4S -11 (x2)
083930  -6 1842  HB9RTW OH2MA RR73
083945 -11 2501  OH2MA HB9RTW 73
164900 -16 2610  9M2DGA HB9RTW JN47
170145 -16 2446  EX8BT HB9RTW JN47

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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