HF43ZW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland

Receiver-side FT8 activity involving HF43ZW, decoded by SO8OO in southeastern Poland. 75 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-09 and 2026-07-13.

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 75 FT8 messages attributed to HF43ZW as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (71%), followed by 20 m (29%). Several six-hour UTC windows tied for the largest share (71%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (85%); the estimated median was -20 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-20 dB

Estimated median S/N

Bands

40m · 53 20m · 22

First attributed message: 2026-07-09
Last attributed message: 2026-07-13 13:56 UTC

Observed FT8 message patterns

Attributed sample: 75 messages
Active dates: 5 UTC dates
Estimated median S/N: -20 dB
Estimated 10th-90th percentile: -24 to -14 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 64, moderate (-15 to -9 dB) 10, strong (≥ -8 dB) 1.

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 HF43ZW in decoded directed-looking exchanges:

LZ01MIKU · Bulgaria ×4 II4JAFL · Italy ×2 CS5AIRA · Portugal IS0/IK2YCW · Sardinia UD8D/M · Asiatic 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.

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	HF43ZW S/N	Counterpart	Counterpart S/N	Msgs	Capture
07-13 13:47	20m	-7 / -	<...>	-20 / -	2	✓ Closing fragment
07-12 18:26	40m	- / -	<...>	-14 / -	2	✓ Closing fragment
07-12 06:33	40m	- / -	<...>	-22 / -	2	✓ Closing fragment
07-11 08:02	20m	- / -	HG8LXL	-4 / -	4	Partial capture
07-11 06:31	20m	- / -12	DL8TV	-4 / -	4	Partial capture
07-11 05:57	20m	- / -	F4BYA	+1 / -	3	Partial capture
07-11 05:57	20m	- / -	RU5A	-10 / -	4	Partial capture
07-10 19:11	40m	-18 / -	<...>	-7 / -	2	✓ Closing fragment
07-10 19:01	40m	- / -	PE1NPS	-8 / -	4	Partial capture
07-10 19:01	40m	-13 / -	<...>	-2 / -	2	✓ Closing fragment
07-10 12:48	20m	- / -12	ON7DY	-9 / -	3	Partial capture
07-09 20:48	40m	-23 / -	<...>	-7 / -	2	✓ Closing fragment
07-09 20:30	40m	-17 / -	<...>	-14 / -	5	✓ Closing fragment
07-09 20:21	40m	- / -	<...>	-8 / -	2	✓ Closing fragment
07-09 19:52	40m	-20 / -	<...>	-8 / -	3	✓ Closing fragment
07-09 19:32	40m	-22 / -	<...>	-15 / -	2	✓ Closing fragment
07-09 11:18	20m	- / -	HG8LXL	-2 / -	3	Partial capture
07-09 11:03	20m	- / -	9A3AUH	-11 / -	3	Partial capture
07-09 08:42	20m	-16 / -	<...>	- / -	2	✓ Closing fragment
07-09 07:57	20m	- / -	<...>	-12 / -	2	✓ Closing fragment
07-09 07:46	20m	- / -	<...>	-16 / -	4	✓ Closing fragment
07-09 06:03	20m	- / -	I1RJP	+5 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
160800 -17 1764  HF43ZW CS5AIRA RR73
161100 -14 1764  HF43ZW <...> 73 (x2)
134545 -14 1433  CQ HF43ZW (x2)
134715  -7 1433  <...> HF43ZW RR73
134730 -20 1433  HF43ZW <...> 73
134745 -14 1433  CQ HF43ZW
135215 -21 1434  <...> HF43ZW RR73
135315 -16 1433  CQ HF43ZW (x5)
140930 -23 1434  HF43ZW <...> 73

40m

UTC    dB Audio  Message
181045 -21 1726  CQ HF43ZW
185715 -20 1726  II4JAFL HF43ZW RR73
185845 -24 1726  CQ HF43ZW (x6)
063330 -22 1727  HF43ZW <...> 73 (x5)
183415 -22 1316  CQ HF43ZW
184800  -5 1289  HF43ZW <...> 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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