F5HDN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN05

Receiver-side FT8 activity involving F5HDN, decoded by SO8OO in southeastern Poland. 111 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 13 UTC dates in the available aggregate history. Observed between 2026-06-08 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 111 FT8 messages attributed to F5HDN as the transmitting token by decoded message structure across 13 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (50%), followed by 10 m (37%) and 40 m (13%). Several six-hour UTC windows tied for the largest share (66%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

111

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

40m · 14 20m · 56 10m · 41

First attributed message: 2026-06-08
Last attributed message: 2026-09-08 09:22 UTC

Observed FT8 message patterns

Attributed sample: 111 messages
Active dates: 13 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -18 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 25, moderate (-15 to -9 dB) 48, strong (≥ -8 dB) 38.

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 F5HDN in decoded directed-looking exchanges:

SQ7FBP · Poland UR5WCA · Ukraine CR2WWA · Azores DH5BM · Fed. Rep. of Germany EU4U · Belarus F4PCM · France F5IXN · France G3MIK · England HA1BF · Hungary IK4JPP · Italy LZ1ZF · Bulgaria ON1JP · Belgium

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 F5HDN

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: JN05 · 48 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,626 km (approx.)
Last such locator decoded: 2026-09-08 09:22 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	F5HDN S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 09:26	40m	- / +5	DA1ST	-8 / -	3	✓ Closing fragment
09-08 09:22	40m	- / -4	DL9KM	-8 / -	3	✓ Closing fragment
09-08 09:16	40m	-18 / -	PI4TX	-21 / -	2	✓ Closing observed
08-29 07:35	20m	-2 / -	Z62NS	- / -	2	Partial capture
08-17 14:12	20m	-7 / -	UN8DSW	- / -18	3	Partial capture
08-17 14:09	20m	-8 / -	VK2ZR	- / -	2	Partial capture
07-15 13:58	10m	-15 / -	SQ7FBP	- / -3	2	✓ Closing fragment
07-15 13:56	10m	-17 / -	UR5WCA	- / -2	2	✓ Closing fragment
07-10 05:51	40m	- / -	ON5HE	-7 / -	2	✓ Closing fragment
07-10 05:35	40m	- / -	YO3GNF	-12 / -	2	Partial capture
07-10 05:32	40m	- / -13	LZ2INP	-13 / -	2	Partial capture
07-10 05:28	40m	- / -12	OE8RAK	-18 / -	2	Partial capture
07-09 16:12	40m	- / +6	HB9CEX	-10 / -	2	✓ Closing fragment
07-06 05:38	20m	- / -8	F4PCM	-7 / -	3	✓ Closing fragment
07-03 13:32	20m	-9 / -	HA1BF	- / -6	4	✓ Closing fragment
07-03 13:30	20m	-10 / -	CR2WWA	- / -9	2	✓ Closing fragment
07-03 13:28	20m	-6 / -	TA2ANK	- / -	2	Partial capture
07-03 13:26	20m	-13 / -11	LZ1ZF	-6 / -14	5	✓ Full exchange observed
07-03 13:21	20m	-8 / -11	G3MIK	-22 / -11	8	✓ Full exchange observed
07-03 13:16	20m	-16 / -6	PD1HPB	-22 / -	2	Partial capture
06-28 13:31	10m	-14 / -	DJ0MAB	-17 / -	4	Partial capture
06-28 13:31	10m	-15 / -	DO8KHP	- / +3	3	Partial capture
06-28 13:17	10m	-24 / -	EA1IOK	- / -	2	Partial capture
06-26 06:58	20m	-14 / -	ON1JP	- / -5	3	✓ Closing fragment
06-26 06:52	20m	-9 / +7	DK1TUX	-9 / +5	2	Partial capture
06-26 06:48	20m	-12 / -	DH5BM	-5 / -	4	✓ Closing observed
06-26 06:45	20m	- / -	F5IXN	-18 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
053545 -11 2599  F5HDN YO3GNF KN34 (x3)
055115  -5  654  F5HDN ON5HE R+11 (x2)
091630 -18 1266  PI4TX F5HDN +22
091715 -21 2040  F5HDN PI4TX 73
092230 -13  774  CQ F5HDN JN05
092245  -7 1725  F5HDN DL9KM JN68 (x3)
092515 -15  775  F5HDN DK7JR R+08
092615 -11  774  F5HDN DA1ST JO41 (x3)

20m

UTC    dB Audio  Message
053700 -20 1043  DL9UXF F5HDN +00
053845  -7 1043  F5HDN F4PCM JN23 (x3)
054615 -17 1044  VK3JMA F5HDN JN05
153730 -16 2521  VA3SF F5HDN JN05
140915 -13 1759  VK2ZR F5HDN JN05 (x2)
141130  +5  599  F4HTA F5HDN JN05
141200  +0  599  UN8DSW F5HDN JN05 (x3)
141330 -14 2111  RA2FU F5HDN JN05
073545  -3 1938  Z62NS F5HDN JN05 (x2)

10m

UTC    dB Audio  Message
133200 -15 1896  DO8KHP F5HDN +03
133215 -19 1896  F5HDN DJ0MAB JN49
133230 -12 1897  DO8KHP F5HDN +03
133245 -17 1896  F5HDN DJ0MAB JN49
133330 -14 1896  DJ0MAB F5HDN +12
133430 -16 1896  CQ F5HDN JN05 (x3)
135445 -14 1215  OM3DX F5HDN +22
135615 -18 1215  UR5WCA F5HDN -02 (x2)
135745 -15 1215  CQ F5HDN JN05
135815 -12 1215  SQ7FBP F5HDN -03 (x2)
151900 -11 2254  OH1NHX F5HDN JN05

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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