IU4HNR — 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: Italy Most frequent locator attributed to this token: JN54

Receiver-side FT8 activity involving IU4HNR, decoded by SO8OO in southeastern Poland. 89 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 7 UTC dates in the available aggregate history. Observed between 2026-07-29 and 2026-10-28.

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 89 FT8 messages attributed to IU4HNR as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (51%), followed by 20 m (29%) and 10 m (20%). Several six-hour UTC windows tied for the largest share (46%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

40m · 45 20m · 26 10m · 18

First attributed message: 2026-07-29
Last attributed message: 2026-10-28 17:27 UTC

Observed FT8 message patterns

Attributed sample: 89 messages
Active dates: 7 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -15 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 41, strong (≥ -8 dB) 42.

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 IU4HNR in decoded directed-looking exchanges:

JI4WAO · Japan RX9ABI · Asiatic Russia DA0M · Fed. Rep. of Germany EX7CQ · Kyrgyzstan TK5NJ · Corsica

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 IU4HNR

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: JN54 · 39 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,013 km (approx.)
Last such locator decoded: 2026-10-28 17:20 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	IU4HNR S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-28 17:25	40m	-1 / -	R3DFU	- / -21	3	Partial capture
10-28 17:21	40m	0 / -	DA0M	- / -3	2	✓ Closing fragment
10-07 14:47	40m	-1 / -19	EX7CQ	-12 / -11	12	✓ Full exchange observed
10-07 14:43	40m	-1 / -	TK5NJ	-14 / -	4	✓ Closing observed
08-27 09:48	10m	-6 / -	RX9ABI	- / -13	2	✓ Closing fragment
08-27 09:42	10m	-11 / -	JI4WAO	- / -17	2	✓ Closing fragment
08-10 05:45	20m	-4 / -	WL7SJ	- / -	10	Partial capture
08-09 07:25	20m	-4 / -	MM7CEH	- / -18	10	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
144845  +0 1565  EX7CQ IU4HNR JN54 (x3)
145000 -11 1301  IU4HNR EX7CQ -19
145015  -4 1564  EX7CQ IU4HNR R-11
145030 -15 1301  IU4HNR EX7CQ RR73
145045  +0 1564  EX7CQ IU4HNR 73
145130 -11 1301  IU4HNR EX7CQ RR73 (x2)
172045  +0 1565  CQ IU4HNR JN54
172115  -1 1566  DA0M IU4HNR -03 (x2)
172515  -3 1566  R3DFU IU4HNR -21 (x3)

10m

UTC    dB Audio  Message
094030 -12 1954  CQ IU4HNR JN54 (x3)
094200 -12 1953  JI4WAO IU4HNR -17 (x2)
094400 -10 1953  CQ IU4HNR JN54 (x8)
094800  -7 1953  RX9ABI IU4HNR -13 (x2)

20m

UTC    dB Audio  Message
072845  -4 1940  MM7CEH IU4HNR -18 (x4)
054530 -12 1939  WL7SJ IU4HNR JN54 (x10)
055430  -3 1939  CQ VK IU4HNR JN54

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

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