KF4YHC — 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: United States Most frequent locator attributed to this token: FM18

Receiver-side FT8 activity involving KF4YHC, decoded by SO8OO in southeastern Poland. 65 FT8 messages attributed to this token as transmitter, on 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-06-16.

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 65 FT8 messages attributed to KF4YHC as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (74%); the estimated median was -4 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-4 dB

Estimated median S/N

Bands

20m · 65

First attributed message: 2026-06-07
Last attributed message: 2026-06-16 03:04 UTC

Observed FT8 message patterns

Attributed sample: 65 messages
Active dates: 6 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -23 to +5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 17, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 48.

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 KF4YHC in decoded directed-looking exchanges:

W3LL · United States CT2HEX · Portugal DL8WEM · Fed. Rep. of Germany IZ2ACM · Italy PA2RO · Netherlands YO9IAB · Romania G0AZH · England G3TKT · England F1PBZ · France F5PBG · France K1RTA · United States ON8DM · Belgium

Most frequent locator attributed to KF4YHC

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: FM18 · 35 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,390 km (approx.)
Last such locator decoded: 2026-06-16 03:02 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	KF4YHC S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-06 03:31	80m	- / -	EA1IOK	-10 / -	3	Partial capture
11-04 02:21	80m	- / -12	F1PBZ	+11 / -	5	✓ Closing fragment
10-29 03:24	80m	- / -19	UT7EV	+5 / -	3	✓ Closing fragment
10-29 03:19	80m	- / -11	F5PBG	-9 / -	3	✓ Closing fragment
10-20 01:09	60m	- / -18	G3TKT	-4 / -	4	✓ Closing fragment
10-19 03:02	40m	- / -17	CT2HEX	-17 / -	3	✓ Closing fragment
10-19 02:02	40m	- / -10	P4/WE9V	+1 / -	2	Partial capture
10-02 00:11	40m	- / -	PD1HBL	-6 / -	8	Partial capture
09-30 02:22	80m	- / -	HB9CXZ	+10 / -	6	Partial capture
09-29 01:05	160m	- / -	W3LL	-17 / -	3	✓ Closing fragment
09-27 04:00	80m	- / -17	ON8DM	+7 / -	3	✓ Closing fragment
09-07 05:23	40m	- / -	F6DZU	+9 / -	2	Partial capture
09-07 05:19	40m	- / -9	IN3LTL	+1 / -	5	Partial capture
09-07 04:53	40m	- / -12	PA2RO	-12 / -	2	✓ Closing fragment
09-07 04:52	40m	- / -7	DL8WEM	+3 / -	3	✓ Closing fragment
09-04 04:27	40m	- / -	IZ2QPP	+3 / -	4	Partial capture
08-23 04:03	40m	- / -5	IZ2ACM	+7 / -	3	✓ Closing fragment
08-23 03:50	40m	- / -13	YO9IAB	+2 / -	6	✓ Closing fragment
08-20 22:51	20m	- / -10	N4ILE	-18 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
032045  -4 2170  KF4YHC F5PBG 73
032430  +4 1994  KF4YHC UT7EV -19 (x3)
032800 -11  491  KF4YHC K1RTA RR73
022115 +11  455  KF4YHC F1PBZ -12 (x5)
023230 -13  331  KF4YHC N1YXE -11
032945  +8 2528  KF4YHC F4EGM JN29
033145 -14  701  KF4YHC EA1IOK IN62 (x3)

40m

UTC    dB Audio  Message
052330  +8  472  KF4YHC F6DZU IN94
001115  -5 2212  KF4YHC PD1HBL JO21 (x8)
020200  +0 1756  KF4YHC P4/WE9V -10 (x2)
030245 -16 1649  KF4YHC CT2HEX IM58 (x3)
031845  -7 1484  KF4YHC F5OZK JN23

60m

UTC    dB Audio  Message
010915  -4  818  KF4YHC G3TKT IO92
010915  -8  676  KF4YHC G0AZH 73
010945  -3  818  KF4YHC G3TKT IO92 (x3)

160m

UTC    dB Audio  Message
010545 -24 1290  KF4YHC W3LL FM19 (x3)

20m

UTC    dB Audio  Message
225115 -16 2142  KF4YHC N4ILE EL96 (x2)

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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