US5CDH — 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: Ukraine Most frequent locator attributed to this token: KN69

Receiver-side FT8 activity involving US5CDH, decoded by SO8OO in southeastern Poland. 110 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 25 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-11-02.

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 110 FT8 messages attributed to US5CDH as the transmitting token by decoded message structure across 25 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (69%), followed by 20 m (15%) and 80 m (14%). Several six-hour UTC windows tied for the largest share (95%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (78%); the estimated median was -2 dB.

Overview

110

Messages attributed

UTC dates decoded

Active 15-min windows

-2 dB

Estimated median S/N

Bands

80m · 15 40m · 76 20m · 16 10m · 3

First attributed message: 2026-06-13
Last attributed message: 2026-11-02 21:14 UTC

Observed FT8 message patterns

Attributed sample: 110 messages
Active dates: 25 UTC dates
Estimated median S/N: -2 dB
Estimated 10th-90th percentile: -12 to +7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 18, strong (≥ -8 dB) 86.

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 US5CDH in decoded directed-looking exchanges:

AA3B · United States JH8SIT · Japan AM5CV · Spain DD3ZZ · Fed. Rep. of Germany DL9FFM · Fed. Rep. of Germany EA3HMM · Spain G4ZZL · England HB9ELE · Switzerland HS0ZOY · Thailand II5GG · Italy JA4FKX · Japan JH5LCN · Japan

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 US5CDH

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: KN69 · 56 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 807 km (approx.)
Last such locator decoded: 2026-11-02 21:12 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	US5CDH S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-03 21:19	40m	- / -15	IK4TVP	-14 / -	3	Partial capture
11-02 21:12	40m	-21 / -	DL9FFM	- / -	2	✓ Closing fragment
11-02 20:54	40m	- / -6	9K2YM	-12 / -	2	Partial capture
10-28 21:51	40m	- / -15	G8KHF	0 / -	2	Partial capture
10-23 20:26	80m	+10 / -4	DB100FT	-2 / -24	3	Partial capture
10-14 17:52	40m	+4 / -2	G4ZZL	-12 / -13	5	✓ Full exchange observed
10-09 21:27	80m	- / -13	DO5HOK	-6 / -	2	✓ Closing fragment
10-09 21:24	80m	-6 / -9	AO5CV	-5 / -10	7	✓ Full exchange observed
10-09 21:23	80m	-1 / -	J48S	- / -15	3	✓ Closing fragment
10-09 21:21	80m	-1 / -	TA4SSK	- / -2	2	✓ Closing fragment
10-09 21:15	40m	-10 / -2	EA3HMM	-2 / -7	4	✓ Full exchange observed
10-09 21:14	40m	-5 / -16	OE5KBO	+2 / -	3	✓ Closing observed
10-09 21:09	40m	-12 / -	7Z1OO	- / -	2	Partial capture
10-09 21:04	40m	-12 / -	7Z1OO	- / -	3	Partial capture
10-04 20:02	40m	0 / -3	DD3ZZ	-1 / -12	6	✓ Full exchange observed
10-04 19:49	40m	- / -8	OE5ABL	-16 / -	3	Partial capture
10-04 19:49	40m	- / -	F6FHZ	-18 / -	2	Partial capture
10-04 19:48	40m	-6 / -	HS0ZOY	- / -15	3	✓ Closing fragment
10-04 19:23	40m	0 / -	II5GG	- / -	2	✓ Closing fragment
10-04 19:20	40m	-2 / -	JH5LCN	- / -	2	✓ Closing fragment
09-24 19:27	40m	-12 / +1	SD5X	+3 / -3	6	✓ Full exchange observed
09-20 18:51	40m	+1 / +6	HA7EC	-1 / -	7	Partial capture
09-20 18:47	40m	+5 / -	JA4FKX	-5 / 0	4	✓ Closing observed
09-20 18:46	40m	+7 / -9	M9RDX	+5 / -	4	✓ Closing observed
09-20 18:42	40m	+4 / +2	HB9ELE	+10 / +5	5	✓ Full exchange observed
09-20 18:41	40m	- / -	PE1NPS	-12 / -	2	Partial capture
09-20 18:39	40m	+6 / -	SQ100PKP	- / -4	2	Partial capture
09-20 18:37	40m	+6 / -4	UT7NI	+3 / +9	4	✓ Full exchange observed
08-28 19:27	20m	-2 / -12	AA3B	-3 / -11	5	✓ Full exchange observed
08-18 20:53	80m	- / -	DF6QN	+2 / -	2	Partial capture
08-18 20:52	80m	+16 / -10	EN35UKR	+6 / +8	3	Partial capture
08-10 21:04	20m	-4 / -	JH8SIT	- / 0	2	✓ Closing fragment
08-10 21:02	20m	- / -	DF5AH	+1 / -	3	Partial capture
08-10 21:00	20m	0 / -	VE3ARF	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
175315  +6 1133  G4ZZL US5CDH R-13 (x2)
185745 -10  306  VU2XZ US5CDH KN69
201730  +5  620  US5CDH CT9/DF7EE -03
175100  -2 1146  <...> US5CDH KN69
215130  +1  707  US5CDH G8KHF -15 (x2)
205400 -11  623  US5CDH 9K2YM -06 (x2)
211245 -20 1145  DL9FFM US5CDH KN69 (x2)
211800  -8  650  US5CDH ON1AEY +01
211900 -12 1217  US5CDH IK4TVP -15 (x3)

80m

UTC    dB Audio  Message
212345  +0 1097  J48S US5CDH R-15 (x2)
212445  -9 1097  AO5CV US5CDH KN69
212500  -4  725  US5CDH AO5CV -09
212515  -8 1097  AO5CV US5CDH KN69
212530  -7  725  US5CDH AO5CV -05
212545  -6 1097  AO5CV US5CDH R-10
212600  -5  725  US5CDH AO5CV RR73
212615  -2 1097  AO5CV US5CDH 73
212745  -4  808  US5CDH DO5HOK -13 (x2)
181345  +6 1097  DK6WS US5CDH KN69
202600  +9 1091  DB100FT US5CDH KN69
202615  -2 1092  US5CDH DB100FT -04
202630 +10 1091  DB100FT US5CDH R-24

20m

UTC    dB Audio  Message
210000  -3  450  VE3ARF US5CDH KN69 (x2)
210200  +0  450  CQ US5CDH KN69
210215  +1 2967  US5CDH DF5AH JO41 (x3)
210400  -5  450  JH8SIT US5CDH R+00 (x2)
192715  -5  503  AA3B US5CDH KN69
192730  -2  648  US5CDH AA3B -12
192745  +0  504  AA3B US5CDH R-11
192800  -2  648  US5CDH AA3B -12 (x2)

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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