JH7CSU — 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: Japan Most frequent locator attributed to this token: PM95

Receiver-side FT8 activity involving JH7CSU, decoded by SO8OO in southeastern Poland. 156 FT8 messages attributed to this token as transmitter, on 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-06-19.

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 156 FT8 messages attributed to JH7CSU as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Most decodes (100%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (64%); the estimated median was -11 dB.

Overview

156

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

20m · 156

First attributed message: 2026-06-06
Last attributed message: 2026-06-19 18:49 UTC

Observed FT8 message patterns

Attributed sample: 156 messages
Active dates: 7 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -17 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 20, moderate (-15 to -9 dB) 100, strong (≥ -8 dB) 36.

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 JH7CSU in decoded directed-looking exchanges:

EA3AKY · Spain CR7BRV · Portugal DC5EG · Fed. Rep. of Germany EA5D · Spain EA7KO · Spain F4LZZ · France F5SOI · France LA4YGA · Norway ON7NQ · Belgium PD2WL · Netherlands R4FDK · European Russia R5AJ · European Russia

Most frequent locator attributed to JH7CSU

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: PM95 · 47 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,693 km (approx.)
Last such locator decoded: 2026-06-19 18:46 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	JH7CSU S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-23 18:58	80m	- / -3	RU9CK	-4 / -	2	✓ Closing fragment
10-23 15:30	40m	- / -	RT6Z	+3 / -	3	Partial capture
10-23 15:16	40m	- / -12	RJ3DC	-12 / -	3	✓ Closing fragment
10-23 15:15	40m	- / -14	UB6OAJ	-6 / -	2	✓ Closing fragment
10-23 15:11	40m	- / -	SP9EO	+5 / -	7	Partial capture
10-23 14:59	40m	- / -16	R7LC	+6 / -	3	✓ Closing fragment
10-23 14:54	40m	- / -16	YO4FPF	+1 / -	4	✓ Closing fragment
10-23 14:52	40m	- / -20	RA3BQ	-4 / -	4	✓ Closing fragment
10-22 19:31	40m	- / -13	EX7CQ	-14 / -	2	✓ Closing fragment
09-10 21:44	40m	- / -15	HA7TM	-16 / -	2	Partial capture
08-27 09:45	10m	- / -8	EA3AKY	-11 / -	2	✓ Closing fragment
08-07 15:03	20m	- / -11	ON7NQ	-5 / -	3	✓ Closing fragment
08-05 19:30	20m	- / -	EA8NL	-12 / -	2	Partial capture
08-05 19:23	20m	- / -10	EA7KO	-8 / -	2	✓ Closing fragment
08-05 19:15	80m	- / -	9A1KO	+5 / -	5	Partial capture
08-05 19:08	20m	- / -19	F4LZZ	-10 / -	4	✓ Closing fragment
08-05 19:07	20m	- / -13	F5SOI	-10 / -	3	✓ Closing fragment
08-05 19:04	20m	- / -15	CR7BRV	+5 / -	3	✓ Closing fragment
08-05 19:00	20m	- / -12	PD2WL	-13 / -	6	✓ Closing fragment
08-05 18:56	20m	- / -17	R4FDK	-11 / -	4	✓ Closing fragment
08-04 21:27	20m	- / -18	IZ4EKI	-7 / -	2	Partial capture
08-01 20:48	20m	- / -11	EA5JLB	-10 / -	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
191545  +2 2579  JH7CSU 9A1KO JN75 (x5)
185800  -3  407  JH7CSU RU9CK -03 (x2)

40m

UTC    dB Audio  Message
151245  +3 2684  JH7CSU SP9EO JN99 (x5)
151515  -8  584  JH7CSU UB6OAJ -14 (x2)
151645 -16 1491  JH7CSU RJ3DC KO95 (x3)
153045  +8 2905  JH7CSU RT6Z KN98 (x2)
153245 +21 2845  JH7CSU R5DT KO94
153315  +0 2905  JH7CSU RT6Z KN98 (x2)

10m

UTC    dB Audio  Message
094515 -13 1222  JH7CSU EA3AKY -08 (x2)

20m

UTC    dB Audio  Message
190945 -10 2565  JH7CSU F4LZZ R-19 (x2)
191445  -6 2925  JH7CSU LA4YGA 73
192315  -6  265  JH7CSU EA7KO R-10 (x2)
193045 -11 1440  JH7CSU EA8NL IL28 (x2)
150315  -3 3032  JH7CSU ON7NQ JO21 (x3)
203430  -4 1015  JH7CSU 5B/IK7YTT +07
203715  -5 2514  JH7CSU R5AJ RR73
155815  +9 2810  JH7CSU DL5SUA JO53
195700  -1 1227  JH7CSU HB9IUI JN36
154500  -5 2078  JH7CSU EA5D RR73

CW

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

Explore CW reception at SO8OO

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