JE4YMO — 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: PM74

Receiver-side FT8 activity involving JE4YMO, decoded by SO8OO in southeastern Poland. 14 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-31.

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 14 FT8 messages attributed to JE4YMO as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (86%), followed by 20 m (14%). In this small sample, the estimated median decoder S/N was -20 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-20 dB

Estimated median S/N

Bands

40m · 12 20m · 2

First attributed message: 2026-06-06
Last attributed message: 2026-10-31 22:17 UTC

Observed FT8 message patterns

Attributed sample: 14 messages
Active dates: 2 UTC dates
Estimated median S/N: -20 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 10, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 1.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with JE4YMO in decoded directed-looking exchanges:

F5IYE · France ON4IQ · Belgium SV5BYP · Dodecanese BA4IE · China DK8MM · Fed. Rep. of Germany HA7XL · Hungary IK4TVP · Italy LP2E · Argentina LZ2KV · Bulgaria UA4FKT · European Russia

Most frequent locator attributed to JE4YMO

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: PM74 · 5 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,565 km (approx.)
Last such locator decoded: 2026-10-31 22:17 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	JE4YMO S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-01 11:35	40m	- / -	OH3MB	-6 / -	2	Partial capture
10-31 22:15	40m	-16 / -	C31CT	- / -	2	Partial capture
10-31 21:53	40m	-18 / -	IK4TVP	- / -8	2	✓ Closing fragment
10-31 21:47	40m	- / -	EB2DYG	-15 / -	2	Partial capture
10-31 21:47	40m	- / -	F5PBG	-10 / -	2	Partial capture
10-31 21:42	40m	- / -15	IU5JKZ	-23 / -	3	Partial capture
10-30 12:58	40m	- / -14	LZ2KV	-4 / -	4	✓ Closing fragment
10-30 12:55	40m	- / -16	DK8MM	+10 / -	5	✓ Closing fragment
10-30 12:54	40m	- / -25	DK7ZT	-14 / -	2	Partial capture
10-30 11:36	40m	- / -16	UA4FKT	-6 / -	5	✓ Closing fragment
10-30 11:33	40m	- / -	UA4FKT	-18 / -	2	Partial capture
08-14 13:46	20m	- / -22	ON4IQ	+9 / -	5	✓ Closing fragment
08-12 22:05	20m	- / -24	SV5BYP	-16 / -	5	✓ Closing fragment
08-11 21:52	20m	- / -12	F5IYE	-14 / -	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
214945 -20 2058  LP2E JE4YMO 73
215245 -23 2058  HA7XL JE4YMO RR73
215315 -17 2058  IK4TVP JE4YMO R-08 (x2)
215445 -23 2058  S52R JE4YMO -14
215515 -22 2058  UF5F JE4YMO -08
215545 -22 2058  C31CT JE4YMO PM74
220630 -22 1726  BA4IE JE4YMO 73
220815  -7  475  JE4YMO EB3DBR JN11
221015  -8 2625  YO3FRI JE4YMO R-08
221545 -11 2419  C31CT JE4YMO PM74 (x2)
113530 -13 1736  JE4YMO OH3MB KP20 (x3)

20m

UTC    dB Audio  Message
215200  -9 2050  JE4YMO F5IYE JN05 (x4)
220530 -14 1642  JE4YMO SV5BYP -24 (x5)
220800 -17 1642  JE4YMO RR73; 7M2PDT <...> -08
134600  +6 2425  JE4YMO ON4IQ JO20 (x5)

CW

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

Explore CW reception at SO8OO

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