JJ1RDX — 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 JJ1RDX, decoded by SO8OO in southeastern Poland. 15 FT8 messages attributed to this token as transmitter, on 10m, across 1 UTC dates in the available aggregate history. Last observed 2026-10-10.

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 15 FT8 messages attributed to JJ1RDX as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (100%). In this small sample, the estimated median decoder S/N was -2 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-2 dB

Estimated median S/N

Bands

10m · 15

First attributed message: 2026-10-10
Last attributed message: 2026-10-10 08:01 UTC

Observed FT8 message patterns

Attributed sample: 15 messages
Active dates: 1 UTC dates
Estimated median S/N: -2 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

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

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 JJ1RDX in decoded directed-looking exchanges:

7Z1BQ · Saudi Arabia DF8QB · Fed. Rep. of Germany DO9BAU · Fed. Rep. of Germany F4FSY · France IU1WKA · Italy OZ8ABA · Denmark R3DFM · European Russia SM3JBO · Sweden SV5BYP · Dodecanese

Most frequent locator attributed to JJ1RDX

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
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,693 km (approx.)
Last such locator decoded: 2026-10-10 07:57 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	JJ1RDX S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-10 07:59	10m	0 / -	IW6CZF	- / -20	6	Partial capture
10-10 07:58	10m	+1 / -	DO9BAU	- / -16	2	✓ Closing fragment
10-10 07:56	10m	-2 / -	SV5BYP	- / -8	2	✓ Closing fragment
10-10 07:55	10m	-4 / -	R3DFM	- / -10	2	✓ Closing fragment
10-10 07:54	10m	-4 / -	SM3JBO	- / -17	2	✓ Closing fragment
08-22 10:16	10m	- / -12	IU1WKA	+1 / -	5	✓ Closing fragment
08-22 10:13	10m	- / -	DN9BT	+1 / -	2	Partial capture
08-22 10:09	10m	- / -	DN9MRB	-10 / -	2	Partial capture
08-22 09:54	10m	- / -16	DF8QB	-9 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
075445  -3 3040  SM3JBO JJ1RDX 73
075515  -5 3040  R3DFM JJ1RDX R-10 (x2)
075645  -2 3040  SV5BYP JJ1RDX R-08 (x2)
075745  -4 3041  CQ DX JJ1RDX PM95
075815  +2 3041  DO9BAU JJ1RDX -16 (x2)
075915  +2 3041  IW6CZF JJ1RDX R-20 (x6)
094830 -24 1396  JJ1RDX 7Z1BQ RR73

CW

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

Explore CW reception at SO8OO

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