R4FZ — 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: European Russia Most frequent locator attributed to this token: LO23

Receiver-side FT8 activity involving R4FZ, decoded by SO8OO in southeastern Poland. 341 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-28 and 2026-08-04.

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 341 FT8 messages attributed to R4FZ as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (63%), followed by 40 m (34%) and 10 m (2%). Most decodes (55%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

341
Messages attributed
5
UTC dates decoded
45
Active 15-min windows
-10 dB
Estimated median S/N

Bands

40m · 117 20m · 216 10m · 8
First attributed message: 2026-06-28
Last attributed message: 2026-08-04 12:44 UTC

Observed FT8 message patterns

Attributed sample
341 messages
Active dates
5 UTC dates
Estimated median S/N
-10 dB
Estimated 10th-90th percentile
-17 to +5 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 57, moderate (-15 to -9 dB) 155, strong (≥ -8 dB) 129.

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 R4FZ in decoded directed-looking exchanges:

Most frequent locator attributed to R4FZ

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
LO23 · 195 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,639 km (approx.)
Last such locator decoded
2026-08-04 08:49 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 UTCBandR4FZ S/NCounterpartCounterpart S/NMsgsCapture
08-09 13:31 20m - / -14 DB1EF -18 / - 3 Partial capture
08-09 13:30 20m - / - DK3HV -3 / - 4 Partial capture
08-09 13:28 20m - / -12 E70SZ -6 / - 4 Partial capture
08-04 13:33 20m - / -11 RN6MA -8 / - 2 ✓ Closing fragment
08-04 13:31 20m - / - EA3HMM -5 / - 3 Partial capture
08-04 13:17 20m - / - EA3HMM +1 / - 3 Partial capture
08-04 12:48 20m - / - S52D -10 / - 2 Partial capture
08-04 12:43 20m - / - UA1ABO -21 / - 2 Partial capture
08-04 08:52 20m - / - F4PCM -10 / - 2 Partial capture
08-04 08:46 20m -24 / -9 EB3JT -22 / - 4 ✓ Closing observed
08-04 08:38 20m - / - DL3MIB -8 / - 6 Partial capture
08-04 08:37 20m -18 / +3 IK4LZH +8 / 0 5 ✓ Full exchange observed
08-04 08:36 20m -16 / -17 IW2DNI -4 / - 11 ✓ Closing observed
08-04 08:33 20m - / - IK4LZH +4 / - 4 Partial capture
08-04 08:33 20m -15 / - OH1LA - / -5 5 Partial capture
08-04 08:31 20m - / - DL3MIB -3 / - 5 Partial capture
08-04 07:17 20m - / -10 LZ2SPD -23 / - 2 Partial capture
08-04 07:06 20m -23 / -15 YO9PH -5 / - 4 ✓ Closing observed
08-04 06:57 20m -18 / - DM3VPJ - / 0 2 ✓ Closing fragment
08-04 06:56 20m - / - F4LNM -17 / - 3 Partial capture
08-04 06:46 20m - / - IX1HPN -20 / - 6 ✓ Closing fragment
08-04 06:46 20m - / -10 R6KA -13 / - 5 ✓ Closing fragment
08-04 06:24 20m - / -16 IU5TPM -6 / - 2 Partial capture
08-04 06:22 20m - / - IW2DNI -4 / - 38 Partial capture
08-04 06:19 20m - / -12 YO4NT -6 / - 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
133145  -4  509  R4FZ EA3HMM JN00 (x2)
133345  -7  461  R4FZ RN6MA R-11 (x2)
132815  -3  562  R4FZ E70SZ JN84 (x4)
133045  +2  562  R4FZ DK3HV JO31 (x2)
133115 -16 1563  R4FZ DB1EF JO41
133145  +1  562  R4FZ DK3HV JO31
133145 -20 1563  R4FZ DB1EF JO41
133215  -4  562  R4FZ DK3HV JO31
133315 -17 1563  R4FZ DB1EF R-14

CW

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

Explore CW reception at SO8OO

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