R4CF — 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: LO42

Receiver-side FT8 activity involving R4CF, decoded by SO8OO in southeastern Poland. 204 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-09-03.

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 204 FT8 messages attributed to R4CF as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%), followed by 40 m (0%). Several six-hour UTC windows tied for the largest share (84%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -5 dB.

Overview

204
Messages attributed
12
UTC dates decoded
29
Active 15-min windows
-5 dB
Estimated median S/N

Bands

40m · 1 20m · 203
First attributed message: 2026-06-09
Last attributed message: 2026-09-03 02:57 UTC

Observed FT8 message patterns

Attributed sample
204 messages
Active dates
12 UTC dates
Estimated median S/N
-5 dB
Estimated 10th-90th percentile
-19 to +17 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 38, moderate (-15 to -9 dB) 45, strong (≥ -8 dB) 121.

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 R4CF in decoded directed-looking exchanges:

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 R4CF

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
LO42 · 92 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,905 km (approx.)
Last such locator decoded
2026-08-30 13:28 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 UTCBandR4CF S/NCounterpartCounterpart S/NMsgsCapture
10-11 14:38 40m - / -12 DB2HA +4 / - 3 Partial capture
10-11 14:09 40m - / - OH3MB -1 / - 2 Partial capture
10-11 14:03 40m - / - OH3MB -4 / - 2 Partial capture
09-03 02:47 40m - / -10 UB6HJZ -14 / - 2 ✓ Closing fragment
09-03 02:44 40m - / -13 F4BYA +9 / - 4 ✓ Closing fragment
09-03 02:38 40m - / - F4BYA +11 / - 3 Partial capture
08-30 13:31 20m - / - IK4LZH +4 / - 3 Partial capture
08-30 13:28 20m +8 / - IK4POG -10 / -17 4 ✓ Closing observed
08-28 03:31 20m -1 / - KJ1R - / -9 3 Partial capture
08-28 03:28 20m -8 / - XE2GRM - / -15 5 Partial capture
08-28 03:19 20m - / -16 EX8QD -11 / - 3 ✓ Closing fragment
08-27 03:26 20m +18 / - KQ4MHD - / -24 2 Partial capture
08-27 03:23 20m +18 / - 9A2TN - / -7 2 ✓ Closing fragment
08-27 03:15 20m -6 / - KZ4NS - / -13 5 Partial capture
08-27 03:09 20m -11 / - K0BLT - / -4 6 Partial capture
08-27 03:02 20m -4 / - K0BLT - / -6 4 Partial capture
08-27 02:25 20m - / -17 XQ3MCC -10 / - 2 ✓ Closing fragment
08-27 02:21 20m - / - XQ3MCC -9 / - 2 Partial capture
08-27 02:18 20m - / -3 WA3AEP -7 / - 9 ✓ Closing fragment
08-27 02:18 20m - / +5 KE4EB -19 / - 4 ✓ Closing fragment
08-26 03:09 20m -8 / - AA1ZZ - / -5 5 Partial capture
08-26 02:12 20m - / +6 KB3Z -8 / - 3 ✓ Closing fragment
08-24 13:29 20m -3 / - JH0MJB - / -6 3 ✓ Closing fragment
08-24 13:27 20m -4 / - BD6JJP - / -15 2 ✓ Closing fragment
08-24 13:27 20m +1 / -15 9A2RD +8 / -1 6 ✓ Full exchange observed
08-24 13:22 20m -13 / - SM5UNR - / -10 2 ✓ Closing fragment
08-24 13:22 20m -2 / +3 R6ADH -1 / -10 6 ✓ Full exchange observed
08-24 13:20 20m 0 / - UB0SMX/P - / +2 2 ✓ Closing fragment
08-24 07:05 20m -4 / -15 E70SZ +4 / -8 5 ✓ Full exchange observed
07-30 02:43 20m -18 / - K5MGY - / -9 3 ✓ Closing fragment
07-30 02:41 20m -18 / - KA9EKJ - / -11 3 ✓ Closing fragment
07-30 02:01 20m -15 / - N2AWE - / -14 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
024130 -14  627  R4CF R8FH RR73
024430 +13 2982  R4CF F4BYA JN19 (x4)
024700 -17 1888  R4CF UB6HJZ R-10 (x2)
025715 -10 1118  DL9KM R4CF RR73
140300  -5  753  R4CF OH3MB KP20 (x4)
143830  +5  732  R4CF DB2HA JO52 (x3)
20m 
UTC    dB Audio  Message
033030  +1  807  CQ R4CF LO42
033100  +3  807  KJ1R R4CF -09 (x3)
132730  +4 1004  CQ R4CF LO42 (x2)
132815  -8 1004  R4CF IK4POG JN54
132830  +0 1004  CQ R4CF LO42
132845 -11 1004  R4CF IK4POG JN54
132900  +7 1004  IK4POG R4CF -17 (x2)
133030 +11 1003  DB1EF R4CF -05
133145  +7  463  R4CF IK4LZH JN54 (x3)

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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