RC3KR — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

132 messages

Active dates

4 UTC dates

Estimated median S/N

-6 dB

Estimated 10th-90th percentile

-17 to +5 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 20, moderate (-15 to -9 dB) 37, strong (≥ -8 dB) 75.

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 RC3KR 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 RC3KR

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

KO91 · 21 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,221 km (approx.)

Last such locator decoded

2026-08-03 18:49 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.

Recent FT8 messages decoded at SO8OO

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

UTC    dB Audio  Message
194845 -19 1996  W3KWH RC3KR RR73 (x5)
200145 -20 1996  2D0OMN RC3KR -10
200815 -13 1997  W4DXM RC3KR -13
184930 -22 1863  CQ RC3KR KO91
185330 -24 1863  EB4DMH RC3KR -13
190315  -5 2756  RC3KR DF0KK JO31 (x3)
191345  -4 2954  RC3KR PD0RCQ JO21 (x2)
192245 -10 2670  RC3KR DL1R JN58

UTC    dB Audio  Message
204615 -13 2202  YY4GPM RC3KR -19 (x5)
204845 -13 2202  LU4MAJ RC3KR -13 (x2)
205130 -12 2203  RC3KR DH1GKS JN38
205145 -14 2201  DH1GKS RC3KR -16
205200 -14 2202  RC3KR DH1GKS R-11 (x2)
205645 -20 2201  CQ RC3KR KO91                         a1 (x2)
205845 -18 2202  YY4GPM RC3KR -24 (x2)

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.