R4KR — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

271 messages

Active dates

39 UTC dates

Estimated median S/N

-14 dB

Estimated 10th-90th percentile

-22 to -5 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 102, moderate (-15 to -9 dB) 114, strong (≥ -8 dB) 55.

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 R4KR 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 R4KR

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

LO64 · 129 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

2,166 km (approx.)

Last such locator decoded

2026-09-19 03:11 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
013245 -17 2277  CQ R4KR LO64
013300  -9 1238  R4KR R4OF LO58
013315 -17 2277  R4OF R4KR +08
013330  -3 1238  R4KR R4OF R+13
013345 -13 2277  R4OF R4KR RRR
013400 -12 1237  R4KR R4OF 73
185030  -9 2836  UA2FF R4KR LO64 (x2)
185215 +22 2840  R4KR UA2FF -06
184730  -3 2430  R4KR R2DYN KO85 (x2)
185000  -7 2493  R4KR UA4AGU -09 (x4)

UTC    dB Audio  Message
161315  +0 2930  R4KR RO3R -09
021100  -9 1393  R4KR EK1KE -15 (x2)
021315  +6  807  R4KR RX7T -17 (x2)
031045  -9  671  CQ R4KR LO64
031115 -19 1730  HZ1TT R4KR LO64
031200 -16 1730  R4KR HZ1TT -24
031215 -22 1730  HZ1TT R4KR R-14
031230 -15 1730  R4KR HZ1TT -24
031245 -23 1730  HZ1TT R4KR R-13
031300 -15 1730  R4KR HZ1TT -24
031345 -24 1729  HZ1TT R4KR RR73
031545 -20 1421  R1AI R4KR R-10 (x2)

UTC    dB Audio  Message
045400 -18 1140  CQ R4KR LO64 (x2)
045545  -8  928  R4KR CT3MD IM13 (x2)
045645 -13 1042  R4KR E77EA R-18
045645  -8  928  R4KR CT3MD IM13
045715 -12 1042  R4KR E77EA R-18 (x2)
045945 -15 1135  R4KR F4LNM R-14
050715  -5  462  R4KR IK4LZH JN54 (x3)
112630 -17 2385  CQ R4KR LO64 (x2)
145830 -18 2247  A41ZZ R4KR R-11

UTC    dB Audio  Message
092230 -12 1795  R4KR F4FSY -19 (x2)
093230 -14  891  R4KR <...> +09
093600 +12  561  R4KR F6GCP 73
071115 -17 2263  R4KR RL1B -08
071345 -12 2630  R4KR RT6C R+03 (x2)
071815 -17 1645  R4KR LZ4VR KN13 (x5)
072145 -10 2033  R4KR RN6MA -05 (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.