RK4FF — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

2,870 messages

Active dates

48 UTC dates

Estimated median S/N

-6 dB

Estimated 10th-90th percentile

-16 to +8 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 341, moderate (-15 to -9 dB) 755, strong (≥ -8 dB) 1,774.

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 RK4FF 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 RK4FF

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 · 49 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,639 km (approx.)

Last such locator decoded

2026-08-30 21:57 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.

Recent FT8 messages decoded at SO8OO

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

UTC    dB Audio  Message
034915  -5 1305  HF100PKP RK4FF -06
035115  -4 1305  DL7AOM RK4FF -15 (x3)
035345  +7 2893  SV8/F6BLP RK4FF -08
035500  -8 1436  RK4FF YU65AEC R-10
035645  -5  947  EH3PDA RK4FF -10
035700 -10  946  RK4FF EH3PDA R-22
035945 -16 1277  PR2AN RK4FF -13 (x2)
040045  -8 1736  ON5WR RK4FF -13 (x3)
040230  -1 2934  J38DX RK4FF -18 (x2)

UTC    dB Audio  Message
174815 +14  950  M9ORB RK4FF -18 (x3)
175145  +2 2103  DL7KI RK4FF -03 (x3)
180830  -6  682  EA4GA/P RK4FF -11 (x2)
180930  -8 1841  PD0PDI RK4FF -14 (x3)
041915  +6 2076  <...> RK4FF -19 (x4)

UTC    dB Audio  Message
215515  -1 1131  RI1FJL RK4FF LO23 (x8)

UTC    dB Audio  Message
183515 -24 1588  DL2RN RK4FF -18
183530  -7 1571  RK4FF DL2RN R-16
183545 -22 1588  DL2RN RK4FF RR73
183600  -8 1571  RK4FF DL2RN 73
183700  -6 1221  YO3HUI RK4FF -17
183730  -6 2640  DO9AND/P RK4FF -18
184145 -12 1360  RK4FF IZ0PMP R-14 (x3)
054945  -7  981  RK4FF SP3IPA JO82 (x3)
232515  -4 1349  RI1FJL RK4FF LO23 (x3)

UTC    dB Audio  Message
112600 -12 2392  DN9OPA RK4FF -02 (x2)
112730 -20 2143  DL9ATW RK4FF -22 (x2)
112900 -16 1304  <...> RK4FF +08
113115  -8 2892  DN9BLN RK4FF -10
113130  +2 2892  RK4FF DN9BLN R-01 (x2)
113600 -17  846  SQ5NAN RK4FF RR73
113630 -20 1304  <...> RK4FF -01
113715 -11 2575  OH1ZE RK4FF -04
114015 -22 1508  YU4EA RK4FF -10
132130 -22 1612  RK4FF IU8QTW R-06 (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.