RK4FD — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

2,436 messages

Active dates

75 UTC dates

Estimated median S/N

-2 dB

Estimated 10th-90th percentile

-12 to +8 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 82, moderate (-15 to -9 dB) 468, strong (≥ -8 dB) 1,886.

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 RK4FD 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 RK4FD

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

LO22 · 1,357 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,634 km (approx.)

Last such locator decoded

2026-09-08 17:56 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
170800 -24 1427  R4CBF/P RK4FD R-16 (x2)
175530  +9 1342  RK3YWA RK4FD LO22 (x2)
175615 -12 2075  RK4FD RK3YWA +11
175630 +13 1342  RK3YWA RK4FD R-03
175645 -13 2075  RK4FD RK3YWA RRR
175700  +8 1342  RK3YWA RK4FD 73
175715 -14 2075  RK4FD RK3YWA 73
180300 -14 1157  RK4FD R2BRD +13 (x2)
181015  -8 1302  RK4FD R2GFN +17
181030  +2 1008  R2GFN RK4FD R+12
181045  -9 1302  RK4FD R2GFN RRR
181100  +2 1008  R2GFN RK4FD 73

UTC    dB Audio  Message
151730 -13 1909  RK4FD R6OV +02
152045  -2  942  R6OV RK4FD LO22 (x7)
152600 -12 1909  RK4FD R6OV +03 (x2)
161845  -4 1456  CQ RK4FD LO22
161900 -13 1457  RK4FD RL3QGD KO91
161915  -1 1456  SO100PKP RK4FD LO22 (x3)

UTC    dB Audio  Message
194800 +11  778  RO3Z RK4FD LO22 (x4)
210330 -10  863  RY6O RK4FD LO22 (x3)
210500 +15  863  CQ RK4FD LO22
210530  +6  863  RY6O RK4FD LO22
210600 +14  862  CQ RK4FD LO22 (x2)
210700 +14  862  RY6O RK4FD LO22 (x4)

UTC    dB Audio  Message
130845  +5 1105  R1NR RK4FD R-11 (x5)
140045  +1 1105  UB8CSU RK4FD LO22 (x3)
101145  +8  881  R0WBN/P RK4FD LO22 (x7)

UTC    dB Audio  Message
205145  +6  784  RK4FD S57MPU JN76 (x2)

UTC    dB Audio  Message
101845 -17 1246  RI0FA RK4FD LO22
102400 -22 1492  RK4FD RW3VA LO06
124445  -4 1209  <...> RK4FD LO22 (x11)
083200  +7 1252  RK4FD II7MGXX +12 (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.