RU4F — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

622 messages

Active dates

29 UTC dates

Estimated median S/N

-3 dB

Estimated 10th-90th percentile

-12 to +6 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 23, moderate (-15 to -9 dB) 121, strong (≥ -8 dB) 478.

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 RU4F 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 RU4F

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 · 240 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,639 km (approx.)

Last such locator decoded

2026-09-16 14:52 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
143645  -2 2707  RA4FEA RU4F R+03
143700  -1 2485  RU4F RA4FEA RR73
143715  -3 2707  RA4FEA RU4F 73
143800  +1 2707  VU2LBW RU4F LO23
143845  -5 2707  LZ936BA RU4F LO23
143915  -2  537  9A60CBM RU4F R-16
143945  +2 2707  LZ936BA RU4F R-16
144345  +2 2707  KH8WW RU4F LO23 (x3)
144930  -4 2608  NL8F RU4F LO23 (x2)
145115  -2  508  KH8WW RU4F LO23 (x2)
145230  +2  507  NL8F RU4F LO23

UTC    dB Audio  Message
155715  -7  872  KH8WW RU4F LO23 (x15)

UTC    dB Audio  Message
025830 -14  825  RU4F UA4FKT LO23

UTC    dB Audio  Message
192345 -11 2443  DL70ESSEN RU4F -07
192445 -12 2443  TM0BSM RU4F -16
192515 -10 2443  BG7BMG RU4F -11 (x4)
192915 -10 2443  BG7BVI RU4F 73
193100  -9 2443  JI4POR RU4F RR73
165045  -6 2544  RA3RFT/1 RU4F -14
165115  -5 2544  C91RU RU4F LO23 (x6)

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.