RT3K — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

1,382 messages

Active dates

45 UTC dates

Estimated median S/N

-9 dB

Estimated 10th-90th percentile

-18 to +2 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 270, moderate (-15 to -9 dB) 466, strong (≥ -8 dB) 646.

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 RT3K 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 RT3K

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

KO90 · 316 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,223 km (approx.)

Last such locator decoded

2026-07-24 03:36 UTC

Other locator fields attributed to this token: KN99 (241).

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
025130 -13 1683  RT3K W8DPK -14 (x2)
220315  -9  606  8Z1IT RT3K KN99 (x2)
220400 -15  607  RT3K 8Z1IT -14
220415  -1  606  8Z1IT RT3K R-18
220615  -6 1610  RT3K WK1O -12
220630 -12 1610  WK1O RT3K R-07
220730  -4  641  BG2GWN RT3K -15 (x3)
221200 -16 1294  RA0AB RT3K R-15
175900  +2 1715  RT3K EX7CQ -24
175915  -7 2677  EX7CQ RT3K R-07
175930  -4 1715  RT3K EX7CQ RR73

UTC    dB Audio  Message
170715  +2  388  R70SAB RT3K KN99 (x4)
170900 -11 1349  RT3K R70SAB -11
170915  +9  388  R70SAB RT3K R-07 (x3)
171030 -12 1350  RT3K R70SAB RR73
171045 +10  388  R70SAB RT3K 73
024045  +8  375  Z62NS RT3K KN99
024100  +9 1355  RT3K Z62NS +06
024115  +8  375  Z62NS RT3K R-02
024130  +8 1355  RT3K Z62NS RR73
024145 +12  374  Z62NS RT3K 73

UTC    dB Audio  Message
050000 -10 1183  ZL2KR RT3K -18
081700  -4 2675  CT3MD RT3K -04 (x3)
081845  -5  865  RT3K CT3MD R-09
081900  -6 2675  CT3MD RT3K RR73
081915  +1  865  RT3K CT3MD 73
084000 -10 2675  II7MGBT RT3K -11
084015  -9 1153  RT3K TC30AUG R-13
194345  +9 1884  RT3K AO5FSB R-13 (x2)
195100  -1 2381  RT3K EA7KGJ R-15 (x2)
195500  -2 1281  RT3K EB3JT R-15 (x2)

UTC    dB Audio  Message
062115 -11 1054  SP5TL RT3K -08 (x2)
062215 -18 1054  RY2A RT3K -09
062600  -8 1053  RF9C RT3K +01 (x4)
073100 -20 1925  RA9ACA RT3K -05 (x2)
073230 -14 2413  LZ2RR RT3K RR73
073445 -14 2248  RQ7R RT3K -04
073615 -17 1096  R9FFX RT3K RR73
073700 -17 1466  YU1BV RT3K -09 (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.