SP4KR — reception at SO8OO

Observed FT8 message patterns

Attributed sample

167 messages

Active dates

11 UTC dates

Estimated median S/N

-8 dB

Estimated 10th-90th percentile

-18 to +4 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 36, moderate (-15 to -9 dB) 46, strong (≥ -8 dB) 85.

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 SP4KR 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 SP4KR

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

KO03 · 85 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

400 km (approx.)

Last such locator decoded

2026-10-18 18:31 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
185445 -18 2488  SQ100PKP SP4KR R+05
185500  +4 1287  SP4KR RR73; IU4QQE <...> -10
185600  -6  761  SP4KR F5PBG IN78 (x2)
185645  -9 2488  F5PBG SP4KR RRR (x2)
185815  -7 2489  SP100PKP SP4KR KO03
185900 +14 2490  SP4KR SQ100PKP +00
185945  -5 2488  SP100PKP SP4KR R+16
190000 +14 2490  SP4KR RR73; IW8AOF <...> -16
190015  -7 2488  SP100PKP SP4KR R+16
183130  +3  529  SQ9MEZ SP4KR KO03
183145  +6  532  SP4KR SQ9MEZ -04
183200  +7  529  SQ9MEZ SP4KR R-10
183215  +5  532  SP4KR SQ9MEZ RR73

UTC    dB Audio  Message
103245 -23 1685  PA2WDR SP4KR R-18 (x9)
105515  +6 1034  SP4KR SQ9MEZ -02 (x2)
110045  -5 1032  SP4KR SQ5TOM -15 (x2)
110815  -8 1439  SP4KR OE1AES -10 (x2)

UTC    dB Audio  Message
194600 +15 1036  SP4KR SO100PKP -19
194630 +10 1036  SP4KR RR73; YL3KZ <...> +02

UTC    dB Audio  Message
152045 -10 2839  SP4KR LX1BR +05
204530  +5 2326  SP4KR IQ4JO JN63 (x3)
205100  +2 1928  SP4KR SV5BYP -13 (x4)
205300  +1  533  SP4KR MI7RDK IO74 (x2)
205530 -20 2410  SP4KR CU2JX -10 (x5)

UTC    dB Audio  Message
133730 -17 1213  SP4KR EA3AKY R-15
084430 -16 1570  SP4KR R6LE LN07

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.