SP7TJ — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

563 messages

Active dates

48 UTC dates

Estimated median S/N

+2 dB

Estimated 10th-90th percentile

-11 to +14.9 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 25, moderate (-15 to -9 dB) 62, strong (≥ -8 dB) 476.

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 SP7TJ 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 SP7TJ

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

KO00 · 353 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

84 km (approx.)

Last such locator decoded

2026-09-20 13:15 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
081430  -3 1445  SQ100PKP SP7TJ KO00 (x2)
081700  -2 1446  II7IABB SP7TJ KO00 (x10)
122215  -2 1261  9A5MP SP7TJ KO00 (x2)
131530  -1 1585  IN3JRZ SP7TJ KO00

UTC    dB Audio  Message
045915  +9 2362  SP7TJ YO6LM KN25 (x2)
050015 +14 1607  SO100PKP SP7TJ KO00 (x2)
050100  -1 1608  SP7TJ RR73; YO5IB <...> -04
050500 +14 1388  CT7AUT SP7TJ KO00
050515 +11 1184  HF100PKP SP7TJ KO00 (x2)
050800  +6 1388  CT7AUT SP7TJ KO00 (x7)

UTC    dB Audio  Message
190215  +9 2795  SP7TJ HF5A JO92
190215  -2  266  SP7TJ DD6ZV 73
190245  +6  997  SP7TJ LZ2VQ KN23
190245  -4 2171  SP7TJ DK7UY JO44
190315 +10  997  SP7TJ LZ2VQ KN23
190315  -1 2171  SP7TJ DK7UY JO44
194800 +12  727  SP8BJU SP7TJ KO00 (x9)

UTC    dB Audio  Message
201730  -3 1326  SQ8NGI SP7TJ KO00 (x7)
202115  +6 1196  SP7TJ SP5GW KO12
202130 -13 1325  SP7TJ SQ8NGI -05
202145  -1 1326  SQ8NGI SP7TJ R-05
202145  +6 1196  SP7TJ SP5GW KO12
202200  -8 1326  SP7TJ SQ8NGI RR73
202215  +0 1326  SQ8NGI SP7TJ 73
202245 -12 1326  SP7TJ SQ8NGI RR73
202300  -5 1325  SQ8NGI SP7TJ 73

UTC    dB Audio  Message
075615 -18 2532  SP7TJ F1PBZ -12
075645 -23 1927  SP7TJ R4FDW -08
075715 -12 2532  SP7TJ F1PBZ RR73
102915 -11  519  SP7TJ PD1HPB JO22
102945 -18 1180  SP7TJ PE1MHY -03 (x2)
103145  -3  500  SP7TJ 2E1HAT JO01 (x6)
091630  -5 1408  SP7TJ F1ODM -11
091730  +2 1678  SP7TJ ON1AJ JO20
091830 -10 1408  SP7TJ PD3LKN JO22

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.