SP1TJ — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

2,015 messages

Active dates

89 UTC dates

Estimated median S/N

-4.1 dB

Estimated 10th-90th percentile

-15.8 to +7 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 205, moderate (-15 to -9 dB) 421, strong (≥ -8 dB) 1,389.

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 SP1TJ 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 SP1TJ

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

JO74 · 1,519 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

686 km (approx.)

Last such locator decoded

2026-09-15 04:11 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
163045  +2 1527  II8IHBC SP1TJ R-14
163100 -11 1527  SP1TJ RR73; SP7MAZ <...> -08
163215  +7 1360  II9IAGM SP1TJ JO74
163330 -18 1360  SP1TJ II9IAGM -05
163345 +10 1359  II9IAGM SP1TJ R-15 (x4)
044015  -6 1607  II7IAME SP1TJ JO74 (x2)
044415  -7 1446  KE2HRO SP1TJ JO74
041145  -1 2048  N4BFR SP1TJ JO74 (x2)
041230 -23 2049  SP1TJ N4BFR RRR
041245  +4 2047  N4BFR SP1TJ 73

UTC    dB Audio  Message
031330 +11 2742  KZ4MW SP1TJ JO74 (x2)
032115  -8  216  PA4PA SP1TJ JO74
032130  -7  216  SP1TJ PA4PA -03
032145  -4  216  PA4PA SP1TJ R+03
032200 -11  216  SP1TJ PA4PA RR73
032215  -3  216  PA4PA SP1TJ 73
033930 -13 1950  SK150LM SP1TJ JO74 (x3)
040700  +0 2338  KE2ICI SP1TJ JO74 (x3)
040830  -6 1681  VE3BNW SP1TJ JO74 (x2)

UTC    dB Audio  Message
052530 -11 2734  SP1TJ ZL3GAV -15 (x4)
065600 -11  767  SP1TJ M0KCB/P -10
195900 -10  325  BI4MPH SP1TJ JO74 (x3)
082730 -10 1487  SP1TJ HB9ITZ -10 (x2)
154830  +1 2153  SP1TJ M8KKH JO01 (x5)

UTC    dB Audio  Message
094945 +10 2850  SP1TJ II6WWA RR73
095145 +13 2796  SP1TJ TM2WWA -04 (x2)
115230 -11 2538  SP1TJ TM74TFR +19
114430 -11 2645  SP1TJ F1PBZ -13
143930  -2  654  SP1TJ TM84TFR -15
144100  +1  654  SP1TJ <...> -15 (x2)
085045 -17 1346  SP1TJ UA4FKT LO23 (x2)
155615  -3 2949  SP1TJ DO1FDK JO41
102215  -8  996  SP1TJ <...> -06
135815  +0  349  SP1TJ IU2VBP JN45 (x2)
091930 -16 1879  SP1TJ II7MGMU -03

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.