DL1HTB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO40

Receiver-side FT8 activity involving DL1HTB, decoded by SO8OO in southeastern Poland. 551 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 23 UTC dates in the available aggregate history. Observed between 2026-06-15 and 2026-09-19.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 551 FT8 messages attributed to DL1HTB as the transmitting token by decoded message structure across 23 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (57%), followed by 40 m (34%) and 20 m (9%). Most decodes (89%) fell within the six-hour window 19:00-01:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9.8 dB.

Overview

551
Messages attributed
23
UTC dates decoded
63
Active 15-min windows
-9.8 dB
Estimated median S/N

Bands

80m · 314 40m · 190 20m · 47
First attributed message: 2026-06-15
Last attributed message: 2026-09-19 22:25 UTC

Observed FT8 message patterns

Attributed sample
551 messages
Active dates
23 UTC dates
Estimated median S/N
-9.8 dB
Estimated 10th-90th percentile
-18 to 0 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 103, moderate (-15 to -9 dB) 222, strong (≥ -8 dB) 226.

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 DL1HTB 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 DL1HTB

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
JO40 · 344 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
911 km (approx.)
Last such locator decoded
2026-09-19 22:25 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.

Time UTCBandDL1HTB S/NCounterpartCounterpart S/NMsgsCapture
09-19 22:27 80m - / -12 T77RN -13 / - 3 Partial capture
09-19 18:25 40m 0 / - JA4FKX - / - 3 Partial capture
09-19 18:16 40m -4 / -19 TA4SSK -10 / -24 6 ✓ Full exchange observed
09-19 18:14 40m 0 / -1 DL6EL +14 / - 5 ✓ Full exchange observed
09-18 20:21 80m - / -12 ON1ANW -20 / - 2 ✓ Closing fragment
09-18 20:14 80m -21 / - ON3MOH - / +1 2 ✓ Closing fragment
09-05 23:16 80m -13 / -22 SM7TZK +8 / +6 6 ✓ Full exchange observed
09-05 23:12 80m -15 / - LA2W/P - / -3 5 ✓ Closing fragment
09-05 23:06 80m -11 / - LA9H - / -6 9 ✓ Closing fragment
09-05 23:03 80m -10 / - SP9GCZ - / - 6 Partial capture
09-05 23:01 80m -14 / +2 OU7M/P +7 / - 3 ✓ Full exchange observed
09-05 22:55 80m -17 / -6 OZ7CL -8 / +1 5 ✓ Full exchange observed
09-05 22:51 80m - / -8 F1PBZ +6 / - 2 ✓ Closing fragment
09-05 22:48 80m -16 / -17 DO9POL -18 / -10 6 ✓ Full exchange observed
09-05 22:46 80m -19 / -10 DA6OOM -9 / -2 5 ✓ Full exchange observed
09-05 22:21 80m -17 / -4 SA3LEN +12 / - 5 ✓ Closing observed
09-05 22:18 80m -15 / -15 S57TW +14 / - 6 ✓ Closing observed
09-05 22:18 80m -16 / -9 OZ7KJ/P +1 / - 6 ✓ Full exchange observed
09-05 22:14 80m -15 / -9 F4MZI -7 / +2 6 ✓ Full exchange observed
09-05 22:02 40m -6 / - UR4QWW - / -5 2 ✓ Closing fragment
09-05 22:00 40m -3 / - RV3SBS/P - / +8 2 ✓ Closing fragment
09-05 21:51 40m - / -5 OZ7KJ/P +6 / - 4 ✓ Closing fragment
09-05 21:46 40m - / -7 UT6HN +11 / - 2 Partial capture
09-05 21:43 40m -13 / - RK3AGG -14 / -3 4 ✓ Closing observed
09-05 21:39 40m -13 / - SO100PKP - / - 5 ✓ Closing fragment
09-05 21:34 40m -2 / - UA3UBV/1 - / - 2 ✓ Closing fragment
09-05 21:26 40m -10 / -12 EX7CQ 0 / +1 5 ✓ Full exchange observed
09-03 22:11 40m -2 / - JT1A - / - 5 Partial capture
08-31 19:38 80m - / -17 DG4BZ -10 / - 2 ✓ Closing fragment
08-31 19:30 40m -6 / - II7MGMU - / +10 2 ✓ Closing fragment
08-31 19:29 40m - / -11 GB64MOD 0 / - 2 Partial capture
08-31 19:25 40m -9 / - PD4RJ -11 / +2 3 ✓ Closing observed
08-31 19:20 40m -6 / -4 PD0HLA -1 / - 7 ✓ Closing observed
08-30 10:04 20m - / -14 F1PPH -12 / - 3 ✓ Closing fragment
08-30 10:02 20m -12 / -1 OH1LA -16 / +2 5 ✓ Full exchange observed
08-30 10:00 20m -4 / -9 IQ4JO +3 / -18 5 ✓ Full exchange observed
08-30 09:57 20m -11 / - E75W - / +1 2 ✓ Closing fragment
08-30 09:52 20m -10 / -6 PD1HPB +12 / +9 5 ✓ Full exchange observed
08-29 19:39 80m -9 / -8 DK4FH 0 / 0 2 Partial capture
08-29 15:34 20m - / -16 F4JVF -7 / - 3 ✓ Closing fragment
08-29 10:35 40m -9 / - EA3NG - / +3 2 Partial capture
08-29 10:33 40m - / -6 OZ9FF -7 / - 2 ✓ Closing fragment
08-29 10:28 40m -9 / - PD2XX - / -5 4 ✓ Closing fragment
08-29 10:26 40m -8 / - 9A6TT -8 / +2 4 ✓ Closing observed
08-28 21:44 80m - / -8 PE1NAO -8 / - 2 ✓ Closing fragment
08-28 21:42 80m - / -5 DO2SHJ +12 / - 2 ✓ Closing fragment
08-28 21:41 80m -15 / - PC2K - / - 2 Partial capture
08-28 21:39 80m - / -13 EA1CP +2 / - 2 ✓ Closing fragment
08-28 21:35 80m - / -14 DO6AZ -1 / - 6 Partial capture
08-28 21:26 80m - / - DO2YJG -14 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

80m 
UTC    dB Audio  Message
231730  +7 2284  DL1HTB SM7TZK RR73
231745 -12 2284  SM7TZK DL1HTB 73
231800  +9 2283  DL1HTB SM7TZK 73
201915 -18 2563  CQ DL1HTB JO40
201415 -22 1849  ON3MOH DL1HTB R+01 (x2)
202130 -21 1020  DL1HTB ON1ANW -12 (x2)
222245 -15 1818  T77RN DL1HTB JO40
222445 -16 1818  CQ DL1HTB JO40 (x3)
222730 -11  504  DL1HTB T77RN -12 (x3)
40m 
UTC    dB Audio  Message
181515 +17  610  DL1HTB DL6EL R-01
181530  -2  433  DL6EL DL1HTB RR73
181545 +10  610  DL1HTB DL6EL 73
181600  +1  433  CQ DL1HTB JO40
181630  -1  433  TA4SSK DL1HTB -24 (x4)
181815 -10  433  DL1HTB TA4SSK R-19
181830  -4  432  TA4SSK DL1HTB RR73
181930  -1  433  CQ DL1HTB JO40
182130  -6  432  JA4FKX DL1HTB JO40 (x4)
20m 
UTC    dB Audio  Message
100030  +1 2216  DL1HTB IQ4JO JN63
100045  -4  891  IQ4JO DL1HTB -18
100100  +4 2216  DL1HTB IQ4JO R-09
100115  -4  891  IQ4JO DL1HTB RR73
100130  +5 2216  DL1HTB IQ4JO 73
100215  -9  891  CQ DL1HTB JO40
100230 -16 1891  DL1HTB OH1LA KP01
100245 -14  891  OH1LA DL1HTB +02
100300  -9 1891  DL1HTB OH1LA R-01
100315 -11  890  OH1LA DL1HTB RR73
100330 -22 1891  DL1HTB OH1LA 73
100345  -6  890  CQ DL1HTB JO40
100430 -10  891  DL1HTB F1PPH JN07 (x3)
10m 
UTC    dB Audio  Message
173315 -19 2350  DL1HTB D2ACE RR73

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.

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