DH3HW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO31

Receiver-side FT8 activity involving DH3HW, decoded by SO8OO in southeastern Poland. 70 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-08-13.

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 70 FT8 messages attributed to DH3HW as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (40%), followed by 20 m (30%) and 80 m (26%). Several six-hour UTC windows tied for the largest share (79%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

70
Messages attributed
7
UTC dates decoded
16
Active 15-min windows
-13 dB
Estimated median S/N

Bands

80m · 18 40m · 3 20m · 21 10m · 28
First attributed message: 2026-06-07
Last attributed message: 2026-08-13 09:57 UTC

Observed FT8 message patterns

Attributed sample
70 messages
Active dates
7 UTC dates
Estimated median S/N
-13 dB
Estimated 10th-90th percentile
-22 to -5 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 27, moderate (-15 to -9 dB) 26, strong (≥ -8 dB) 17.

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 DH3HW 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 DH3HW

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
JO31 · 41 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,054 km (approx.)
Last such locator decoded
2026-08-13 09:57 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 UTCBandDH3HW S/NCounterpartCounterpart S/NMsgsCapture
09-16 10:38 40m - / -1 DL1LRI 0 / - 3 ✓ Closing fragment
09-16 10:34 40m - / -1 DM5ME -16 / - 3 ✓ Closing fragment
08-11 11:56 20m -24 / - <...> - / -3 2 Partial capture
07-22 10:07 10m - / +1 HA1ZW -10 / - 2 ✓ Closing fragment
07-22 10:02 10m - / -10 F4FSY -11 / - 4 ✓ Closing fragment
07-22 09:58 10m - / +4 IZ2CPP 0 / - 2 ✓ Closing fragment
07-21 14:17 20m - / -6 OE6BME -5 / - 3 Partial capture
07-21 14:02 20m - / -9 HA1AR +2 / - 2 ✓ Closing fragment
07-21 13:16 20m - / -3 IV3BXV -17 / - 2 ✓ Closing fragment
07-21 13:12 20m - / -2 SV7BAY -12 / - 2 ✓ Closing fragment
07-08 12:37 20m - / -15 S54ZGA -21 / - 2 ✓ Closing fragment
07-08 12:33 20m -15 / - OK5AG/P -7 / -11 4 ✓ Full exchange observed
07-08 12:31 20m -12 / -17 RW6HPI -10 / -13 5 ✓ Full exchange observed
07-08 12:25 20m -10 / - LZ67PP - / -15 2 Partial capture
07-04 18:32 20m -7 / - BY6SX - / - 5 Partial capture
07-02 13:46 20m -14 / - R90PNR - / - 2 Partial capture
06-25 18:17 10m -19 / - 7Q9BK - / -15 11 Partial capture
06-25 18:14 10m -19 / - DN9AVK - / -4 2 Partial capture
06-25 18:11 10m -6 / - HA5GZA - / -1 2 ✓ Closing fragment
06-25 18:00 10m -4 / - PR2CC - / - 8 Partial capture
06-25 17:57 10m -14 / - PR2CC - / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
103430 -16 1210  DH3HW DM5ME JO52 (x3)
103815  +3  638  DH3HW DL1LRI -01 (x3)
10m 
UTC    dB Audio  Message
182215 -20 1977  7Q9BK DH3HW R-15 (x4)
095830  -2 1182  DH3HW IZ2CPP +04 (x2)
100230 -10 1671  DH3HW F4FSY -10 (x4)
100700 -10 1362  DH3HW HA1ZW +01 (x2)
103100 -19 1762  DH3HW IK2EBP +02
095545 -21 1792  9A4BP/P DH3HW JO31
095745 -20 1792  HG1DRC DH3HW JO31
20m 
UTC    dB Audio  Message
135300 -15  939  DH3HW I1FLC RR73
131215 -12  824  DH3HW SV7BAY -02 (x2)
131615 -19 2040  DH3HW IV3BXV -03 (x2)
140245  +2 1602  DH3HW HA1AR -09 (x2)
140745 -17 1184  DH3HW F4VWS -19
141715  -1 1502  DH3HW OE6BME -06 (x3)
115630 -23 1727  <...> DH3HW JO31
115645  -9 2268  DH3HW EN35UKR -12
115700 -24 1728  <...> DH3HW R-03 (x2)

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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