DC9YH — 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 DC9YH, decoded by SO8OO in southeastern Poland. 26 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-25 and 2026-09-20.

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 26 FT8 messages attributed to DC9YH as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (58%), followed by 10 m (38%) and 40 m (4%). Several six-hour UTC windows tied for the largest share (58%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (73%); the estimated median was -17 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

40m · 1 20m · 15 10m · 10

First attributed message: 2026-06-25
Last attributed message: 2026-09-20 14:53 UTC

Observed FT8 message patterns

Attributed sample: 26 messages
Active dates: 7 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -21 to -11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 19, moderate (-15 to -9 dB) 6, strong (≥ -8 dB) 1.

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 DC9YH in decoded directed-looking exchanges:

9A2KS · Croatia ×2 DL3NGN · Fed. Rep. of Germany DM3XD · Fed. Rep. of Germany EA8UP · Canary Islands IK2VFR/P · Italy IK4RVY · Italy IQ4JO · Italy PD0HLA · Netherlands SM5MRW · Sweden BG4UCZ · China BG7BVI · China HS0ZOY · Thailand

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 DC9YH

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 · 15 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 911 km (approx.)
Last such locator decoded: 2026-09-20 14:53 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 UTC	Band	DC9YH S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-25 20:50	20m	- / -11	HS0ZOY	+3 / -	2	✓ Closing fragment
08-24 22:25	20m	-14 / -	BG7BVI	- / -20	4	✓ Closing fragment
08-24 21:50	20m	-21 / -	JF1EHM	-15 / -	2	✓ Closing observed
08-23 22:41	20m	- / -17	JH4MGU	-6 / -	2	✓ Closing fragment
08-20 19:56	20m	- / -10	BG4UCZ	-16 / -	2	✓ Closing fragment
08-12 19:00	20m	-16 / -	TF4M	- / -4	2	Partial capture
08-11 18:36	10m	- / -5	EA8UP	-10 / -	2	✓ Closing fragment
06-27 09:46	20m	-14 / -14	AO25HSJ	-11 / -13	5	Partial capture
06-26 15:40	20m	-16 / -	BG4OOO	- / -	2	Partial capture
06-25 18:58	10m	-19 / -	IK4RVY	- / -15	2	✓ Closing fragment
06-25 18:30	10m	-23 / -15	IQ4JO	-3 / -	6	✓ Closing observed
06-25 18:15	10m	- / -2	PD0HLA	-3 / -	4	✓ Closing fragment
06-25 18:07	10m	-20 / -9	9A2KS	-16 / -	6	✓ Closing observed
06-25 18:02	10m	- / -6	DL3NGN	-15 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
145330  -5 2279  F4NGR DC9YH JO40

20m

UTC    dB Audio  Message
195600 -18 2036  DC9YH BG4UCZ -10 (x2)
195730 -13 1764  DC9YH <...> -15
224115  -6 2424  DC9YH JH4MGU -17 (x2)
215000 -21 1701  JF1EHM DC9YH JO40
215045 -15 1702  DC9YH JF1EHM RR73
222530 -16 2043  BG7BVI DC9YH JO40 (x4)
204730 -18 1377  DC9YH BU2FW RRR
205000  +3 2478  DC9YH HS0ZOY -11 (x2)
210000 -11 2275  DC9YH BG7BMG -15

10m

UTC    dB Audio  Message
183200  -4 2658  DC9YH IQ4JO R-15
183215 -23 1277  IQ4JO DC9YH RR73
183230  -2 2658  DC9YH IQ4JO 73
184915 -16  972  PY4AW DC9YH JO40
185830 -21 2055  IK4RVY DC9YH R-15 (x2)
190300 -15 1178  PP5CF DC9YH JO40
100100 -19 1879  CQ DC9YH JO40
100200 -21 1879  SM5MRW DC9YH RR73
100400 -21 2082  IQ0OS DC9YH R-13
140330 -15  839  DC9YH AO25HSJ -14
155545 -13 1428  DC9YH IK2VFR/P RR73
190445 -20 1222  DC9YH PP5CF -11
183630 -10 1213  DC9YH EA8UP -05 (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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