PD3H — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Netherlands Most frequent locator attributed to this token: JO21

Receiver-side FT8 activity involving PD3H, decoded by SO8OO in southeastern Poland. 188 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 18 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-08-10.

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 188 FT8 messages attributed to PD3H as the transmitting token by decoded message structure across 18 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (40%), followed by 10 m (37%) and 40 m (23%). The busiest six-hour window was 16:00-22:00 UTC, containing 44% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

188

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

40m · 43 20m · 75 10m · 70

First attributed message: 2026-06-07
Last attributed message: 2026-08-10 13:38 UTC

Observed FT8 message patterns

Attributed sample: 188 messages
Active dates: 18 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -19 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 56, moderate (-15 to -9 dB) 70, strong (≥ -8 dB) 62.

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 PD3H in decoded directed-looking exchanges:

TM2WWA · France ×2 F4ILK · France II6WWA · Italy II9WWA · Sicily 9K2OK · Kuwait A61QQ · United Arab Emirates EG4WWA · Spain EG5MYC · Spain EH5FJI · Spain GJ0KYZ · Jersey HS5NMF · Thailand IQ2AAH · Italy

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 PD3H

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: JO21 · 161 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,192 km (approx.)
Last such locator decoded: 2026-08-10 13:38 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	PD3H S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-10 13:37	20m	-21 / -	GI0KMX	- / -	2	Partial capture
08-10 13:11	20m	- / -14	EG5MYC	-22 / -	2	✓ Closing fragment
08-05 13:09	20m	-19 / -	<...>	- / -	3	Partial capture
08-01 19:20	20m	- / -5	TF4M	-7 / -	2	✓ Closing fragment
08-01 19:07	20m	- / +1	EH5FJI	-3 / -	2	✓ Closing fragment
08-01 11:11	10m	-20 / -	C31KC	- / -20	2	Partial capture
07-31 08:17	20m	-10 / -	<...>	- / -	6	Partial capture
07-31 08:09	20m	-5 / -	<...>	- / -	3	Partial capture
07-31 08:04	20m	-16 / -	V31DL	- / -	2	Partial capture
07-30 19:25	20m	-8 / -	HZ1DL	- / -	2	Partial capture
07-30 19:22	20m	-13 / -	HZ1DL	- / -	3	Partial capture
07-30 18:11	20m	-18 / -	<...>	- / -	3	Partial capture
07-27 13:31	10m	- / 0	F4ILK	-10 / -	2	✓ Closing fragment
07-22 21:25	20m	-19 / -	TA3F	- / -	5	Partial capture
07-22 21:14	20m	-16 / -	IQ2AAH	- / 0	3	✓ Closing fragment
07-22 21:03	20m	- / -11	A61QQ	-8 / -	2	✓ Closing fragment
07-22 20:58	40m	-17 / -	SN1A	- / -	2	Partial capture
07-22 20:46	40m	-16 / -	<...>	- / -12	2	Partial capture
07-22 20:42	40m	-16 / -	<...>	- / -17	2	Partial capture
07-22 20:40	40m	-15 / -	HF170TESLA	- / -	2	Partial capture
07-22 20:36	40m	-18 / -	HF170TESLA	- / -	2	Partial capture
07-22 20:30	40m	-18 / -	HF170TESLA	- / -	2	Partial capture
07-20 18:05	20m	-14 / -	JY5CG	- / -	2	Partial capture
07-20 17:58	20m	-15 / -	BI4XDT	- / -	5	Partial capture
07-20 17:15	10m	-16 / -	IQ0AAI	- / -	5	Partial capture
07-20 12:10	20m	- / +1	GJ0KYZ	-4 / -	2	✓ Closing fragment
07-13 13:21	10m	-13 / -	TM40TFR	- / -9	3	Partial capture
07-08 17:07	20m	-18 / -22	<...>	-17 / -20	3	Partial capture
07-07 16:06	20m	-18 / -	<...>	- / -4	2	Partial capture
07-05 12:13	10m	- / -23	II9WWA	-17 / -	2	✓ Closing fragment
07-05 11:50	10m	- / -10	TM2WWA	+4 / -	2	✓ Closing fragment
07-02 21:44	20m	- / -11	TN8GD	-11 / -	2	✓ Closing fragment
07-02 19:48	20m	- / -14	EG4WWA	-8 / -	2	✓ Closing fragment
07-02 19:35	20m	- / -10	TA6U	-11 / -	2	✓ Closing fragment
07-02 19:13	20m	- / -16	IR0WWA	-9 / -	3	✓ Closing fragment
07-02 18:04	20m	- / -15	HS5NMF	-14 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
192100  -4 2333  PD3H TF4M RR73
132900 -20 1174  RD9FC PD3H JO21
130945 -20 1173  <...> PD3H JO21 (x3)
132800 -17 1173  VE1JS PD3H R-16
155830  -9 1221  PD3H MW9LQA -18 (x2)
162845 -18 2070  PD3H <...> +03 (x2)
103600 -23 1476  PD3H DB2VS +07
131130 -21 1697  PD3H EG5MYC -14 (x2)
133730 -21 1174  GI0KMX PD3H JO21 (x2)

10m

UTC    dB Audio  Message
131215 -11 1189  <...> PD3H JO21
132130 -13 1189  TM40TFR PD3H -09 (x3)
134215 -11 1189  <...> PD3H JO21
134245 -10 1189  <TM40TFR> PD3H R+14
171545 -18 1191  IQ0AAI PD3H JO21 (x5)
133100 -11 2522  PD3H F4ILK +00 (x2)
111115 -20 1187  C31KC PD3H JO21 (x2)

40m

UTC    dB Audio  Message
203115 -18 1137  HF170TESLA PD3H JO21 (x5)
204215 -19 1138  <...> PD3H JO21 (x4)
204930 -24 1835  PD3H SN1A -09
205815 -16 1138  SN1A PD3H JO21 (x2)
213130 -15 1138  <...> PD3H JO21
213215  -6  513  PD3H TM73TFR -08
214630 -18 1138  IQ4JO PD3H JO21

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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