PI4RCK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Netherlands Most frequent locator attributed to this token: JO22

Receiver-side FT8 activity involving PI4RCK, decoded by SO8OO in southeastern Poland. 163 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-07-11 and 2026-09-18.

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 163 FT8 messages attributed to PI4RCK as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (74%), followed by 40 m (26%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

163

Messages attributed

UTC dates decoded

Active 15-min windows

-7 dB

Estimated median S/N

Bands

40m · 43 20m · 120

First attributed message: 2026-07-11
Last attributed message: 2026-09-18 16:55 UTC

Observed FT8 message patterns

Attributed sample: 163 messages
Active dates: 4 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -18 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 34, moderate (-15 to -9 dB) 35, strong (≥ -8 dB) 94.

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 PI4RCK in decoded directed-looking exchanges:

9A4ZM · Croatia ×2 R1AV · European Russia ×2 BG5JGG · China BH4ECL · China JE6QUO · Japan OH1LA · Finland OH7BDI · Finland OZ1LDO · Denmark R1BGY · European Russia R4FDW · European Russia R6LQU · European Russia RV3DBV · European Russia

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 PI4RCK

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: JO22 · 92 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,201 km (approx.)
Last such locator decoded: 2026-09-18 16:55 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	PI4RCK S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-18 16:54	40m	-1 / -	S55X	- / -	2	Partial capture
08-14 18:19	20m	-10 / -	BH4ECL	- / -8	2	✓ Closing fragment
08-14 18:17	20m	-18 / -	BG5JGG	- / -13	2	✓ Closing fragment
07-17 20:33	20m	- / -	M6MHG	-4 / -	2	Partial capture
07-17 20:31	20m	-7 / -	R4FDW	- / +3	2	✓ Closing fragment
07-17 19:34	20m	- / -14	JA7BXS	-20 / -	4	Partial capture
07-17 19:26	20m	- / -10	YO6PNM	-3 / -	2	✓ Closing fragment
07-17 19:23	40m	+7 / -	DJ8TX	- / -9	2	✓ Closing fragment
07-17 19:22	40m	- / -	PE1NPS	-14 / -	2	Partial capture
07-17 19:21	40m	+8 / -	R1AV	- / +8	2	✓ Closing fragment
07-17 19:18	40m	+12 / -	DL1SRS	-10 / -	3	✓ Full exchange observed
07-17 19:18	20m	- / -7	UA6YW	+12 / -	4	Partial capture
07-17 19:18	40m	- / -	RK3AQ	-10 / -	2	Partial capture
07-17 19:18	20m	-16 / -	SM0EJR	- / -	2	✓ Closing fragment
07-17 19:17	40m	+12 / +9	PA2KV	-5 / +6	5	✓ Full exchange observed
07-17 19:15	40m	+9 / -	JJ1LAH	- / -16	2	✓ Closing fragment
07-17 19:14	40m	+11 / -13	SP9NSQ	-7 / -	2	Partial capture
07-17 19:13	40m	+9 / -	YC7ANC	- / -19	2	✓ Closing fragment
07-17 19:11	40m	+8 / -	YC2TFB	- / -15	4	✓ Closing fragment
07-17 19:09	20m	-20 / -2	OH7BDI	-12 / -	6	✓ Full exchange observed
07-17 19:06	20m	- / -	UR1CCO	-6 / -	3	Partial capture
07-17 19:05	20m	- / -7	R4FDW	-14 / -	11	Partial capture
07-17 18:40	20m	-8 / -	JE6QUO	- / -8	2	✓ Closing fragment
07-17 18:36	20m	-5 / -	BG3NBD	- / -6	2	Partial capture
07-17 18:34	20m	-5 / -	R6ZAJ	-12 / 0	2	Partial capture
07-17 18:33	20m	- / +9	R4FDW	-16 / -	8	Partial capture
07-17 18:32	20m	-8 / -1	UT7EM	-20 / +2	3	✓ Full exchange observed
07-17 18:31	20m	- / -	F4IIX	-8 / -	2	Partial capture
07-17 18:28	20m	-8 / -11	OZ1LDO	-21 / -	3	✓ Full exchange observed
07-17 18:26	20m	-1 / -4	R6LQU	-19 / +5	5	✓ Full exchange observed
07-17 18:23	20m	-3 / -	OH1LA	- / +4	3	✓ Closing fragment
07-17 18:18	20m	-10 / +2	UR4UT	-14 / +8	4	✓ Full exchange observed
07-17 18:16	20m	-4 / -	RW0IM	- / -18	2	✓ Closing fragment
07-17 18:08	20m	- / +8	RN6MA	-1 / -	3	Partial capture
07-17 18:07	20m	-2 / -9	9A4ZM	-6 / -10	5	✓ Full exchange observed
07-17 18:05	20m	-2 / -	RY7G	-7 / -	2	✓ Closing observed
07-17 18:01	20m	-4 / -	R1AV	- / +4	2	✓ Closing fragment
07-17 17:57	20m	- / -	9A4ZM	-7 / -	3	Partial capture
07-17 17:53	20m	- / -	F1PPH	-5 / -	8	Partial capture
07-17 17:48	20m	- / -15	R4HHN	-6 / -	2	Partial capture
07-17 17:42	20m	- / -	UR5VPR	-14 / -	2	✓ Closing fragment
07-11 20:06	40m	-5 / -3	9A4ZM	-2 / -	5	✓ Closing observed
07-11 20:06	40m	- / -12	DK7ZT	-16 / -	4	Partial capture
07-11 20:02	40m	-9 / -6	DF8RU	0 / -	5	✓ Closing observed
07-11 20:00	40m	-17 / -	IN3LHF	- / +1	2	Partial capture
07-11 19:57	40m	-18 / +1	DK7UY	-20 / +10	5	✓ Full exchange observed
07-11 19:57	40m	- / -	DK7ZT	-18 / -	2	Partial capture
07-11 19:55	40m	-17 / -	F1PBZ	-19 / -	3	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
191830  -8 1158  PI4RCK RK3AQ KO85
191845 +13  433  DL1SRS PI4RCK +11
191900 -10  434  PI4RCK DL1SRS R+19
191915 +11  433  DL1SRS PI4RCK RR73
191930 -12 1158  PI4RCK RK3AQ KO85
192045  +9  433  YC2BUZ PI4RCK RR73
192115  +6  433  R1AV PI4RCK +08 (x2)
192200 -15 2338  PI4RCK PE1NPS JO22 (x2)
192345  +8  433  DJ8TX PI4RCK -09 (x2)
192445  +9  433  CQ PI4RCK JO22
165430  +1  426  S55X PI4RCK JO22 (x2)

20m

UTC    dB Audio  Message
193530 -23 1726  PI4RCK JA7BXS -14 (x3)
203015 -13 1725  CQ PI4RCK JO22 (x2)
203115  -9 1725  R4FDW PI4RCK R+03 (x2)
203215  -6 1725  CQ PI4RCK JO22
203300  -5 1724  PI4RCK M6MHG JO01 (x2)
181745 -20 1521  BG5JGG PI4RCK -13 (x2)
181845 -13 1520  CQ AS PI4RCK JO22
181915 -13 1520  BH4ECL PI4RCK -08 (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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