RA4PKA — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO64

Receiver-side FT8 activity involving RA4PKA, decoded by SO8OO in southeastern Poland. 173 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 23 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-23.

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 173 FT8 messages attributed to RA4PKA 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 (71%), followed by 40 m (24%) and 20 m (5%). Most decodes (97%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

173

Messages attributed

UTC dates decoded

Active 15-min windows

-16 dB

Estimated median S/N

Bands

80m · 123 40m · 41 20m · 9

First attributed message: 2026-06-07
Last attributed message: 2026-10-23 17:48 UTC

Observed FT8 message patterns

Attributed sample: 173 messages
Active dates: 23 UTC dates
Estimated median S/N: -16 dB
Estimated 10th-90th percentile: -23 to -10 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 89, moderate (-15 to -9 dB) 77, strong (≥ -8 dB) 7.

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 RA4PKA in decoded directed-looking exchanges:

R9CS/P · European Russia ×3 RA7T · European Russia ×2 R4DS · European Russia RA4Y · European Russia RW1C · European Russia UA1OMS · European Russia UA4FKT · European Russia RD0L · Asiatic Russia RZ6CO · European Russia LZ3CB · Bulgaria R3PLN/P · European Russia RA3LBW · 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 RA4PKA

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: LO64 · 98 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,166 km (approx.)
Last such locator decoded: 2026-10-23 17:48 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	RA4PKA S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-23 17:46	80m	-22 / -13	RT3K	-7 / -16	4	✓ Full exchange observed
10-23 17:42	80m	-16 / -	R6DJR	-10 / -19	2	✓ Closing observed
10-23 17:41	80m	-10 / -	RA9SBN	- / +1	3	✓ Closing fragment
10-23 15:34	80m	-14 / -	RZ4M	- / -2	2	✓ Closing fragment
10-23 15:24	80m	- / -8	RD9FC	-20 / -	2	✓ Closing fragment
10-23 13:54	40m	- / -	OE6TNO	-2 / -	9	Partial capture
10-23 13:51	40m	- / 0	R1BRY	-16 / -	2	Partial capture
10-22 13:35	40m	- / -	OK2CNI	-1 / -	7	Partial capture
10-14 16:56	80m	- / -5	RZ3ZY	-4 / -	3	✓ Closing fragment
10-14 16:52	80m	- / +2	R9AL	-14 / -	2	✓ Closing fragment
10-14 16:48	80m	- / -7	R9XAC	-14 / -	3	✓ Closing fragment
10-14 16:01	80m	-15 / -2	RO5A	+1 / -11	5	✓ Full exchange observed
10-14 15:59	80m	-12 / -15	RA3M	0 / -10	4	✓ Full exchange observed
10-12 15:47	80m	- / -2	RQ4F	-14 / -	2	✓ Closing fragment
10-12 15:46	80m	- / 0	RD3MF	-4 / -	2	✓ Closing fragment
10-12 15:46	80m	- / -14	RK3ZB	-11 / -	3	✓ Closing fragment
10-11 17:40	160m	- / +5	RA4Y	-19 / -	3	✓ Closing fragment
10-11 17:19	160m	- / -19	RA7T	-4 / -	2	✓ Closing fragment
10-11 17:08	160m	- / -16	UA4FKT	-18 / -	3	✓ Closing fragment
10-10 16:36	80m	- / -9	R3MBV	-12 / -	2	Partial capture
10-10 16:34	80m	- / -9	R2PT	-4 / -	2	✓ Closing fragment
10-09 17:48	40m	- / -14	RA6FCU/P	-6 / -	2	Partial capture
10-09 16:56	40m	-16 / -	RT3K/P	- / -9	3	Partial capture
10-09 16:28	160m	- / -17	RW1C	+1 / -	3	✓ Closing fragment
10-09 16:16	160m	- / -17	UA1OMS	+1 / -	3	✓ Closing fragment
10-06 15:55	80m	-18 / -13	RD7LC	-16 / -6	4	✓ Full exchange observed
10-06 15:53	80m	- / -13	UA3GJM	-6 / -	3	✓ Closing fragment
10-06 15:52	80m	- / -10	RU6FS	-11 / -	3	✓ Closing fragment
10-06 15:50	80m	-22 / -9	RU4F	-11 / +1	4	✓ Full exchange observed
10-06 15:49	80m	- / -10	UN7LAN	-16 / -	2	✓ Closing fragment
10-02 18:11	80m	- / -15	RN3N	-12 / -	3	✓ Closing fragment
09-30 16:24	80m	-20 / -16	RQ3D	-22 / -12	4	✓ Full exchange observed
09-30 16:18	80m	-19 / -8	R6FFB	0 / -	4	✓ Closing observed
09-30 16:17	80m	- / -2	R2HD	-6 / -	2	✓ Closing fragment
09-30 16:14	80m	- / -6	EV1R	+9 / -	3	✓ Closing fragment
09-30 16:14	80m	- / -	R6FFB	-2 / -	4	Partial capture
09-30 15:46	80m	-20 / -6	R2SDZ	-4 / +10	4	✓ Full exchange observed
09-30 15:39	80m	- / -20	UA3YGP	+1 / -	4	Partial capture
09-30 15:38	80m	-16 / -3	RA7T	-9 / +9	5	✓ Full exchange observed
09-30 15:37	80m	-15 / -	R4HHN	-15 / +3	4	✓ Closing observed
09-30 15:37	80m	- / +1	UA4QK	-10 / -	2	Partial capture
09-29 13:41	40m	- / -3	LZ3CB	+10 / -	3	✓ Closing fragment
09-13 17:29	40m	-11 / -	R3DIK/M	- / +4	2	Partial capture
09-11 17:44	80m	-15 / +9	RA4CQW/P	-15 / -5	2	Partial capture
09-11 17:30	80m	-11 / 0	RU4I	-3 / -5	4	✓ Full exchange observed
09-08 03:36	40m	- / -11	RX6ACJ	-7 / -	3	✓ Closing fragment
09-05 15:19	40m	- / -1	R9CS/P	+2 / -	2	✓ Closing fragment
09-04 15:44	40m	-16 / -7	RM6OG	-20 / -13	2	Partial capture
09-04 15:39	40m	- / -18	R4PEQ	-4 / -	5	Partial capture
09-02 17:29	80m	- / -9	RM5F	0 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
174100 -12 2208  RA9SBN RA4PKA R+01 (x3)
174230 -16 2208  R6DJR RA4PKA R-19
174315 -10 2200  RA4PKA R6DJR RR73
174445 -10 2208  CQ RA4PKA LO64 (x2)
174530  -4 2208  RA4PKA DL5MRK JO61
174615  -9 2208  CQ RA4PKA LO64
174630 -10 2542  RA4PKA RT3K -13
174645 -23 2208  RT3K RA4PKA R-16
174700  -4 2542  RA4PKA RT3K RR73
174715 -20 2208  RT3K RA4PKA 73
174745 -22 2208  CQ RA4PKA LO64 (x2)

40m

UTC    dB Audio  Message
133800  -5 2637  RA4PKA OK2CNI JN79
153615 -13 2439  CQ RA4PKA LO64
135100  -2 2412  RA4PKA RA3LBW KO64
135100 -15 1095  RA4PKA R1BRY KO49 (x2)
135330  -6 2410  RA4PKA RA3LBW 73
135430  -4 2411  RA4PKA OE6TNO JN77 (x9)

160m

UTC    dB Audio  Message
162800  +0 1947  RA4PKA RW1C KO49 (x3)
170800 -17 2102  RA4PKA UA4FKT LO23 (x3)
171230 -21 2351  RA4PKA R4DS RR73
171930  -4  984  RA4PKA RA7T -19 (x2)
174015 -18 2208  RA4PKA RA4Y LO35 (x3)
152530 -10  641  RA4PKA R9CS/P RR73
154330 -10 2102  RA4PKA RZ6BS KN96
154530 -17  897  RA4PKA R3RAF LO02

20m

UTC    dB Audio  Message
142015  -6 2532  RA4PKA DL1EDR R+04 (x3)
142615  -6 2491  RA4PKA SV2AEL KN10 (x3)
142230 -16 2359  <...> RA4PKA +12 (x2)
045000 -18 2171  CQ RA4PKA LO64
045015 -11 2170  RA4PKA R4PHH LO64
045030 -19 2170  RD1A RA4PKA R-18
045045 -14 2170  RA4PKA R4PHH LO64
045100 -14 2171  RD1A RA4PKA R-18
045200 -17 2171  R4PHH RA4PKA -14
050345 -18 2124  R8QA/M RA4PKA +00

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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