OA4DOS — 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: Peru

Receiver-side FT8 activity involving OA4DOS, decoded by SO8OO in southeastern Poland. 29 FT8 messages attributed to this token as transmitter, on 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-07-29 and 2026-08-25.

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 29 FT8 messages attributed to OA4DOS 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 (100%). 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 -10 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-10 dB

Estimated median S/N

Bands

20m · 29

First attributed message: 2026-07-29
Last attributed message: 2026-08-25 03:59 UTC

Observed FT8 message patterns

Attributed sample: 29 messages
Active dates: 4 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -17 to +1 dB
Recurring-pattern threshold: Met

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

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 OA4DOS in decoded directed-looking exchanges:

F4JCU · France ×2 CT3MD · Madeira Islands DF3VG · Fed. Rep. of Germany DA1EA · Fed. Rep. of Germany E75C · Bosnia-Herzegovina EA4NW · Spain IU2VWQ · Italy OK1JAZ · Czech Republic RA3RGQ · European Russia RA4AG · European Russia RD4HD · European Russia RM4N · 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.

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	OA4DOS S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-09 04:47	40m	- / -	RA5BQ	-10 / -	5	Partial capture
10-09 04:46	40m	- / -	R6DZR	-11 / -	2	Partial capture
08-28 02:00	20m	- / -	SV5BYP	-17 / -	5	Partial capture
08-25 03:58	20m	-12 / -11	F4JCU	-15 / -11	6	✓ Full exchange observed
08-25 03:58	20m	-5 / -	WB5N	- / -12	2	✓ Closing fragment
08-25 03:56	20m	-16 / -	ZL1GT	- / -15	3	✓ Closing fragment
08-25 03:54	20m	-13 / -15	OD5ZZ	-11 / -16	3	Partial capture
08-25 03:05	20m	-11 / -	RA3RGQ	- / -11	2	✓ Closing fragment
08-25 03:01	20m	+1 / -	OK1JAZ	-6 / -18	5	✓ Closing observed
08-25 03:01	20m	-10 / -14	RA4AG	-12 / -18	6	✓ Full exchange observed
08-25 03:00	20m	-9 / -	E75C	- / -16	2	✓ Closing fragment
08-25 02:50	20m	-8 / -	CE4FOQ	- / -14	2	Partial capture
08-24 04:06	40m	- / -	OH1ZE	-10 / -	2	Partial capture
08-24 00:42	20m	- / -	EB8RO	-16 / -	2	Partial capture
08-23 18:07	10m	- / -12	CT3MD	-10 / -	3	✓ Closing fragment
08-23 04:16	20m	- / -16	RA3TKS	+6 / -	2	Partial capture
08-23 04:16	20m	-18 / -	UX0KR	- / -15	2	✓ Closing fragment
08-23 04:15	20m	- / -16	R3DFS	-15 / -	4	Partial capture
08-23 04:12	20m	- / -4	RW3FY	+5 / -	4	✓ Closing fragment
08-23 04:12	20m	- / -	YO3GNF	-1 / -	5	Partial capture
08-22 23:17	20m	- / -9	DA1EA	0 / -	8	✓ Closing fragment
08-22 23:13	20m	- / -	YT1UBN	-6 / -	12	Partial capture
08-22 23:12	20m	- / -	DA1EA	-2 / -	3	Partial capture
08-22 23:10	20m	- / -	YU2MMT	-16 / -	2	Partial capture
08-21 05:00	40m	- / -	DL2AXA	-12 / -	4	Partial capture
08-21 05:00	40m	- / -	PA3EZB	-13 / -	3	Partial capture
08-21 04:57	40m	- / -19	SP3QDM	+4 / -	3	✓ Closing fragment
08-21 04:56	40m	- / -	EA5HM	-13 / -	5	Partial capture
08-21 04:56	40m	- / -15	F5NBU	-14 / -	2	Partial capture
08-21 04:55	40m	- / -8	SP6JIU	+7 / -	2	✓ Closing fragment
08-21 04:44	40m	- / -13	DK8ZZ	+1 / -	2	✓ Closing fragment
08-15 21:03	160m	- / -	SP2LLP	0 / -	9	Partial capture
08-12 04:09	40m	- / -	PC2J	-15 / -	4	Partial capture
08-12 04:03	40m	- / -16	DL2RPN	-12 / -	5	✓ Closing fragment
08-10 23:47	20m	- / -19	IU2VWQ	-4 / -	4	✓ Closing fragment
08-10 03:33	20m	- / -	RK6AAC	-15 / -	2	Partial capture
08-10 03:32	20m	- / -13	UY5QJ	0 / -	5	✓ Closing fragment
08-08 04:56	20m	- / -	EA4NW	-9 / -	2	✓ Closing fragment
08-08 04:49	20m	- / -11	RA3TKS	+4 / -	3	Partial capture
08-08 04:49	20m	- / -20	EA1DP	-10 / -	2	Partial capture
08-08 04:44	20m	- / -15	RA3TKS	+3 / -	5	Partial capture
08-08 04:39	20m	- / -12	VK3TZ	-8 / -	3	✓ Closing fragment
08-08 04:38	20m	- / 0	RA4Y	-2 / -	3	Partial capture
08-08 04:28	20m	- / -11	UB4CJS	-8 / -	6	Partial capture
08-08 04:24	20m	- / -11	UB4CJS	-8 / -	3	✓ Closing fragment
08-08 04:19	20m	- / -	R6TA	+7 / -	6	Partial capture
08-08 04:15	20m	- / -12	RM4N	-8 / -	6	✓ Closing fragment
08-08 04:13	20m	- / -13	RD4HD	0 / -	7	✓ Closing fragment
08-08 04:09	20m	- / -14	UB4CJS	-13 / -	6	Partial capture
07-29 18:01	10m	- / -15	DF3VG	-6 / -	6	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
050100  -6 2126  OA4DOS DL2AXA JO50
050130 -10  670  OA4DOS PA3EZB JO22
050130 -13 2126  OA4DOS DL2AXA JO50 (x2)
055915 -16 1590  OA4DOS GJ0KYZ -19
040600 -12 2746  OA4DOS OH1ZE KP10 (x2)
044600 -20 2082  OA4DOS UN7LZ 73
044630 -12 1154  OA4DOS R6DZR KN84 (x2)
044730  -6 1345  OA4DOS RA5BQ KO96 (x5)

20m

UTC    dB Audio  Message
035745 -17 1594  ZL1GT OA4DOS RR73
035815  -5  554  WB5N OA4DOS -12
035830 -15 1569  OA4DOS F4JCU JN16
035845  -5  553  WB5N OA4DOS RR73
035900 -22  676  OA4DOS RA4FP -16
035900 -21 1569  OA4DOS F4JCU JN16
035915 -11 1515  F4JCU OA4DOS -11
035930 -11 1569  OA4DOS F4JCU R-11
035945 -12 1515  F4JCU OA4DOS RR73
040000 -13 1569  OA4DOS F4JCU 73
020030 -20 1819  OA4DOS SV5BYP KM46 (x5)

10m

UTC    dB Audio  Message
180115  -5 2902  OA4DOS SV4OZF -11
180115 -14 1889  OA4DOS DF3VG JN48
180145  -3 2903  OA4DOS SV4OZF -11
180145  -8 1889  OA4DOS DF3VG JN48
180215  +2 2903  OA4DOS SV4OZF -11
180215  -8 1889  OA4DOS DF3VG JN48
180245  +3 2903  OA4DOS SV4OZF -11
180245 -11 1889  OA4DOS DF3VG JN48
180315  -1 2903  OA4DOS SV4OZF -11
180315  -2 1889  OA4DOS DF3VG R-15
180345  +1 2903  OA4DOS SV4OZF -11
180345  +9  388  OA4DOS DF3VG 73
180730 -13 1223  OA4DOS CT3MD IM13 (x3)

160m

UTC    dB Audio  Message
210315  -3 1755  OA4DOS SP2LLP JO94 (x9)

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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