IW4DV — 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: Italy Most frequent locator attributed to this token: JN54

Receiver-side FT8 activity involving IW4DV, decoded by SO8OO in southeastern Poland. 1,747 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 59 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-19.

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 1,747 FT8 messages attributed to IW4DV as the transmitting token by decoded message structure across 59 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (63%), followed by 20 m (19%) and 60 m (11%). Most decodes (56%) fell within the six-hour window 02:00-08:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (88%); the estimated median was +1 dB.

Overview

1,747

Messages attributed

UTC dates decoded

178

Active 15-min windows

+1 dB

Estimated median S/N

Bands

80m · 95 60m · 200 40m · 1,098 20m · 339 10m · 15

First attributed message: 2026-06-06
Last attributed message: 2026-10-19 18:03 UTC

Observed FT8 message patterns

Attributed sample: 1,747 messages
Active dates: 59 UTC dates
Estimated median S/N: +1 dB
Estimated 10th-90th percentile: -9 to +12.7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 42, moderate (-15 to -9 dB) 160, strong (≥ -8 dB) 1,545.

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 IW4DV in decoded directed-looking exchanges:

WF1B · United States ×3 BG7BMG · China ×2 RY9W · Asiatic Russia ×2 ON1DGN · Belgium ×2 RV4CC · European Russia ×2 W4CHA · United States ×2 BA3NZ · China BD6AHP · China BG6WFY · China BG7KEO · China BG7ZHS · China BG8KVL · China

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 IW4DV

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: JN54 · 846 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,013 km (approx.)
Last such locator decoded: 2026-10-19 18:03 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	IW4DV S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-19 17:59	60m	-4 / +7	OZ5AGJ	-17 / +5	6	✓ Full exchange observed
10-19 17:57	60m	-2 / +4	DL2YMG	-10 / +2	6	✓ Full exchange observed
10-19 17:56	60m	0 / -	SP1RKT	-20 / -6	4	✓ Closing observed
10-19 17:54	60m	0 / +8	HA5AZD	+1 / -	7	✓ Full exchange observed
10-19 17:54	60m	-1 / -	S58X	-8 / -	5	✓ Full exchange observed
10-19 17:51	60m	-1 / -	OH7MFO	- / -	3	Partial capture
10-15 16:27	40m	-1 / +6	DD3ZZ	-6 / -	2	Partial capture
10-15 16:26	40m	-2 / -10	R4WZ	-8 / -	4	✓ Closing observed
10-15 03:47	40m	+3 / -	KB5YNF	- / -15	5	✓ Closing fragment
10-15 03:44	40m	-3 / -	WV8U	- / -	3	Partial capture
10-14 18:29	40m	+22 / -	BH4ECL	- / -20	2	Partial capture
10-14 18:27	40m	- / -	IW1DQS	-3 / -	3	Partial capture
10-14 18:27	40m	+22 / -	JH1CTV	- / -21	4	✓ Closing fragment
10-14 18:25	40m	+18 / +9	UN0GY	-5 / -6	6	✓ Full exchange observed
10-14 17:00	40m	- / -	DF7NO	-2 / -	8	Partial capture
10-14 16:58	40m	+4 / -	BG0FQU	- / -9	3	✓ Closing fragment
10-14 16:56	40m	+4 / -	9M2SWI	- / -10	3	✓ Closing fragment
10-14 16:55	40m	+1 / -	RY9W	- / -3	2	Partial capture
10-14 16:53	40m	+3 / -	VJ6X	- / -15	3	✓ Closing fragment
10-11 03:34	40m	+4 / -	R8LCA	- / -15	2	✓ Closing fragment
10-11 03:33	40m	- / 0	DK8HC/P	-9 / -	3	Partial capture
10-11 03:32	40m	0 / +8	SV5BYP	-9 / +4	5	✓ Full exchange observed
10-11 03:31	40m	+3 / -	W3T	- / -12	3	✓ Closing fragment
10-11 03:29	40m	-4 / -	9H6C	- / +8	2	✓ Closing fragment
09-29 16:30	40m	+5 / -	YD2DFO	- / -	2	Partial capture
09-28 15:21	40m	+3 / -	IV3IPA	- / -	3	Partial capture
09-28 14:17	40m	+4 / -	DL8RO	- / +3	3	✓ Closing fragment
09-27 14:52	40m	+2 / -	IU4PPL	- / +3	2	✓ Closing fragment
09-27 14:51	40m	-3 / -	DL7UVO	- / -	5	Partial capture
09-27 14:49	40m	-3 / -	DL0GEO	- / -18	3	✓ Closing fragment
09-27 14:46	40m	-8 / -	PA2RIC/P	- / -14	5	✓ Closing fragment
09-26 18:49	60m	-5 / -	DJ7BU	-9 / -	5	✓ Full exchange observed
09-26 18:49	60m	-6 / -7	TA3GO	-16 / +4	4	✓ Full exchange observed
09-26 18:47	60m	-4 / -4	DL2OAM	-11 / -12	4	✓ Full exchange observed
09-26 18:44	60m	-4 / -	IU5VLU	-8 / -	3	Partial capture
09-26 18:42	60m	-5 / +1	IK2VFR/P	-4 / -	5	✓ Full exchange observed
09-26 18:40	80m	-2 / -3	G0NIG	-12 / -	4	✓ Closing observed
09-26 18:37	80m	-1 / -	R2EA/P	- / -11	4	Partial capture
09-26 18:35	80m	-4 / +9	DA6NEL	-6 / +9	5	✓ Full exchange observed
09-26 08:44	40m	-6 / -	OM1DLC/P	-8 / +8	3	Partial capture
09-26 03:22	40m	-2 / -10	R9WJ	-19 / -	3	Partial capture
09-26 03:20	40m	+2 / -	WF1B	- / -18	2	✓ Closing fragment
09-26 03:19	40m	0 / -	NR0K	- / -12	2	✓ Closing fragment
09-26 03:14	40m	+5 / -	WB6IPQ	- / -4	2	✓ Closing fragment
09-26 03:13	40m	+2 / -	WA2HIP	- / -16	2	✓ Closing fragment
09-26 03:08	40m	+1 / -	PD1HBL	- / -24	3	✓ Closing fragment
09-26 03:07	40m	0 / -	AI4FR	- / -24	2	✓ Closing fragment
09-26 03:05	40m	+5 / -	SK3GA	- / -12	2	✓ Closing fragment
09-26 03:01	40m	+4 / -	N1NRL	- / -6	6	✓ Closing fragment
09-26 03:00	40m	-2 / -	AD9AR	- / -21	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
175830  +1 1634  DL2YMG IW4DV +02
175845 -10 1575  IW4DV DL2YMG R+04
175900  -5 1634  DL2YMG IW4DV RR73
175915 -10 1575  IW4DV DL2YMG 73
175930  -5 1634  CQ IW4DV JN54
175945 -14 1634  IW4DV OZ5AGJ JO47
180000  -6 1634  OZ5AGJ IW4DV +05
180015 -18 1634  IW4DV OZ5AGJ R+07
180030  -4 1634  OZ5AGJ IW4DV RR73
180045 -18 1634  IW4DV OZ5AGJ 73
180100  +0 1634  CQ IW4DV JN54
180130  -3 1634  OZ5AGJ IW4DV -13
180200  -6 1634  CQ IW4DV JN54 (x3)

40m

UTC    dB Audio  Message
034400 -16 1540  IW4DV F4HKP JN18
034415  -8 2125  WV8U IW4DV JN54 (x3)
034715  -4 2125  KB5YNF IW4DV R-15 (x5)
162645  -3  969  R4WZ IW4DV JN54 (x2)
162730  -6  452  IW4DV R4WZ -10
162745  -1  968  DD3ZZ IW4DV JN54
162800 -10  452  IW4DV R4WZ RR73
162800  -6 1836  IW4DV DD3ZZ +06

80m

UTC    dB Audio  Message
183530  -9 1450  IW4DV E75D -14
183530  +2 1592  IW4DV DA6NEL JO60
183545  -6 1592  DA6NEL IW4DV +09
183600  -3 1591  IW4DV DA6NEL R+09
183615  -1 1592  DA6NEL IW4DV RR73
183630 -17 1592  IW4DV DA6NEL 73
183715  -2 1592  OK1HRP/P IW4DV JN54
183745  +0 1592  R2EA/P IW4DV JN54 (x4)
184045  -6 1627  G0NIG IW4DV JN54
184100  -8  888  IW4DV G0NIG -03 (x2)
184145  +1 1627  G0NIG IW4DV 73

20m

UTC    dB Audio  Message
162515 -10 1392  E24YQO IW4DV JN54
162730  +3 2305  <...> IW4DV R-11
164115  +6 2462  BG7BMG IW4DV JN54 (x4)
164315 +11 2461  BA3NZ IW4DV JN54 (x4)
195115  -2 2247  VE1WT IW4DV JN54
102015  +8 1795  M9ORB IW4DV JN54
102100  -6  953  IW4DV M9ORB +13 (x2)
102330  +2 2703  F5OYA/P IW4DV JN54

10m

UTC    dB Audio  Message
102115  -8 1294  <...> IW4DV R+00 (x3)
102445  -3 1295  R2EA/P IW4DV JN54 (x3)

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

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee