JH4IFF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Locator transmitted in a decoded message: PM74

Receiver-side FT8 activity involving JH4IFF, decoded by SO8OO in southeastern Poland. 564 related FT8 messages, 5 CQ messages, observed on 160m, 80m, 60m, 40m, 20m, 10m, across 49 UTC dates. Heard between 2026-05-25 and 2026-08-23.

These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.

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Overview

564

Related messages

CQ messages

UTC dates heard

-3 dB

Mean decoder S/N

Bands

80m 20m 40m 60m 10m 160m

First seen: 2026-05-25
Last seen: 2026-08-23 18:22 UTC

Frequent QSO partners observed at SO8OO

Stations JH4IFF worked most often, as logged from our receiver:

IQ7PU · Italy ×2 LZ3AN · Bulgaria ×2 SV1MOZ · Greece ×2 IQ0VT · Italy ×2 IQ7KM · Italy ×2 4L7T · Georgia SP5MXZ · Poland OH0ERF · Aland Islands IQ5AAR · Italy Z34K · North Macedonia SY3EWW · Greece EG5MYC · Spain

Activity Heatmap

Locator transmitted by JH4IFF

Approximate centre of PM74, decoded 2026-08-23 20:05 UTC. A transmitted locator is not proof of the operator's permanent location.

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	JH4IFF S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-23 20:22	40m	- / -	LA6TMA	-4 / -	2	Partial capture
08-23 20:21	40m	- / -	R6FFB	+5 / -	3	Partial capture
08-23 20:21	40m	- / -5	DK3ME	+5 / -	3	✓ Closing fragment
08-23 20:21	40m	- / -	IS0LYN	-11 / -	4	Partial capture
08-23 20:21	40m	- / -	UA6LIK	0 / -	3	Partial capture
08-23 20:20	40m	- / -9	RY3F	0 / -	2	✓ Closing fragment
08-23 20:19	40m	-6 / -11	DK2SW	-1 / -16	4	✓ Full exchange observed
08-23 20:11	40m	-14 / -13	II7MGBT	-8 / -	3	Partial capture
08-23 20:08	40m	-10 / -	SN40KZE	- / -12	2	Partial capture
08-23 20:06	80m	- / -	DK3ME	-4 / -	4	Partial capture
08-23 20:05	80m	-12 / -9	II7MGBA	-1 / -21	3	Partial capture
08-23 20:04	80m	- / -	IW8RRF	-11 / -	3	Partial capture
08-23 20:04	80m	- / -	SP7CMW	+10 / -	5	Partial capture
08-23 20:03	80m	- / -19	G4CDN	+4 / -	6	Partial capture
08-23 20:03	80m	-13 / -7	IK5CHL	+4 / -16	5	✓ Full exchange observed
08-23 20:01	80m	-8 / -	E75C	-4 / -	3	✓ Closing observed
08-21 20:22	40m	-12 / -6	ON4IQ	+14 / -1	5	✓ Full exchange observed
08-21 20:21	40m	-2 / -17	AO25FDM	-7 / -9	3	Partial capture
08-21 20:19	80m	- / -	OK4SD	0 / -	4	Partial capture
08-21 20:19	80m	- / -	SP2BBQ	+10 / -	3	Partial capture
08-21 20:17	80m	-14 / -12	UR5KC	+11 / -13	5	✓ Full exchange observed
08-21 20:16	80m	- / -22	UR5NPF	+12 / -	2	✓ Closing fragment
08-21 20:13	80m	- / -	SP5GW	+11 / -	5	Partial capture
08-21 20:12	80m	- / -10	OH5KNL	-2 / -	2	✓ Closing fragment
08-21 20:08	80m	- / -	SP1TJ	+2 / -	2	Partial capture
08-21 20:07	80m	- / -	DL7ACN	-5 / -	3	Partial capture
08-21 20:07	80m	-13 / -14	II7MGBA	+7 / -13	4	Partial capture
08-21 20:04	80m	- / -10	F8FUA	-4 / -	2	✓ Closing fragment
08-21 08:10	10m	- / -13	A71DA	-20 / -	2	✓ Closing fragment
08-20 20:25	40m	-8 / -	IZ7WMM	- / -	6	Partial capture
08-20 20:22	40m	-12 / -14	E74DKB	-1 / -	5	✓ Closing observed
08-20 20:19	40m	-11 / -5	EG5DX	-4 / -17	5	✓ Full exchange observed
08-20 20:16	40m	-10 / -	UT3RO	- / -12	2	✓ Closing fragment
08-20 20:15	40m	-12 / -10	F4ENK	+5 / -	5	✓ Closing observed
08-20 20:14	40m	-14 / -	IZ7WMM	- / -14	2	Partial capture
08-20 20:11	40m	-14 / -	YO5PLB	-7 / -18	3	✓ Closing observed
08-20 20:11	40m	- / -	PD0LBY	-2 / -	2	Partial capture
08-20 20:08	40m	-13 / -11	DF7AA	+2 / -22	7	✓ Full exchange observed
08-19 20:22	20m	-16 / -	OJ0YL	- / -	2	Partial capture
08-18 20:28	80m	- / -	OH3NXW	+16 / -	2	Partial capture
08-18 20:27	80m	-14 / -	E70SZ	- / -	2	Partial capture
08-18 20:27	80m	- / -	DK1MCS	-3 / -	7	Partial capture
08-18 20:26	80m	-21 / -13	PI4DX	+2 / -	3	✓ Closing observed
08-18 20:21	80m	-16 / -15	DL3MIB	+5 / -13	4	✓ Full exchange observed
08-18 20:21	80m	- / -	OH3NXW	+11 / -	2	Partial capture
08-18 20:19	80m	- / -12	R6ZEJ	-1 / -	3	Partial capture
08-18 20:19	80m	-16 / -	A93MO	- / -20	3	✓ Closing fragment
08-18 20:15	80m	-16 / -20	OM8GT	+17 / -20	8	✓ Full exchange observed
08-18 20:15	80m	-14 / -16	SP2LLP	+3 / -18	7	✓ Full exchange observed
08-18 20:15	80m	- / -18	SV8CKM	-8 / -	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
202100  +0 1933  JH4IFF UA6LIK LN08
202100  +4 2442  JH4IFF DK3ME JO50
202100  -9 2251  JH4IFF IS0LYN JN40
202130  +6 2442  JH4IFF DK3ME R-05
202130  +5 2139  JH4IFF R6FFB LN14
202130 -11 2250  JH4IFF IS0LYN JN40
202200  +0 1934  JH4IFF UA6LIK LN08
202200  +4 2139  JH4IFF R6FFB LN14
202200  -6 2714  JH4IFF LA6TMA JO59
202200  +5 2442  JH4IFF DK3ME 73
202200 -11 2251  JH4IFF IS0LYN JN40 (x2)
202230  +1 1934  JH4IFF UA6LIK LN08
202230  -3 2713  JH4IFF LA6TMA JO59
202230  +6 2139  JH4IFF R6FFB LN14

80m

UTC    dB Audio  Message
200500 -10 1802  II7MGBA JH4IFF PM74
200515  -9  887  JH4IFF IW8RRF JM88
200515  -1 1800  JH4IFF II7MGBA -09
200515 +14  950  JH4IFF SP7CMW KO01
200530 -13 1802  II7MGBA JH4IFF R-21
200615  +9 2352  JH4IFF SP7CMW KO01
200645  -9 2663  JH4IFF DL6FBR JN49
200645  -4 1802  JH4IFF DK3ME JO50
200645  +2 2123  JH4IFF G4CDN -17
200645 +11 2352  JH4IFF SP7CMW KO01
200715  +5 2123  JH4IFF G4CDN -17
200715  -4 1802  JH4IFF DK3ME JO50 (x3)
200845  +2 2124  JH4IFF G4CDN -17

10m

UTC    dB Audio  Message
091930 -19  491  JH4IFF RR73; JH4CPC <...> -12
092100 -13  879  JH4IFF 8Q7PR -12 (x2)
081045 -19 1590  JH4IFF A71DA -13 (x2)
082200  -4 1252  JH4IFF II7MGXX -12
082230  +8 1252  JH4IFF RR73; F4LZZ <...> +00
082600  -7 1787  JH4IFF TA6B -15

20m

UTC    dB Audio  Message
200430 -10 1030  SP5MXZ JH4IFF R-10 (x2)
200530 -10 1029  ON1JP JH4IFF R-14 (x4)
205200 -15 1991  JH4IFF OZ2SPACE -20 (x6)
202245 -20 1419  OJ0YL JH4IFF PM74 (x2)
202715  -9  509  <...> JH4IFF PM74

60m

UTC    dB Audio  Message
210730  +2 2507  JH4IFF OH2BGD KP20 (x4)

160m

UTC    dB Audio  Message
201630  +6 2739  JH4IFF DL4KSD JO71 (x2)

Decoder S/N history by band

Daily averages across messages associated with this profile as decoded at SO8OO.