JA7ZF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan

Receiver-side FT8 activity involving JA7ZF, decoded by SO8OO in southeastern Poland. 182 related FT8 messages, observed on 40m, 20m, 10m, across 30 UTC dates. Heard between 2026-05-26 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

182
Related messages
0
CQ messages
30
UTC dates heard
-8 dB
Mean decoder S/N

Bands

First seen: 2026-05-26
Last seen: 2026-08-23 19:33 UTC

Activity Heatmap

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 UTCBandJA7ZF S/NCounterpartCounterpart S/NMsgsCapture
08-22 20:26 40m - / -1 SP6JIU +18 / - 2 ✓ Closing fragment
08-22 20:26 40m - / - DL8LE -1 / - 6 Partial capture
08-22 20:26 40m - / - OK1UG -4 / - 2 Partial capture
08-22 20:24 40m -22 / -13 YT3ZT -6 / -17 4 ✓ Full exchange observed
08-16 21:32 20m - / -13 HB9TIH -16 / - 5 Partial capture
08-11 21:50 20m - / -10 CR5VP -10 / - 2 ✓ Closing fragment
08-11 21:47 20m - / - CT1FIU -15 / - 3 Partial capture
08-11 21:41 20m - / -3 IK1VHR -8 / - 9 Partial capture
08-11 21:39 20m - / -2 I5HLK -8 / - 9 Partial capture
08-11 21:39 20m - / - OE3HPT -12 / - 6 Partial capture
08-11 21:35 20m - / -8 CR5VP -11 / - 2 Partial capture
08-10 09:56 20m - / -5 GW8PSJ -8 / - 3 ✓ Closing fragment
08-04 19:43 40m - / -25 SP2FWC -6 / - 5 ✓ Closing fragment
08-04 19:42 40m - / -10 YO8PS -10 / - 2 ✓ Closing fragment
08-04 19:21 20m - / - IT9VCE -13 / - 2 Partial capture
08-03 21:06 40m - / -13 A71XX -11 / - 3 ✓ Closing fragment
08-03 20:49 40m - / -18 UA4FKT -12 / - 3 ✓ Closing fragment
08-02 20:10 40m - / -13 UA3ZNQ -6 / - 2 ✓ Closing fragment
07-31 20:02 40m - / -20 UZ5CA -9 / - 6 ✓ Closing fragment
07-27 20:18 20m - / - IU0VOG -5 / - 3 Partial capture
07-27 20:14 20m -15 / -21 G0VLF -11 / - 12 ✓ Closing observed
07-27 20:13 20m - / -12 MM8WXA -4 / - 2 ✓ Closing fragment
07-24 21:30 20m - / -13 IZ2QGB -2 / - 3 ✓ Closing fragment
07-24 21:29 20m - / -14 EI5HV -10 / - 2 ✓ Closing fragment
07-20 21:18 20m -22 / - OH3AA - / -4 2 ✓ Closing fragment
07-19 19:41 20m -22 / -11 DK1STE +1 / -9 5 ✓ Full exchange observed
07-18 20:53 20m - / - SM3ULU -14 / - 2 Partial capture
07-18 20:36 20m - / - EA3JHT -19 / - 2 Partial capture
07-15 21:21 20m - / - SV2SCB -18 / - 3 Partial capture
07-10 20:42 20m - / - DG6VC -14 / - 2 ✓ Closing fragment
07-07 20:59 20m -14 / -12 MI6YHI -23 / -13 3 Partial capture
06-30 19:33 40m - / -18 UT2VX +6 / - 4 ✓ Closing fragment
06-29 20:13 20m -20 / -6 DF3MC -11 / - 10 ✓ Closing observed
06-29 20:07 20m - / - M0XCZ -1 / - 4 Partial capture
06-28 19:45 20m -13 / - LU2AHD - / -15 2 ✓ Closing fragment
06-28 19:44 20m -12 / -5 S55A 0 / -14 4 ✓ Full exchange observed
06-24 20:30 20m -11 / -5 UT5MD +9 / -3 6 ✓ Full exchange observed
06-15 21:02 20m -18 / -8 RA4FUT -12 / - 5 ✓ Closing observed
06-11 21:42 20m - / +3 BG2FYO -15 / - 2 ✓ Closing fragment
06-11 21:39 20m - / - BH4HGH -16 / - 2 ✓ Closing fragment
06-10 19:45 20m - / - G0GOO -12 / - 3 Partial capture
06-10 19:40 20m -3 / -7 OD5UI -5 / -8 6 ✓ Full exchange observed
06-04 20:05 20m +3 / - OK1UOZ - / -11 2 ✓ Closing fragment
06-04 19:57 20m - / - HB9EKJ -10 / - 3 Partial capture
06-04 19:56 20m +2 / - OJ0Z - / -9 11 Partial capture
06-04 19:53 20m - / - IZ2DPX +10 / - 3 Partial capture
06-04 19:52 20m 0 / - OJ0Z - / - 2 Partial capture
06-04 19:41 20m -9 / - OJ0Z - / - 9 Partial capture
05-31 20:31 20m -3 / - OJ0Z - / - 3 Partial capture
05-31 20:16 20m - / - EA5IDA +2 / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m
UTC    dB Audio  Message
214500 -10 1558  JA7ZF IK1VHR JN44 (x3)
214700 -15 1736  JA7ZF CT1FIU IN50 (x3)
215000 -10 1145  JA7ZF CR5VP -10 (x2)
213200 -18 1431  JA7ZF HB9TIH JN36
213200  +2 2151  JA7ZF EB3JT JN01
213230 -17 1431  JA7ZF HB9TIH JN36 (x4)
213345 -14 1285  JA7ZF EA6TU RR73
40m
UTC    dB Audio  Message
194700  -6  844  JA7ZF SP2FWC RR73
202400  -3 1890  JA7ZF YT3ZT -13 (x2)
202445 -21 1779  YT3ZT JA7ZF R-17 (x2)
202600  -2 1624  JA7ZF DL8LE JN68
202600  -4 1781  JA7ZF OK1UG JN89
202630  -3 1624  JA7ZF DL8LE JN68
202630 +22 2884  JA7ZF SP6JIU -01
202630  -3 1781  JA7ZF OK1UG JN89
202700  -3 1624  JA7ZF DL8LE JN68
202700 +15 2884  JA7ZF SP6JIU RR73
202730  -4 1624  JA7ZF DL8LE JN68 (x3)
10m
UTC    dB Audio  Message
104700 -11 2276  JA7ZF 7Q9PTP -02 (x2)

Decoder S/N history by band

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