OL900JAR — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Czech Republic

Receiver-side FT8 activity involving OL900JAR, decoded by SO8OO in southeastern Poland. 1,001 related FT8 messages, 268 CQ messages, observed on 160m, 80m, 60m, 40m, 20m, across 16 UTC dates. Heard between 2026-06-20 and 2026-07-31.

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.

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

Overview

1,001
Related messages
268
CQ messages
16
UTC dates heard
-4 dB
Mean decoder S/N

Bands

80m 20m 40m 60m 160m
First seen: 2026-06-20
Last seen: 2026-07-31 21:59 UTC

Frequent QSO partners observed at SO8OO

Stations OL900JAR worked most often, as logged from our receiver:

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 UTCBandOL900JAR S/NCounterpartCounterpart S/NMsgsCapture
07-31 23:24 80m +1 / - <...> +8 / - 8 ✓ Closing fragment
07-31 20:43 40m - / -12 HA7TM 0 / - 2 Partial capture
07-31 20:42 40m - / - <...> -5 / - 3 ✓ Closing fragment
07-31 19:23 20m - / - <...> -16 / - 2 ✓ Closing fragment
07-31 19:00 20m - / - R4HEA -4 / - 2 Partial capture
07-31 14:54 20m - / - <...> -6 / - 2 ✓ Closing fragment
07-31 14:53 20m - / -24 RX3VF -3 / - 3 Partial capture
07-25 19:23 20m - / -13 JA4LXY -3 / - 3 Partial capture
07-24 22:10 80m +3 / -5 HA0OH +17 / +6 6 Partial capture
07-24 22:07 80m -1 / - <...> -9 / - 4 ✓ Closing fragment
07-24 22:05 80m - / -6 DL9ATW -7 / - 5 Partial capture
07-24 22:03 80m +2 / -6 HB9MZI -14 / -9 11 Partial capture
07-24 22:00 80m +2 / - <...> -1 / - 4 ✓ Closing fragment
07-24 21:59 80m - / - HB9MZI -13 / - 3 Partial capture
07-24 21:57 80m +4 / +3 DC2SF +4 / +1 4 Partial capture
07-21 19:26 80m +5 / - <...> -10 / - 2 ✓ Closing fragment
07-21 19:26 80m +4 / -2 DF4LB -11 / 0 2 Partial capture
07-21 19:22 80m - / - F5PBG -16 / - 3 Partial capture
07-21 19:20 80m -4 / - <...> -1 / - 4 ✓ Closing fragment
07-21 19:18 80m -1 / - <...> +11 / - 2 ✓ Closing fragment
07-21 19:17 80m -6 / - DO3HUM -6 / -7 6 Partial capture
07-21 19:15 80m -4 / - <...> +7 / - 2 ✓ Closing fragment
07-21 19:12 80m -3 / - DH1JAD - / -5 4 Partial capture
07-21 19:11 80m -5 / - <...> -4 / - 2 ✓ Closing fragment
07-21 19:10 80m -6 / +3 SQ9LFQ -3 / - 4 Partial capture
07-21 19:09 80m -2 / - <...> +7 / - 2 ✓ Closing fragment
07-21 19:07 80m -2 / -10 RC2DD +5 / +2 6 Partial capture
07-21 17:43 40m - / -13 DL1VJL -6 / - 2 Partial capture
07-21 17:21 20m -13 / - OY1R - / -9 4 Partial capture
07-21 16:52 20m - / - <...> -4 / - 2 ✓ Closing fragment
07-21 16:32 40m - / -2 3Z0L -1 / - 2 Partial capture
07-19 12:45 20m -13 / - <...> -18 / - 6 ✓ Closing fragment
07-19 12:42 20m -16 / - <...> - / - 3 Partial capture
07-19 07:32 20m -16 / - <...> -12 / - 3 ✓ Closing fragment
07-19 07:23 20m - / - <...> -13 / - 3 ✓ Closing fragment
07-18 23:16 80m - / -4 OK5AC +13 / - 3 Partial capture
07-18 23:15 80m -15 / - <...> +16 / - 2 ✓ Closing fragment
07-18 23:02 80m -9 / - <...> -4 / - 4 ✓ Closing fragment
07-18 21:32 80m -15 / - <...> -20 / - 2 ✓ Closing fragment
07-18 21:26 80m -10 / - OE3BHM - / +10 2 Partial capture
07-18 21:17 80m -4 / - <...> - / - 5 Partial capture
07-18 21:13 80m -8 / -21 DM4SH +2 / - 4 Partial capture
07-18 21:12 80m -4 / - <...> +10 / - 4 ✓ Closing fragment
07-18 21:11 80m -8 / -4 SP6FME +16 / - 4 Partial capture
07-18 20:56 40m -11 / - <...> -3 / - 2 ✓ Closing fragment
07-18 20:47 40m - / +4 YL3MM -7 / - 3 Partial capture
07-18 20:38 40m - / - <...> -12 / - 3 ✓ Closing fragment
07-18 20:38 40m - / -13 PC2J -13 / - 3 Partial capture
07-16 20:56 40m -13 / - <...> -11 / - 2 ✓ Closing fragment
07-16 20:53 80m +13 / - UA4FET - / +2 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
212145 -14 1159  OL900JAR <...> 73 (x6)
221445 -17 1551  OL900JAR DK5ON +29
162615 -14 1784  OL900JAR <...> 73 (x2)
204345  +1 1443  OL900JAR HA7TM KN07 (x2)
204445  +0 1442  OL900JAR <...> 73 (x2)
234300 -22 1592  <...> OL900JAR
235915  +1 2370  OL900JAR <...> 73
80m 
UTC    dB Audio  Message
221130  +1  969  HA0OH OL900JAR R+06 (x5)
232400  -5 1261  CQ OL900JAR
232430  +9  403  <...> OL900JAR
232445  +7  403  OL900JAR IK4LZH -16
232515  +8  402  OL900JAR <...> RR73
232530  +7  403  <...> OL900JAR 73 (x6)
20m 
UTC    dB Audio  Message
133545 -19 1494  OL900JAR <...> 73 (x3)
145315  -2 2216  OL900JAR RX3VF LO06 (x3)
145445  -7 2217  OL900JAR <...> 73 (x4)
190015  -4 2180  OL900JAR R4HEA LO53 (x2)
191715 -12 2266  OL900JAR <...> 73 (x3)
160m 
UTC    dB Audio  Message
210415  +6 1911  9A4ZM OL900JAR +11
210430  +0 1907  OL900JAR 9A4ZM R+05
210445  +7 1911  <...> OL900JAR RR73
210515  +6 1911  CQ OL900JAR (x2)
210615  +8 1911  OM2WQ OL900JAR +14
210645  +7 1911  <...> OL900JAR RR73
210700 -11 1980  <OL900JAR> OZ1FHU JO55
210700  +3 1400  OL900JAR <...> 73
210715  +4 1911  OZ1FHU OL900JAR -03
210730  -8 1980  OL900JAR OZ1FHU R+06
210745  +4 1911  <...> OL900JAR RR73
210800  -9 1980  OL900JAR <...> 73
210815  +0 1911  CQ OL900JAR (x2)
60m 
UTC    dB Audio  Message
205415  +1 1931  <...> OL900JAR 73
205430  +1 1102  OL900JAR 3Z0L JO81
205445  +3 1931  3Z0L OL900JAR +05
205530  -1 1101  OL900JAR <...> 73
205615  +3 1931  CQ OL900JAR
205615  +3 1102  OL900JAR 3Z0L JO81
205645  -4 1931  F4PAN OL900JAR +00
205645  -3 1102  OL900JAR 3Z0L JO81
205715  -2 1931  <...> OL900JAR RR73
205715  -1 1102  OL900JAR 3Z0L R-07
205730  -5  970  OL900JAR <...> 73
205815 +11 1931  CQ OL900JAR (x2)
205915  +4 1932  G0JDK OL900JAR +01
205945  +1 1932  <...> OL900JAR RR73

Decoder S/N history by band

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