DF3JO — 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: Fed. Rep. of Germany Most frequent locator attributed to this token: JO31

Receiver-side FT8 activity involving DF3JO, decoded by SO8OO in southeastern Poland. 1,234 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 59 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-23.

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 1,234 FT8 messages attributed to DF3JO as the transmitting token by decoded message structure across 59 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (37%), followed by 40 m (30%) and 20 m (17%). Most decodes (85%) fell within the six-hour window 19:00-01:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

1,234

Messages attributed

UTC dates decoded

247

Active 15-min windows

-10 dB

Estimated median S/N

Bands

160m · 453 80m · 137 60m · 28 40m · 367 20m · 213 10m · 36

First attributed message: 2026-06-07
Last attributed message: 2026-10-23 04:57 UTC

Observed FT8 message patterns

Attributed sample: 1,234 messages
Active dates: 59 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -20 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 334, moderate (-15 to -9 dB) 360, strong (≥ -8 dB) 540.

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 DF3JO in decoded directed-looking exchanges:

HA5AO · Hungary ×3 DD7EE · Fed. Rep. of Germany ×2 G7RAU · England ×2 IZ6ERS · Italy ×2 OE6AXG · Austria ×2 SP2GJI · Poland ×2 4Z5PT · Israel ×2 S55A · Slovenia ×2 CR7BUJ · Portugal 8S2C · Sweden 9A2AJ · Croatia 9A4ZM · Croatia

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 DF3JO

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: JO31 · 743 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,054 km (approx.)
Last such locator decoded: 2026-10-23 04:56 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	DF3JO S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-23 15:40	10m	- / -6	CR7BUJ	-6 / -	2	✓ Closing fragment
10-23 04:56	80m	-24 / -7	SP7VCL	+1 / -11	7	✓ Full exchange observed
10-23 04:40	80m	-8 / -9	LZ936BA	-16 / +6	5	Partial capture
10-23 04:30	80m	-10 / -3	HB9IRO	-2 / -6	6	✓ Full exchange observed
10-22 23:29	40m	- / -12	4Z5PT	-14 / -	2	✓ Closing fragment
10-22 22:54	160m	-20 / -	R6DAZ	- / -	2	Partial capture
10-22 22:32	40m	- / -10	TA2VUZ	-19 / -	2	✓ Closing fragment
10-22 22:22	160m	-16 / -	R6DAZ	- / -	2	Partial capture
10-22 05:13	160m	-19 / -12	OZ1BLP	-12 / -	3	✓ Closing observed
10-22 05:07	160m	- / +1	PA3EVY	-4 / -	2	✓ Closing fragment
10-22 04:45	160m	-17 / -9	DA125RH	+5 / -	2	Partial capture
10-22 03:37	160m	-20 / -	RA3ZGT	- / -	3	Partial capture
10-22 03:22	160m	-21 / +1	SM3JGG	+5 / -18	4	✓ Full exchange observed
09-29 00:13	80m	- / -11	DO8JB	-8 / -	2	✓ Closing fragment
09-29 00:10	80m	-11 / -7	DA6OOM	-12 / -6	3	Partial capture
09-29 00:01	80m	-21 / +4	DD4U	-4 / +2	4	✓ Full exchange observed
09-28 23:50	80m	-14 / 0	SO100PKP	+4 / -10	3	Partial capture
09-28 22:35	40m	+3 / -	WV2B	- / -	3	Partial capture
09-28 22:32	40m	+7 / -	F4CQS	- / -	4	Partial capture
09-28 22:31	40m	-5 / -	WV2B	- / -	2	Partial capture
09-28 22:27	80m	- / -2	DD4U	+1 / -	3	Partial capture
09-28 22:21	40m	+2 / -	BD8FOD	- / -	2	Partial capture
09-28 22:19	40m	-4 / -	KB1HY	-16 / -8	5	✓ Closing observed
09-28 22:18	160m	-22 / -	DO5SB	- / -	3	Partial capture
09-28 22:16	160m	-4 / -16	HA5AO	+18 / -2	5	✓ Full exchange observed
09-28 22:08	40m	+9 / -	SX2LGT	- / -14	2	✓ Closing fragment
09-28 22:05	40m	-7 / -	GM6URC	- / -9	3	✓ Closing fragment
09-28 21:48	160m	-20 / -	IZ8WGR	- / -	2	Partial capture
09-28 00:15	160m	-18 / -	ER3PM	- / -	8	Partial capture
09-27 23:35	160m	-16 / -3	SP3GTP	+12 / +5	6	✓ Full exchange observed
09-27 21:36	160m	-6 / -18	HA5AO	+17 / -2	5	✓ Full exchange observed
09-27 21:34	160m	-16 / -3	DD7EE	+1 / +2	5	✓ Full exchange observed
09-26 23:18	160m	-12 / -	LZ7VV	- / -	2	Partial capture
09-26 23:14	160m	-13 / -7	LA9JKA	-11 / -	12	✓ Full exchange observed
09-26 23:14	160m	-6 / -14	HA5AO	+14 / -1	5	✓ Full exchange observed
09-26 23:12	160m	-16 / -	LZ7VV	- / -	3	Partial capture
09-26 23:07	160m	-10 / -	LZ7VV	- / -	2	Partial capture
09-26 20:27	40m	-3 / -	UF4S/P	- / -	5	Partial capture
09-26 20:22	40m	-2 / -	TA7MMI	- / +2	7	Partial capture
09-26 20:21	40m	-1 / -	SP3ATB	- / -	2	Partial capture
09-26 20:19	40m	+3 / -	SP4MPH	- / -15	3	✓ Closing fragment
09-26 20:14	40m	0 / -	SQ9BDB	- / -	3	Partial capture
09-26 20:12	40m	-6 / -	MI7JUX	- / -1	3	✓ Closing fragment
09-26 20:07	40m	-4 / -	TA7MMI	- / -	3	Partial capture
09-26 20:04	40m	-7 / -	MM0DXL	- / +1	3	✓ Closing fragment
09-26 20:01	40m	-2 / -	LZ2PAJ	- / -6	2	Partial capture
09-26 19:58	40m	+1 / -	EA1BL	-18 / 0	6	✓ Closing observed
09-26 19:53	40m	-2 / -	TA7MMI	- / -5	7	Partial capture
09-26 19:46	40m	-9 / -	2E0TZW	- / +2	3	✓ Closing fragment
09-26 19:45	40m	-4 / -	SM6VAG	- / +8	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
103715 -12 2343  DF3JO IQ4JO -02
103600 -17 1202  LZ2HY DF3JO JO31 (x2)
104115 -15 2294  LZ1EV DF3JO JO31 (x2)
105745  -9  558  TL8GD DF3JO JO31
154000  -5 1226  DF3JO CR7BUJ -06 (x2)

80m

UTC    dB Audio  Message
043100 -10 1390  HB9IRO DF3JO R-06
043115  -4 1413  DF3JO HB9IRO RR73
043130  -9 1390  HB9IRO DF3JO 73
044015  -7 1630  LZ936BA DF3JO JO31
044030 -15 1630  DF3JO LZ936BA -09
044045  -6 1631  LZ936BA DF3JO R+06
044100 -16 1630  DF3JO LZ936BA -09
044115 -12 1631  LZ936BA DF3JO R+06
045600 -24 1808  SP7VCL DF3JO JO31
045615  -2 1808  DF3JO SP7VCL -07
045630 -24 1808  SP7VCL DF3JO R-11
045645  +2 1808  DF3JO SP7VCL RR73
045700 -24 1808  SP7VCL DF3JO 73
045715  -1 1808  DF3JO SP7VCL RR73 (x2)

40m

UTC    dB Audio  Message
223030  -1 1138  N4NF DF3JO JO31
223100  -7 1109  WV2B DF3JO JO31 (x2)
223245  +4  982  F4CQS DF3JO JO31 (x4)
223500  +1 1110  WV2B DF3JO JO31 (x3)
223245 -20 1821  DF3JO TA2VUZ -10 (x2)
232930 -14  988  DF3JO 4Z5PT -12 (x2)
043815 -19 1936  DF3JO SV1ONU -07

160m

UTC    dB Audio  Message
033730 -16 1405  RA3ZGT DF3JO JO31 (x2)
034600 -19 1654  R6OBN DF3JO JO31
044530  +5 1358  DF3JO DA125RH -09
044545 -17 1358  DA125RH DF3JO R+18
050600 -21 1307  DF3JO OZ1BEC RR73
050715  -4 1447  DF3JO PA3EVY +01 (x2)
051330 -19 1198  OZ1BLP DF3JO JO31
051345 -14 1199  DF3JO OZ1BLP -12 (x2)
222230 -19 1579  R6DAZ DF3JO JO31 (x4)

60m

UTC    dB Audio  Message
225815 -16 1360  DF3JO DF4FS RR73
225830  -9 1361  DF4FS DF3JO 73
160000 -20 1812  OE6NIG DF3JO JO31
160015 -12 1812  DF3JO OE6NIG +03
160030 -20 1812  OE6NIG DF3JO R+03
160045  -8 1812  DF3JO OE6NIG RR73
160100 -19 1812  OE6NIG DF3JO 73
160145 -20 1237  DF3JO ON6AA R+00
160200 -15 1237  ON6AA DF3JO RR73
160215 -16 1236  DF3JO ON6AA 73
161115 -15 1196  DF3JO DL4YDR +07 (x2)
161430 -13 1334  IU1FFU DF3JO JO31 (x3)

20m

UTC    dB Audio  Message
194015  -4 2280  DF3JO EA2WX -11 (x2)
194300  +0 2316  DF3JO IQ4JO RR73
194730 -16 1280  DF3JO F5SFT +00
200445 -16 2307  DF3JO YO3RU RR73
203130 -20 2177  ND1X DF3JO JO31
203315  -8 1210  VY2SHL DF3JO JO31
203400 -19 1819  DF3JO PT7BI -13 (x2)
204745 -23 1210  VY2SHL DF3JO JO31
205445 -19 1053  W4DXR DF3JO JO31
211800 -15 1269  K4CVI DF3JO JO31
222400 -13 1167  DF3JO 8Z1IT +01 (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

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