W4QJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FM05

Receiver-side FT8 activity involving W4QJ, decoded by SO8OO in southeastern Poland. 29 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-08-08 and 2026-09-16.

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 29 FT8 messages attributed to W4QJ as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (79%), followed by 20 m (21%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (66%); the estimated median was -22 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-22 dB

Estimated median S/N

Bands

80m · 23 20m · 6

First attributed message: 2026-08-08
Last attributed message: 2026-09-16 00:21 UTC

Observed FT8 message patterns

Attributed sample: 29 messages
Active dates: 5 UTC dates
Estimated median S/N: -22 dB
Estimated 10th-90th percentile: -24 to -8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 19, moderate (-15 to -9 dB) 6, strong (≥ -8 dB) 4.

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 W4QJ in decoded directed-looking exchanges:

PA1AA · Netherlands TN8GD · Republic of the Congo HB9CXZ · Switzerland HK3X · Colombia KP2B · US Virgin Islands MI7XHT · Northern Ireland PI4DX · Netherlands

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 W4QJ

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: FM05 · 17 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,754 km (approx.)
Last such locator decoded: 2026-09-16 00:20 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	W4QJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 00:20	80m	-23 / -	HK3X	- / -	2	✓ Closing fragment
09-12 01:00	80m	- / -17	ON6AA	+6 / -	3	Partial capture
08-24 22:36	20m	-9 / -	OK8DJ	- / -14	5	Partial capture
08-24 22:34	20m	- / -	DC5RE	-9 / -	3	Partial capture
08-24 22:32	20m	-8 / -8	PA1AA	-12 / -2	5	✓ Full exchange observed
08-13 01:00	80m	- / -	EA7AH	-12 / -	4	Partial capture
08-13 00:57	80m	-14 / -	DR800WE	- / +6	2	Partial capture
08-13 00:55	80m	-16 / -	PI4DX	- / -	3	✓ Closing fragment
08-10 01:18	80m	-24 / -	CE8EIO	- / -	2	Partial capture
08-10 00:57	80m	-22 / -	OH1MLZ	- / -18	9	Partial capture
08-10 00:55	80m	- / -17	HB9CXZ	+10 / -	2	✓ Closing fragment
08-10 00:54	80m	-24 / -	MI7XHT	+6 / -	2	✓ Closing observed
08-10 00:48	80m	- / -	OK1SI	+16 / -	2	Partial capture
08-10 00:46	80m	-24 / -	KP2B	- / -16	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
011830 -24 1423  CE8EIO W4QJ FM05
005545 -17 1301  PI4DX W4QJ FM05 (x3)
005745 -13 1301  DR800WE W4QJ FM05 (x2)
010000 -12 1703  W4QJ EA7AH IM67 (x4)
010015 +14  565  W4QJ ON6AA -17 (x3)
002000 -22 1625  HK3X W4QJ FM05 (x2)

40m

UTC    dB Audio  Message
224000 -21 1269  W4QJ SP8ONV KO10

20m

UTC    dB Audio  Message
230800 -10  518  W4QJ TN8GD RR73
223230  -8 1357  W4QJ PA1AA JO21 (x2)
223315  -8  957  PA1AA W4QJ -02
223330 -19 1357  W4QJ PA1AA R-08 (x2)
223400 -11  957  W4QJ DC5RE JO31 (x3)
223630 -12 1389  W4QJ YL3NF KO17
223645  -8  957  OK8DJ W4QJ -14 (x5)

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.

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