YO7ARZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Romania Most frequent locator attributed to this token: KN14

Receiver-side FT8 activity involving YO7ARZ, decoded by SO8OO in southeastern Poland. 972 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 56 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-10-03.

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 972 FT8 messages attributed to YO7ARZ as the transmitting token by decoded message structure across 56 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (68%), followed by 20 m (26%) and 10 m (6%). The busiest six-hour window was 13:00-19:00 UTC, containing 48% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

972

Messages attributed

UTC dates decoded

151

Active 15-min windows

-7 dB

Estimated median S/N

Bands

40m · 658 20m · 253 10m · 61

First attributed message: 2026-06-08
Last attributed message: 2026-10-03 16:33 UTC

Observed FT8 message patterns

Attributed sample: 972 messages
Active dates: 56 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -17.1 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 152, moderate (-15 to -9 dB) 277, strong (≥ -8 dB) 543.

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 YO7ARZ in decoded directed-looking exchanges:

UN0GY · Kazakhstan ×2 TF4M · Iceland ×2 SM7TZK · Sweden ×2 SQ9DJQ · Poland ×2 DN9AD · Fed. Rep. of Germany PY5GA · Brazil EA5XA · Spain HI8J · Dominican Republic K8ET · United States N2BJ · United States VE6CQ · Canada WI1U · United States

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 YO7ARZ

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: KN14 · 713 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 611 km (approx.)
Last such locator decoded: 2026-10-03 16:33 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	YO7ARZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-03 16:33	40m	-7 / -	E70SZ	- / -	2	Partial capture
10-03 04:12	40m	-7 / -	N0YO	- / -	7	Partial capture
10-03 04:10	40m	-14 / -	TA3XEE	- / -1	2	✓ Closing fragment
10-03 04:09	40m	-3 / -	YV5KG	- / -	3	Partial capture
09-28 17:23	40m	-2 / -9	II4PAGE	-11 / +3	3	Partial capture
09-26 18:47	40m	-16 / -	JL1WQC	- / -	2	Partial capture
09-26 18:25	40m	- / -12	EX7DY	-20 / -	2	✓ Closing fragment
09-25 17:14	40m	-20 / -12	ER3PM	-4 / -	4	✓ Closing observed
09-25 17:09	40m	-5 / -	YC2BUZ	- / -	3	Partial capture
09-25 11:57	40m	- / +1	9A1CCB	0 / -	2	✓ Closing fragment
09-23 17:22	40m	-4 / -	HA5LB	- / +4	3	Partial capture
09-23 17:20	40m	-6 / -	HF26WBC	- / -	3	Partial capture
09-23 17:17	40m	-5 / -	SV8NAJ	-8 / -	3	✓ Closing observed
09-23 12:38	10m	- / -10	CN8WK	+8 / -	2	Partial capture
09-17 17:44	40m	-2 / -13	RC5F	-2 / -12	6	✓ Full exchange observed
09-17 17:41	40m	-8 / -	J48S	- / +9	7	✓ Closing fragment
09-15 13:41	40m	-5 / -3	HF100PKP	-5 / 0	4	Partial capture
09-15 03:39	40m	- / -13	SM7TZK	-18 / -	3	✓ Closing fragment
09-15 01:03	40m	- / -4	VO1AW	-16 / -	2	✓ Closing fragment
09-12 04:03	40m	- / -13	J38LD	-8 / -	2	✓ Closing fragment
09-11 17:24	40m	-3 / -	RA0LQ	- / -1	3	✓ Closing fragment
09-11 17:23	40m	-5 / -	TA1/TF1OL	- / -	2	Partial capture
09-11 17:22	40m	-4 / -	SY1BKQ	- / -	2	Partial capture
09-09 03:48	40m	- / -9	NF9V	-10 / -	2	✓ Closing fragment
09-09 03:27	40m	- / +4	KE4EB	-5 / -	4	Partial capture
09-08 04:04	40m	- / -11	YU65AEC	-6 / -	2	Partial capture
09-08 03:48	40m	-10 / -	CE8EIO	- / -	4	Partial capture
09-03 01:32	40m	+2 / -	PW8BR	- / -14	8	✓ Closing fragment
09-03 01:29	40m	-8 / -	CX1TF	- / -	4	Partial capture
09-03 01:22	40m	-3 / -	TL8GD	- / -18	2	Partial capture
09-03 01:20	40m	-12 / -	LZ936BA	- / -2	2	Partial capture
09-03 01:19	40m	-5 / -	IR7MGGC	- / -	2	Partial capture
09-03 01:18	40m	-10 / -	KN4ZUJ	- / -	2	Partial capture
09-03 01:15	40m	+1 / -	TL8GD	- / -	4	Partial capture
09-03 01:12	40m	-8 / -	AA1GM	- / -11	3	✓ Closing fragment
09-03 01:11	40m	-11 / -	BG0FQU	- / -	2	Partial capture
09-03 01:08	40m	+3 / -	HK0RMR	- / -	5	Partial capture
09-03 01:07	40m	-10 / -	IR7MGGC	- / -	2	Partial capture
09-02 00:08	40m	-7 / -8	D44TWO	-10 / -	2	✓ Closing observed
09-01 17:07	40m	+8 / -	YC2BUZ	- / -	2	Partial capture
09-01 13:44	40m	-3 / -	9A1KO	- / -	2	Partial capture
09-01 13:41	40m	-2 / -	IK0XBU/P	- / -2	5	✓ Closing fragment
09-01 13:39	40m	+5 / -10	SQ9DJQ	+8 / +7	5	✓ Full exchange observed
09-01 13:34	40m	-3 / +3	SP9WTC	-11 / -	6	✓ Full exchange observed
09-01 13:31	40m	-4 / -	SQ100PKP	- / -	5	Partial capture
09-01 13:29	40m	+5 / -4	DF0AWG	-4 / -13	7	✓ Full exchange observed
09-01 13:24	40m	-6 / -1	SO8DAN	-5 / +7	7	✓ Full exchange observed
09-01 13:22	40m	-2 / -	SV1TRJ	- / -	4	Partial capture
09-01 13:19	40m	-10 / -	SQ100PKP	- / -	6	Partial capture
09-01 13:17	40m	-10 / -2	OE4LQK	-2 / -	3	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
033000 -16 1180  HK3W YO7ARZ KN14
040900  +0 2331  YV5KG YO7ARZ KN14 (x3)
041030 -13 2022  TA3XEE YO7ARZ -01 (x2)
041215  -9 1303  N0YO YO7ARZ KN14 (x7)
163300  -5 1788  E70SZ YO7ARZ KN14 (x2)

10m

UTC    dB Audio  Message
172800  -6 1097  PY4ZDC YO7ARZ KN14 (x3)
173000  -9  778  SV7BAY YO7ARZ KN14 (x3)
134845  -7 2545  5A1AL YO7ARZ KN14 (x2)
135145 -17 1095  YB1KXV YO7ARZ KN14 (x3)
135445 -13  963  TA8AT YO7ARZ KN14 (x2)
123815  +8 2556  YO7ARZ CN8WK -10 (x2)

20m

UTC    dB Audio  Message
025515  +3 2462  HI8J YO7ARZ R+08
025530  -5 2463  YO7ARZ HI8J -08
025545  +4 2462  HI8J YO7ARZ R+09
025600  -6 2463  YO7ARZ HI8J RR73
025615  +4 2462  HI8J YO7ARZ 73
025645  -2 2133  D2IM YO7ARZ KN14 (x4)
030045  -7 2269  KE8BBC YO7ARZ KN14
030145  -2 2133  D2IM YO7ARZ KN14
030215  -4 1199  N8TUP YO7ARZ KN14
030315  +0 2133  D2IM YO7ARZ KN14 (x2)
021830  -9 1979  YO7ARZ 9K2RT RRR

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.

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