YO5QDN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Romania Most frequent locator attributed to this token: KN17

Receiver-side FT8 activity involving YO5QDN, decoded by SO8OO in southeastern Poland. 410 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 39 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-14.

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 410 FT8 messages attributed to YO5QDN as the transmitting token by decoded message structure across 39 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (47%), followed by 40 m (30%) and 20 m (22%). Most decodes (57%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (80%); the estimated median was +1 dB.

Overview

410

Messages attributed

UTC dates decoded

Active 15-min windows

+1 dB

Estimated median S/N

Bands

80m · 192 60m · 1 40m · 125 20m · 90 10m · 2

First attributed message: 2026-06-08
Last attributed message: 2026-09-14 06:44 UTC

Observed FT8 message patterns

Attributed sample: 410 messages
Active dates: 39 UTC dates
Estimated median S/N: +1 dB
Estimated 10th-90th percentile: -13 to +13 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 26, moderate (-15 to -9 dB) 54, strong (≥ -8 dB) 330.

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 YO5QDN in decoded directed-looking exchanges:

PI4DX · Netherlands ×2 IQ4JO · Italy ×2 R3HH · European Russia RC5F · European Russia RN6MA · European Russia 4X1UF · Israel E70A · Bosnia-Herzegovina E74K · Bosnia-Herzegovina EB5DFU · Spain JA0LFV · Japan JA4LXY · Japan JA6VQA · Japan

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 YO5QDN

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: KN17 · 340 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 285 km (approx.)
Last such locator decoded: 2026-09-14 06:44 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	YO5QDN S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-14 21:26	40m	- / -	OZ1LGJ	+13 / -	3	Partial capture
09-14 21:25	40m	- / +7	II6IGTO	-4 / -	2	Partial capture
09-14 21:23	40m	- / -2	SV1EKI	-11 / -	5	Partial capture
09-14 21:23	40m	- / -	HB9ZHK	-17 / -	2	Partial capture
09-14 06:44	40m	-3 / -	PD7RF	- / -	2	Partial capture
09-13 21:09	40m	- / -6	SV9QWC	-12 / -	2	✓ Closing fragment
09-13 18:11	40m	-4 / -	W6S	- / -	4	Partial capture
09-13 18:05	40m	-1 / -	IQ7AAV/P	- / -	6	Partial capture
09-13 06:00	80m	- / -	SP6FME	+22 / -	2	Partial capture
09-13 05:15	80m	- / -	SP6FME	+23 / -	3	Partial capture
09-13 04:31	80m	+2 / -	VP2MAA	- / -	3	Partial capture
09-09 21:06	80m	- / -4	YO9HP	+4 / -	2	✓ Closing fragment
09-09 21:04	80m	- / -9	RA2FKD	0 / -	2	Partial capture
09-09 21:01	80m	- / -	RA2FKD	+8 / -	2	Partial capture
09-09 20:55	40m	- / -	RC9WC	-16 / -	2	✓ Closing fragment
09-09 06:20	40m	- / -	Z68PX	-4 / -	2	✓ Closing fragment
09-08 18:29	40m	- / -5	HB9EFK	+2 / -	2	✓ Closing fragment
09-08 18:00	80m	0 / -1	YO9XC	+12 / +2	4	✓ Full exchange observed
09-08 17:58	80m	+2 / -	<...>	- / -	4	Partial capture
09-06 04:21	80m	+16 / -9	IZ8WGR	+1 / -15	8	✓ Full exchange observed
09-06 04:19	80m	- / -17	3Z100LKK	+4 / -	2	Partial capture
09-06 04:19	80m	+12 / -	OZ7SKB/A	- / -15	3	Partial capture
09-01 06:20	40m	- / -24	G5GDX	-16 / -	2	Partial capture
09-01 05:55	80m	+12 / -	R1QD	- / -	4	Partial capture
08-31 19:49	80m	+12 / -	IT9KSS	- / -	2	Partial capture
08-31 02:41	40m	- / -	G1CEC	-6 / -	4	Partial capture
08-31 02:23	40m	- / -15	N3IQ	-4 / -	2	✓ Closing fragment
08-31 02:13	80m	+17 / -	SV9QWC	- / -	8	Partial capture
08-31 02:04	80m	+21 / -2	SM7TZK	+7 / -10	6	✓ Full exchange observed
08-30 18:44	40m	-3 / -	3A2MW	- / -	3	Partial capture
08-30 18:02	80m	+9 / -	UR9QQ	- / -12	3	Partial capture
08-30 18:01	80m	-1 / -10	SP7OK	+5 / -23	3	✓ Full exchange observed
08-30 08:03	80m	-5 / -	DB2VS	- / -	5	Partial capture
08-30 07:54	80m	-2 / -	JY5IB	- / -	11	Partial capture
08-30 07:49	20m	-10 / 0	ON3BEN	+12 / -3	4	✓ Full exchange observed
08-30 07:44	20m	- / 0	PD7RF	+10 / -	2	✓ Closing fragment
08-29 23:46	80m	- / -	DH3MFW	-3 / -	2	Partial capture
08-29 23:40	80m	+11 / -	RD9U	- / -	12	Partial capture
08-29 23:33	80m	+11 / -	<...>	- / -21	2	Partial capture
08-29 23:17	80m	+8 / -	LA1SDX	- / -	2	Partial capture
08-29 23:13	80m	-9 / -6	<...>	-9 / -12	4	Partial capture
08-29 23:09	80m	+3 / -	DO5HOK	- / -16	3	Partial capture
08-29 23:07	80m	0 / -	IZ5IMD	- / -	3	Partial capture
08-29 22:55	40m	- / -11	HI8ML	0 / -	2	Partial capture
08-29 22:50	40m	- / -	G1CEC	-7 / -	5	Partial capture
08-29 21:46	80m	+8 / 0	LZ2VQ	+5 / -12	2	Partial capture
08-29 21:43	80m	+7 / 0	DL1EDR	+9 / -17	5	Partial capture
08-29 21:42	80m	+6 / -9	IQ4JO	+4 / -10	3	Partial capture
08-29 21:34	80m	+3 / -10	UA2KU	+12 / -11	5	✓ Full exchange observed
08-29 20:00	80m	+6 / -	JA4FKX	- / -	16	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
212100  -5 2114  YO5QDN II9IAGM +08
064415  -4 2839  PD7RF YO5QDN KN17 (x2)
212315 -19  903  YO5QDN HB9ZHK JN47
212345 -12 2549  YO5QDN SV1EKI KM18
212415 -15  903  YO5QDN HB9ZHK JN47
212515  -9 2549  YO5QDN SV1EKI R-02
212515  -4 1624  <YO5QDN> II6IGTO
212545  -9 2549  YO5QDN SV1EKI R-02 (x2)
212615  -3 1624  YO5QDN II6IGTO R+07
212645 -14 2549  YO5QDN SV1EKI R-02
212645 +17 2833  YO5QDN OZ1LGJ R+13 (x3)

80m

UTC    dB Audio  Message
043115 +10 2801  VP2MAA YO5QDN KN17 (x3)
043415  -9 2801  CQ YO5QDN KN17 (x3)
051530 +21 2800  YO5QDN SP6FME JO90
051530  -6 1651  YO5QDN OM3ZAS +02
051600 +23 2800  YO5QDN SP6FME JO90 (x2)
055945 +16 2799  CQ YO5QDN KN17
060000 +24 2800  YO5QDN SP6FME JO90
060015 +19 2799  CQ YO5QDN KN17
060030 +21 2800  YO5QDN SP6FME JO90
182015  +6 2799  YT2FA YO5QDN KN17

20m

UTC    dB Audio  Message
183245  +1  761  YO5QDN PC9F R+04 (x2)
143045 -12 3105  YO5QDN VU2FR ML88
180300 -10 2666  YO5QDN ZS6HON -17 (x2)
180800  +2 2472  YO5QDN DK1AJ JO42 (x4)
074430 +13 2578  YO5QDN PD7RF +00 (x2)
074900 -11 1446  ON3BEN YO5QDN KN17
074915 +12 1870  YO5QDN ON3BEN +00
075000  -9 1446  ON3BEN YO5QDN R-03
075015 +13 1870  YO5QDN ON3BEN RR73

60m

UTC    dB Audio  Message
181645  -5 1408  CQ YO5QDN KN17                        a1
181700  -6 1066  YO5QDN SP3CUG JO82
181700  -4  534  YO5QDN IW2CAK JN45
181730  -4 1066  YO5QDN SP3CUG JO82 (x7)

10m

UTC    dB Audio  Message
182100 -19 1195  YO5QDN OE9RWH JN57
175330 -24 1589  YO5QDN PD0CIF JO32
063730  +1 2771  YO5QDN R3HH +17 (x2)
080630 -19 1815  OM3PC YO5QDN R-09
084400 -14 2003  YO5QDN DM5EI JO43 (x2)
144200 -10  679  YO5QDN A71AT -13
185145 -13 2076  YO5QDN RN6MA +02 (x2)
190015 -15 2291  YO5QDN CE2SV -17 (x3)
143745  +2 1038  YO5QDN UR1CCT R+16 (x2)

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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