9A170TESLA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Croatia

Receiver-side FT8 activity involving 9A170TESLA, decoded by SO8OO in southeastern Poland. 761 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 24 UTC dates in the available aggregate history. Observed between 2026-07-19 and 2026-09-26.

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 761 FT8 messages attributed to 9A170TESLA as the transmitting token by decoded message structure across 24 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%), followed by 80 m (0%) and 20 m (0%). Most decodes (97%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

761

Messages attributed

UTC dates decoded

136

Active 15-min windows

-16 dB

Estimated median S/N

Bands

80m · 2 40m · 758 20m · 1

First attributed message: 2026-07-19
Last attributed message: 2026-09-26 14:46 UTC

Observed FT8 message patterns

Attributed sample: 761 messages
Active dates: 24 UTC dates
Estimated median S/N: -16 dB
Estimated 10th-90th percentile: -21 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 385, moderate (-15 to -9 dB) 237, strong (≥ -8 dB) 139.

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 9A170TESLA in decoded directed-looking exchanges:

EO100W · Ukraine ×2 8B81JB · Indonesia BD4VNB · China DG4LXM · Fed. Rep. of Germany E7POTA · Bosnia-Herzegovina HA5WZ · Hungary IZ0NPM · Italy OE6GBG · Austria PA1UN · Netherlands R3PAA · European Russia SP3IOE · Poland SP5MXW/P · Poland

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.

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	9A170TESLA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-27 10:03	40m	- / +6	SP8MTA	-10 / -	2	Partial capture
09-27 09:21	40m	- / -17	US5NAR	-20 / -	2	Partial capture
09-26 20:23	40m	- / -11	SM2OTU	-10 / -	2	Partial capture
09-26 18:56	40m	- / -	F4IIX	-11 / -	2	Partial capture
09-26 14:50	40m	- / -	DH7VK	-4 / -	3	Partial capture
09-26 14:46	40m	-11 / -	<...>	-13 / -	2	✓ Closing fragment
09-26 14:33	40m	- / -	DL1KYF	0 / -	2	Partial capture
09-26 14:31	40m	- / -	<...>	-7 / -	3	✓ Closing fragment
09-26 14:29	40m	- / -	LY3QR	-14 / -	3	Partial capture
09-26 14:17	40m	- / -	OK1VCB	0 / -	2	Partial capture
09-26 14:15	40m	-17 / -	<...>	-5 / -	2	✓ Closing fragment
09-26 13:47	40m	- / -13	SP7VCL	-4 / -	3	Partial capture
09-26 13:34	40m	- / +7	S57CT	-6 / -	2	Partial capture
09-26 13:30	40m	- / -	SP2NBH	-18 / -	2	Partial capture
09-26 13:16	40m	- / -18	DD9PN	-19 / -	3	Partial capture
09-26 08:58	40m	- / -	DL6UM	-14 / -	5	Partial capture
09-25 23:57	40m	- / -6	G5LSB	-14 / -	2	Partial capture
09-25 21:17	40m	- / -11	HB9JOE	+4 / -	3	Partial capture
09-25 20:50	40m	- / -	CT7AUT	-18 / -	2	Partial capture
09-25 17:30	40m	- / -	<...>	-2 / -	3	✓ Closing fragment
09-25 17:30	40m	- / +3	IQ6MC	+3 / -	3	Partial capture
09-25 17:19	40m	- / -	UR5EDX	+2 / -	2	Partial capture
09-25 17:17	40m	-12 / -	<...>	0 / -	5	✓ Closing fragment
09-25 17:11	40m	-12 / -3	YO6GLT	-17 / -6	2	Partial capture
09-25 17:10	40m	-12 / -	<...>	-8 / -	7	✓ Closing fragment
09-25 17:05	40m	-13 / -	DL8YBL	- / -14	3	Partial capture
09-25 16:56	40m	-10 / -	<...>	-13 / -	2	✓ Closing fragment
09-25 16:56	40m	- / -	LZ2BC	-18 / -	2	Partial capture
09-25 16:55	40m	-9 / +8	YT3MD	-13 / 0	3	Partial capture
09-25 16:48	40m	-13 / -	SP3GHC	-6 / -6	3	Partial capture
09-25 16:46	40m	-15 / -	<...>	-9 / -	9	✓ Closing fragment
09-25 16:33	40m	- / -	<...>	-14 / -	2	✓ Closing fragment
09-25 16:30	40m	-16 / -	R3OR	- / +4	3	Partial capture
09-25 16:22	40m	- / -	<...>	-5 / -	3	✓ Closing fragment
09-25 16:22	40m	- / -9	F1PBZ	-6 / -	2	Partial capture
09-25 16:18	40m	- / -1	IK2EBP	-16 / -	2	Partial capture
09-25 16:10	40m	- / -	OM3CND	+12 / -	2	Partial capture
09-25 16:09	40m	-16 / -	<...>	-3 / -	7	✓ Closing fragment
09-25 01:23	40m	- / -5	R4WQ	-15 / -	2	Partial capture
09-24 18:19	40m	-14 / -	<...>	-8 / -	2	✓ Closing fragment
09-24 17:29	40m	- / -10	RW3QW	-10 / -	2	Partial capture
09-24 17:02	40m	- / -	<...>	-10 / -	2	✓ Closing fragment
09-24 17:01	40m	- / -9	OK8UQ	-5 / -	3	Partial capture
09-24 16:59	40m	- / -7	DF6TG	-17 / -	2	Partial capture
09-24 16:38	40m	-18 / -	<...>	- / -	2	✓ Closing fragment
09-24 16:37	40m	-14 / -	DL7VTE	- / -15	2	Partial capture
09-24 16:34	40m	- / -16	SQ4PKO	-18 / -	3	Partial capture
09-24 16:33	40m	- / -	OH3MB	-8 / -	2	Partial capture
09-24 01:34	40m	- / -	MI7XHT	-16 / -	2	Partial capture
09-23 17:45	40m	- / -	HB9ELE	-5 / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
143845 -21 1201  9A170TESLA <...> 73
144600 -11 1228  <...> 9A170TESLA RR73
144615 -13 2152  9A170TESLA <...> 73
145015  -4 2152  9A170TESLA DH7VK JO62 (x3)
145145  +4 2214  9A170TESLA <...> RR73
185615  -9  279  9A170TESLA F4IIX IN95 (x2)
202300 -10 2630  9A170TESLA SM2OTU -11 (x2)
092145 -18 1445  9A170TESLA US5NAR R-17 (x2)
100345 -11 1445  9A170TESLA SP8MTA JO91 (x2)

20m

UTC    dB Audio  Message
105730 -14 1047  9A170TESLA <...> RR73 (x4)
110430  -9 1046  9A170TESLA F1PPH JN07
110600  +6 1046  9A170TESLA PD3LKN JO22 (x3)
110730  +8 1045  9A170TESLA PD1HPB JO22 (x6)
111030  +0 1045  9A170TESLA <...> RR73

80m

UTC    dB Audio  Message
051430 -17 1209  <...> 9A170TESLA (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.

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