IU7TZH — 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: Italy

Receiver-side FT8 activity involving IU7TZH, decoded by SO8OO in southeastern Poland. 19 FT8 messages attributed to this token as transmitter, on 80m, 60m, 20m, 10m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-14 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 19 FT8 messages attributed to IU7TZH as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (32%), followed by 20 m (32%) and 10 m (21%). In this small sample, the estimated median decoder S/N was -12 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 6 60m · 3 20m · 6 10m · 4

First attributed message: 2026-06-14
Last attributed message: 2026-10-23 16:55 UTC

Observed FT8 message patterns

Attributed sample: 19 messages
Active dates: 6 UTC dates
Estimated median S/N: -12 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 7.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with IU7TZH in decoded directed-looking exchanges:

EW1D · Belarus UR1CCT · Ukraine S53K · Slovenia M8KKH · England UX0KR · Ukraine OM5ALL · Slovak Republic YU5DR · Serbia HB9DBM · Switzerland IU0KNS · Italy E70SZ · Bosnia-Herzegovina OM3PC · Slovak Republic

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	IU7TZH S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-23 16:54	80m	-3 / +8	E70SZ	+12 / -14	5	✓ Full exchange observed
10-23 16:52	60m	- / -5	DK7ZT	-7 / -	3	Partial capture
10-23 16:50	60m	-16 / -	IU0KNS	-4 / -15	7	✓ Full exchange observed
10-23 16:49	60m	- / -	PE1NPS	-10 / -	3	Partial capture
10-23 16:49	60m	-16 / -11	HB9DBM	-8 / -	3	✓ Closing observed
10-16 16:20	160m	- / -9	S53K	-18 / -	2	✓ Closing fragment
10-11 16:49	80m	-8 / -	DK9WI	- / -20	2	Partial capture
10-11 16:43	40m	- / -	EA3HMM	-4 / -	2	Partial capture
10-10 08:22	40m	- / -	SP9JP	-7 / -	2	Partial capture
10-04 07:34	40m	- / -5	YU2MS	-15 / -	3	Partial capture
09-26 08:02	40m	- / -2	DK7ZT	-18 / -	4	Partial capture
09-26 08:01	40m	- / -7	OM5ALL	-14 / -	2	✓ Closing fragment
08-30 07:50	10m	-17 / -	UR1CCT	- / -21	2	✓ Closing fragment
08-30 07:45	10m	-22 / -	EW1D	- / -10	2	✓ Closing fragment
08-29 09:38	20m	-20 / -	UX0KR	- / -	2	✓ Closing fragment
08-28 15:00	20m	- / +6	M8KKH	+13 / -	5	✓ Closing fragment
08-08 09:10	10m	- / 0	R6OP	-19 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
164915  -8 2503  DK9WI IU7TZH -20 (x2)
165500  -5 2303  OM3PC IU7TZH RR73
165430  -6  603  E70SZ IU7TZH -14 (x2)
165515  +9  426  IU7TZH E70SZ R+08
165530  -2  603  E70SZ IU7TZH RR73
165545 +14  426  IU7TZH E70SZ 73

60m

UTC    dB Audio  Message
164915 -16 1634  HB9DBM IU7TZH RR73
164930 -10 2433  IU7TZH PE1NPS JO22
164930  -4 1629  IU7TZH HB9DBM 73
165000  -8 2434  IU7TZH PE1NPS JO22 (x2)
165030  -5 1092  IU7TZH IU0KNS JN62 (x3)
165145 -15 1634  IU0KNS IU7TZH -15
165200  -3 1092  IU7TZH IU0KNS R+12
165215 -17 1634  IU0KNS IU7TZH RR73
165230  -4 1092  IU7TZH IU0KNS 73
165230 -10 2483  IU7TZH DK7ZT -05 (x3)

160m

UTC    dB Audio  Message
162030 -18 1699  IU7TZH S53K R-09 (x2)

40m

UTC    dB Audio  Message
080215  -9 1465  IU7TZH OM5ALL 73
080215 -16 1907  IU7TZH DK7ZT -02 (x4)
073445 -18 1955  IU7TZH YU2MS R-05 (x3)
080430  +6  533  IU7TZH OK1ZJK R-13
082215  -6  841  IU7TZH SP9JP JO90 (x2)
164200  -8 1702  IU7TZH YU5DR 73
164230  -6 1839  IU7TZH RK4FF -13
164300  -4  280  IU7TZH EA3HMM JN00 (x2)

10m

UTC    dB Audio  Message
091045 -21 1420  IU7TZH R6OP R+00 (x2)
074545 -23 1591  EW1D IU7TZH -10 (x2)
075030 -17 2391  UR1CCT IU7TZH -21 (x2)

20m

UTC    dB Audio  Message
150000 +13  460  IU7TZH M8KKH R+06 (x5)
093815 -24 2578  UX0KR IU7TZH RR73 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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