YO4FZV — 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: Romania Most frequent locator attributed to this token: KN44

Receiver-side FT8 activity involving YO4FZV, decoded by SO8OO in southeastern Poland. 2,472 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 76 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-11-06.

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 2,472 FT8 messages attributed to YO4FZV as the transmitting token by decoded message structure across 76 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (73%), followed by 20 m (17%) and 10 m (10%). The busiest six-hour window was 17:00-23:00 UTC, containing 46% of decodes. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (61%); the estimated median was -5.5 dB.

Overview

2,472
Messages attributed
76
UTC dates decoded
289
Active 15-min windows
-5.5 dB
Estimated median S/N

Bands

40m · 1,814 20m · 411 10m · 247
First attributed message: 2026-06-10
Last attributed message: 2026-11-06 20:20 UTC

Observed FT8 message patterns

Attributed sample
2,472 messages
Active dates
76 UTC dates
Estimated median S/N
-5.5 dB
Estimated 10th-90th percentile
-17 to +5 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 340, moderate (-15 to -9 dB) 621, strong (≥ -8 dB) 1,511.

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 YO4FZV in decoded directed-looking exchanges:

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 YO4FZV

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
KN44 · 1,708 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
813 km (approx.)
Last such locator decoded
2026-11-06 20:17 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 UTCBandYO4FZV S/NCounterpartCounterpart S/NMsgsCapture
11-06 20:22 40m - / -14 UA6YW 0 / - 4 ✓ Closing fragment
11-06 20:17 40m -20 / - EX8ABR - / -15 3 ✓ Closing fragment
11-06 20:13 40m -17 / - YB7AAE - / -22 5 ✓ Closing fragment
11-06 05:59 40m +2 / - IW2DNI - / - 43 Partial capture
11-06 05:57 40m +4 / - II1FAIR - / - 4 Partial capture
11-06 05:44 40m +1 / - XE2V - / -26 21 Partial capture
11-06 05:32 40m 0 / - XE2V - / -26 16 Partial capture
11-06 05:15 40m +3 / - XE2V - / -11 22 Partial capture
11-06 05:09 40m +5 / - HC2GRC - / -8 6 ✓ Closing fragment
11-03 19:11 40m -14 / - EY7BP - / -16 3 ✓ Closing fragment
11-03 06:19 40m -6 / - IK2TCV - / - 2 Partial capture
11-01 18:28 40m -5 / - OK1DXR - / -7 3 ✓ Closing fragment
11-01 18:02 40m -8 / -6 EA9AR -12 / -3 5 ✓ Full exchange observed
10-31 16:38 40m 0 / - 5R8IC - / -16 9 ✓ Closing fragment
10-31 08:58 40m 0 / - IU8STX - / - 3 Partial capture
10-31 08:53 40m -2 / - PF1B - / - 9 Partial capture
10-31 08:51 40m 0 / - F5OYA/P - / - 4 Partial capture
10-31 08:48 40m -6 / -8 DH1NGL +7 / - 4 ✓ Closing observed
10-31 08:46 40m -2 / - OH1LA - / -14 4 Partial capture
10-31 08:45 40m -4 / - DG4FFF -15 / -16 4 ✓ Closing observed
10-31 08:42 40m - / - DL1BBO -2 / - 2 Partial capture
10-31 08:42 40m -6 / -4 YO5CN -4 / -4 6 ✓ Full exchange observed
10-31 08:39 40m -3 / -1 S55OO -2 / +2 9 ✓ Full exchange observed
10-31 08:37 40m -1 / - SQ8AA - / -7 3 ✓ Closing fragment
10-30 19:59 40m +1 / - OZ7DR - / - 8 Partial capture
10-30 19:56 40m +1 / - BG2DIH - / -17 3 ✓ Closing fragment
10-30 19:53 40m -8 / - JH6MNB - / -14 2 ✓ Closing fragment
10-30 19:50 40m 0 / - ON3CH - / - 5 Partial capture
10-30 19:47 40m +4 / - ON3CH - / - 2 Partial capture
10-30 19:44 40m +2 / - UN7PPV - / - 2 Partial capture
10-30 19:41 40m 0 / - A92AE - / -9 3 ✓ Closing fragment
10-30 19:23 40m +1 / - 9X5KM - / -14 9 ✓ Closing fragment
10-29 07:56 40m 0 / - 5B4AMX - / +1 3 ✓ Closing fragment
10-29 07:55 40m -4 / - IU5VMV - / -18 2 ✓ Closing fragment
10-28 18:43 40m -5 / - YL2TM - / -7 2 ✓ Closing fragment
10-28 18:35 40m -4 / - 7P8GE - / - 2 Partial capture
10-28 18:19 40m -13 / - 7P8GE - / -15 3 Partial capture
10-28 18:18 40m -12 / - FK8HA - / - 2 Partial capture
10-28 18:13 40m -8 / - FK8HA - / - 3 Partial capture
10-28 10:37 40m -8 / -25 F6ARS -5 / -10 15 ✓ Full exchange observed
10-28 10:27 40m -10 / - F6ARS - / - 6 Partial capture
10-28 09:20 40m -10 / -17 DB2VS -18 / -19 21 ✓ Full exchange observed
10-28 09:14 40m -10 / - LZ1ZF -12 / - 3 ✓ Closing observed
10-24 17:13 40m +6 / - BV2NF - / - 6 Partial capture
10-24 04:12 40m - / -1 4L1FL -16 / - 2 ✓ Closing fragment
10-24 04:05 40m - / -3 CT9/DF7EE +1 / - 4 Partial capture
10-24 03:32 40m - / -11 HI3K -6 / - 3 ✓ Closing fragment
10-23 08:48 40m -9 / -13 OK2CNI +3 / -13 13 ✓ Full exchange observed
10-23 08:43 40m -12 / - EA3HMM - / - 5 Partial capture
10-23 07:58 40m -9 / - TF5B - / -8 34 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
201415 -14 1950  YB7AAE YO4FZV KN44 (x4)
201645 -17 1950  DL6NA YO4FZV RR73
201745 -20 1950  EX8ABR YO4FZV KN44 (x3)
202045 -20 1950  DL3RAJ YO4FZV R-09
202230  +1  435  YO4FZV UA6YW LN04 (x3)
202330 -16 2546  YO4FZV IZ2ARA R-06
202400  -1  435  YO4FZV UA6YW 73
210430 -19 1542  YO4FZV CT7AXN -12
10m 
UTC    dB Audio  Message
080530  -7 2779  SV3AUW YO4FZV KN44 (x2)
083530 -20 1788  YO4FZV F5RRS R-19 (x2)
083900  -5 1998  YO4FZV IK2UCK JN45 (x3)
085745  -2 2240  YO4FZV ON5RZ JO21 (x4)
090445  -5 2643  YO4FZV F4IIJ -12 (x2)
091730 -14  976  YO4FZV IW4CYE -16
125600 -24 2171  YO4FZV IT9ZIR -01
20m 
UTC    dB Audio  Message
103045 +13  502  F4HSB YO4FZV -12
103130 -14 1746  YO4FZV F4HSB 73
103230  +6  502  OM7AMA YO4FZV KN44 (x8)
105200  -3  502  9A4AA YO4FZV KN44 (x2)
105245 -10  726  YO4FZV 9A4AA +06
105300  +0  502  9A4AA YO4FZV R-22 (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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