Cookies help us deliver our services.

We may use session cookies for technical purposes such as to enable better navigation through
the site, or to allow you to customize your preferences for interacting with the site.

By using our services, you agree to our use of cookies. OK
home QRZCQ - The database for radio hams 
 
2021-07-30 05:12:19 UTC
 

Call:

   Advanced
 

Call:

  

Pass:

  
 

or

 
OM4YJ

Active QRZCQ.com user


activity index: 3 of 5

Jaroslav Judiny
Dolný Šianec 20B
91101 Trenčín
Slovak Republic

EU
slovak republic
image of om4yj

Call data

Last update:2021-07-18 06:55:11
QTH:Dubodiel - second Remote QTH
Continent:EU
Views:708
Main prefix:OM
Class:EXTRA
Latitude:48.7626433
Longitude:18.1007859
Locator:JN98BS
DXCC Zone:504
ITU Zone:28
CQ Zone:15

Most used bands

17m
(31%)
20m
(29%)
40m
(14%)
30m
(14%)
15m
(8%)

Most used modes

FT8
(89%)
MFSK
(12%)
JT65
(1%)
RTTY
(1%)
JT9
(1%)

QSL data

Last update:2020-05-07 20:26:19
eQSL QSL:no
Bureau QSL:no
Direct QSL:YES
LoTW QSL:no

Biography

Licenced since 1984.
Looking mostly for DX-DIGI mode (QTH Dubodiel): FT8, FT4, MFSK and FM mode (QTH Trenčín): 145.500 Mhz and 433.500 Mhz.

I am member of the FT8 Digital Mode Club >13373<
https://www.ft8dmc.eu/

Wiev my Awards:
https://drive.google.com/drive/folders/19wP1MydclsccGJmIIY9E5uy3MML-g47I?usp=sharing
number of awards: 67


My hamshack:
https://youtu.be/MaF914tLM9k

Worked DXCCs:

Equipment

TCVR: Kenwood TS-50
TCVR: Yaesu FT-7900
SDR RX: RSP1A, https://www.sdrplay.com/rsp1a/ + Raspberry Pi 4 Model B

Low Costs:
Web Server Remote SDR: ORANGE Pi Zero 2 (1GB)
Debian Image: http://www.orangepi.org/downloadresources/
Setup: https://f1atb.fr/index.php/2021/05/06/orange-pi-zero-2-setup/
SDR RX: MK4, design CT1FFU, 100 kHz - 2 GHz, https://www.dxpatrol.pt/index.php/products
HF Direct Sampling Mode REALTEK RTL2832U + UHF Tuner Rafael Micro R820T 24 - 1766 MHz
REALTEK RTL2832U is RTL2838 as product name, Output only 8-bit I/Q-samples
https://www.rtl-sdr.com/rtl-sdr-quick-start-guide/
Software: SDRSharp, https://airspy.com/download for Windows 10

SWR and POWER METER, D ORIGINAL ANTENNA: DX-CN600, CROSS NEEDLE,
range: 30W/300W/600W/3kW PEP or AVG, 1.8 Mhz - 520 Mhz

Linear Silent Power Supply 230 V / 13.8 V / 30 A DC SELV: HOME MADE
basic components:
SEDLBAUER toroidal transformers 500 VA, 230 V / 18 V AC,
http://www.sedlbauer.de/media/ringkerntrafo_datenblatt_826058_e.pdf
IXYS Power MOSFET IXFN 140N20P transistor,
https://www.alldatasheet.com/datasheet-pdf/pdf/414151/IXYS/IXFN140N20P.html
IC Programmable Precision References TL431,
https://www.alldatasheet.com/datasheet-pdf/pdf/349571/TI/TL431.html
Linear Current Sensor IC: ACS756,
https://pdf1.alldatasheet.com/datasheet-pdf/view/480255/ALLEGRO/ACS756.html
https://drive.wy.sk/index.php/s/pksTmkxjIlQcOPy#pdfviewer


REMOTE QTH:
Damocles2 1208,https://www.hw-group.com/device/damocles2-1208
RealVNC, https://www.realvnc.com/en/connect/


digital mode USB interface: microHAM DIGI KEYER II,
https://www.microham.com/contents/en-us/d164_DKII.html

Antenna Analyzer RigExpert AA-55 ZOOM.BT: 0,06 Mhz to 55 Mhz
https://rigexpert.com/products/antenna-analyzers/aa-55-zoom-option-bluetooth/


My Antennas Made of Wires and Kevlar rope:

HEXBEAM, @15m, 6-band: 20m-6m, http://sp7idx-hexbeam.eu/

GP 10m, @2m, 2-band: 40m, 30m

Double Extended Zepp Colinear @15m
band: 30m, preferred DX Areas: Slovak Republic to Australia and Japan


My desktop computers:

PC LENOVO
PC NUC7CJYH Intel Celeron, RAM 2x8GB, 2 x HDMI, Low Costs
operating system:
Linux Mint MATE 64 bit - https://www.linuxmint.com/download.php
Linux Ubuntu Desktop - https://ubuntu.com/download/desktop
Windows 10 Home

°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°
DIGI MODE - FT8, FT4, fldigi, .....:
Raspberry Pi 4 Model B, RAM 4 GB, operating system Raspbian Buster https://www.raspberrypi.org/downloads/raspbian/
USB Sound Card: ADA-17, https://www.axagon.eu/en/produkty/ada-17
USB - Serial Adapter RS-232: ADS-1PS, https://www.axagon.eu/en/produkty/ads-1ps
DIGI INTERFACE: Audio, PTT, CW, schematic.pdf:
https://github.com/yu7aop/DIGI-interface-for-Ham-radio
°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°

Computer Software:
MMANA-GAL basic, Antenna-Analyzing Tool, http://gal-ana.de/promm/index.htm
SimSmith, RF Circuit Analysis, http://www.ae6ty.com/Smith_Charts.html
Transmission Line Details, https://ac6la.com/tldetails1.html

DIGI FT8, FT4 AWARDS: software UltimateAAC, https://www.ft8dmc.eu/?page_id=1048

°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°
Digi Modes FT8, FT4: https://physics.princeton.edu/pulsar/K1JT/wsjtx.html
PSK Reporter Statistics: https://pskreporter.info/pskmap.html

Digi Mode FREEDV digital voice: https://freedv.org/
HF bands: 3.625 Mhz, 3.643 Mhz, 3.693 Mhz, 3.697 Mhz, 7.177 Mhz, 14.236 Mhz
°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°

Schematic Design Software:
https://www.digikey.com/en/resources/design-tools/schemeit
https://kicad-pcb.org/


HF Propagation Prediction:
https://soundbytes.asia/proppy/
https://www.voacap.com/hf/

Other images

second pic
OM4YJ / QSL
  

Site Rev. 18873