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2. June 2023
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preamplifier

An antenna preamplifier is usually used in particular. Its task is to amplify the weak signal received by the antenna to the level, which is better processed by the receiver. On higher VHF bands, it is an important part of the reception chain because it enables a low noise figure to be achieved, which would otherwise be aggravated by losses in the power cable between the antenna and the receiver.

OE3XTR anténa
VHF+SHF 

Lighthouse OE3XTR in Austria

15. July 202215. July 2022 om0aao 0 Comments antenna, preamplifier, vkv

For income testing, comparison of antennas, rotator setting, propagation conditions are detected - some signal source is suitable for this. VHF radio amateurs

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Vypracované odpovede pre rádioamatérske skúšky
Ham information Projects, Mods, Fixes and Add-on's 

Elaborated answers for radio amateur exams

4. July 202227. March 2023 om0aao 6 Comments antenna, antenna tuner, CB, CW, power amplifier, kv, preamplifier, receiver, SSB, TCVR, amplifier

When preparing for radio amateur exams, it is difficult for interested parties to obtain comprehensible documents, from which they would understand the issues of electrical engineering and radio engineering.

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Katedrála na ostrove Svätá Helena
VHF+SHF 

ZD7GWM / B beacon captured by F0FYF on 144 MHz for distance 7000 km!

6. March 2021 om0aao 0 Comments CW, preamplifier, vkv

Garry ZD7GWM recently launched a lighthouse on St. Helena Island 144,475 MHz with a power of 20W CW. OM0AAJ Jano

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Screenshot APRS programu UI-View
Software VHF+SHF 

How to get started with APRS via International Space Station (ISS)

7. August 202017. June 2022 admin 0 Comments preamplifier, satellite, vkv, yagi

While there is no APRS in OK (While there is no APRS in OK) While there is no APRS in OK, in OM, except for exceptions with this system

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LF+HF Projects, Mods, Fixes and Add-on's 

Low noise preamplifier OZ2OE 21 – 30 MHz

7. August 202024. June 2022 admin 0 Comments preamplifier

The author of the following connection is Ole OZ2OE. The original description in English can be found at http://hjem.get2net.dk/ole_nykjaer/oz2oe/hfpreamp/hfpreamp.html. we thank you! Preamplifier to “deaf” HF receiver. Suitable

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Projects, Mods, Fixes and Add-on's VHF+SHF 

Low noise preamplifier on 144 MHz OZ2OE

7. August 20201. September 2020 admin 0 Comments preamplifier, vkv

Another article from Ole OZ2OE is a low - noise preamplifier on 144 MHz s BF981, which makes a profit 23 dB at noise

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FO-29
Software VHF+SHF 

Satellite DX-ing on FO-29

7. August 202010. November 2020 admin 2 Comments DK7ZB, preamplifier, satellite, TCVR, vkv

The FO-29 is one of the satellites providing the greatest DX capabilities. The advantage is stable operation, good track height (polar, with perige between 800

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Predzosilňovač pre beverage anténu
LF+HF Projects, Mods, Fixes and Add-on's 

Preamplifier for beverage antenna

7. August 202024. June 2022 admin 1 Comment antenna, preamplifier

Beverage antenna as a special receiving antenna has the disadvantage of lower gain and thus subjectively attenuates the signals when switching

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Beverage antenna
LF+HF Projects, Mods, Fixes and Add-on's 

Beverage antenna

7. August 202017. June 2022 admin 0 Comments antenna, preamplifier

Beverage antenna is a special receiving antenna suitable especially for lower HF bands. In the CQ WPX Conteste, OM0A used a beverage

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Bloková schéma odrušenia
Ham information Projects, Mods, Fixes and Add-on's 

Interruption of DVB -T television reception

7. August 20203. March 2023 admin 0 Comments antenna, DK7ZB, preamplifier, TVI

Technical, legal and relational solutions to the TVI problem (Interference from television reception by amateur radio broadcasting) has been described many times in amateur radio in recent decades

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Schéma GaAs FET predzoslňovača
Projects, Mods, Fixes and Add-on's VHF+SHF 

Simple GaAs FET Preamplifier on 144 a 432 MHz

7. August 202024. June 2022 admin 0 Comments preamplifier, vkv

Today it is not a problem to get a solid GaAs transistor, nevertheless, the design of the preamplifier has two pitfalls - obtaining quality capacitance

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Selection of articles

  • Amateur radio cycling expedition OL5CXAmateur radio cycling expedition OL5CX
    In categories: DXbulletin, Ham information, LF+HF  6m, CW, SSB, vkv
    Dear friends, we would like to acquaint you with the details of our order in the fourth radio-cycling-expedition., consulted this year under the name „South Road“. ...read more
  • Helvetia Contest 2009Helvetia Contest 2009
    In categories: Contesting, Digital modes, LF+HF  contest, CW, RTTY, SSB
    Deadline: 25. – 26.april 2009 from 1300 UTC do 1300 UTC Connections are made to Switzerland stations only once ...read more
  • SLP result list 3/2009SLP result list 3/2009
    In categories: Contesting, LF+HF  contest, SWL
    SLP result list 3/2009, 28.-29.March 2009 Meno SWL ID Body 1 Vladimir Ignatov R3A-847 60282 2 Jozef Marcincak OM3-0001 18900 ...read more
  • CQ WPX RTTY Contest 2023CQ WPX RTTY Contest 2023
    In categories: Contesting, Digital modes, LF+HF  CQ WPX Contest, RTTY
    The CQ World-Wide WPX RTTY Contest will be held on February 11-12 2023 starting at 00.00 UT on Saturday and at the end of ...read more
  • Invitation to the IARU Region 1 VHF Contest 2007Invitation to the IARU Region 1 VHF Contest 2007
    In categories: Contesting, VHF+SHF  contest, vkv
    IARU Region I. VHF Contest – takes place on September 1-2 2007 from 14.00 do 14.00 OUT. They compete in categories 1. ...read more

OM HAM of the Year

Year 2004
Grad.. Ing. Jaroslav Just
OM3TA, SK


Year 2005
Rudolf Karaba
OM3PC


Year 2006
MUDr.Harry Činčura
OM3EA


Year 2007
Grad.. Ing. Radoslav Gališ
OM6KW


Year 2008
Ing. Jaroslav Kubicek
OM1II


Year 2009
Jozef Ivan
OM3NA (in rememberence)
a
Peter Martiška
OM3PA


Year 2010
Anton Srnka
OM1AEG


Year 2011
Dušan Pavlík
OM2ADP

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RSS Contest Calendar

  • Phone Weekly Test
    0230WITH-0300WITH, May 31
  • ICWC Medium Speed Test
    1900Z-2000Z, Jun 5
  • IARU Region 1 Field Day, CW
    1500WITH, Jun 3 to 1459Z, Jun 4
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    0000WITH-0100WITH, Jun 5
  • ICWC Medium Speed Test
    1300Z-1400Z, Jun 5
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    1630Z-1729Z, Jun 5
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    1900Z-2030Z, Jun 5
  • ARS Spartan Sprint
    0100WITH-0300WITH, Jun 6

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CQ.sk

Thank you for visiting this portal designed for all radio amateurs from OM and OK.

We bring you current information from the amateur radio world, however, we do not want to be narrowly focused on one area, therefore, new articles from each circle will be added to these pages practically daily, which concerns us HAMs.

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If you have any questions, please contact the administrator at: admin@cq.sk. Thank you and we look forward to meeting you at the band! 73 by OM0RX and OM0AAO.

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