Operator Herman
QRV on 70 cm


QTH-Locator: JO21CE

Index :
  Hambeurskalender :


  My collection of old radio's :

 Old Radios

  DVB-T Antenna :

 DVB-T 550 MHz Fractal Antenna

  SDR Software :

 SDR RTL Spectrum Analyzer Software

  Before you go into SDR :

 SDR: you should know this (external link)
 SDR interference and solutions
 READ THIS FIRST: SDR Antenna Considerations

  Antenna's for SDR:

 SDR: Two Modified Stock Antenna's (indoor)
 SDR: PA0FBK VHF/UHF (Dualband 2m-70cm) Antenna
 SDR: Wide-Band VHF-UHF Antenna DR2000 (test)

  SDR Mini-Whip antenna's :
  HF Mini-Whip Basic Antenna and de-noising (2022)
  HF Mini-Whip non-smd small Antenna v1.1
  HF Mini-Whip improved smd Antenna v1.2
  HF Mini-Whip smd improved small Antenna v1.3
  Other SDR Antenna's:
  End-Fet Antenna for the HF Bands ( New )

  Double Magnetic Loop Antenna for the HF Bands ( New )

  SDR HF Up-converters (0-30 MHz) :

 RTL-SDR Basic HF UP-Converter V1.0
 RTL-SDR Mini HF UP-Convertor V3.0
 RTL-SDR USB HF UP-Convertor V5.0 ( New )

  Other Projects :

  DDS Generator 1-60 MHz for cheap AD9850 Module

  Making the OZ2CPL HF Power meter

  Make your own coils for VHF-UHF

  Digital Zener Diode Tester 0 - 30 Volt ( New )

  Kruidvat Radio and a DRM Mixer

  Kruidvat Radio + Tune LED

  Gel battery charger with anti-sulphation

  Simple 1-30 MHz Generator with a LTC1799

  The on1bes Toko Coil & Watch Crystal Tester ( Updated )

  LC Meters :

 Improved L and C Meter with PIC16F628 (Update 2021)

 Elektor Pico-C / frequency and period meter

  Labo :

 Calculate you antenna lenght

 Calculate Coils

 Link :  Varicaps   Measure with a Varicap adapter

  FET Specials :

 Two FET Testers

 FET Oscillators

 FET HF opamps

  Microcontroller : Atmel & AVR :

 AT89C2051 Testboard

 AT89C2051 Programmer (obsolete)

 AVR ATTiny 2313 Test Board

 AT89C2051 IR Decoder with Relais

  Microcontroller PIC µP Pages :

 PIC µP controller families

 Modified Serial PIC µP JDM Progammer

  My first computer was a Tandy TRS-80 anno 1980 !
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