Topics

Noise Power Ratio (NPR) metingen

• NPR Rauschgenerator;  NPR-Meßplatz; NPR – Q-Notch 40m-CW(B=700Hz@-100dB), (c) Ing. Kurt Hoffelner OE3HKL.COM
• Noise Power Ratio (NPR) Testing of HF Receivers, (c) Adam Farson VA7OJ/AB4OJ
• Tutorial Noise Power Ratio (NPR), Walt Kester, (c) Analog Devices MT-005
• Noise Power Ratio (NPR) metingen, Robert PA0RYL, (c) Electron jun-2017
• NPR und Rauschbandbreite, Werner Schnorrenberg, DC4KU, CQ DL 10-2020
• NPR and noise bandwidth, Werner Schnorrenberg – DC4KU dc4ku.darc.de August 11, 2020
• SDG6022X-Test, DC4KU, Werner Schnorrenberg, dc4ku.darc.de, Jan 22, 2020

EMI-RFI, Ferrieten en Common Mode Chokes

• KY9C Jim Brown:
  • A New Choke Cookbook for the 160–10M Bands
  • Guide to RFI, Ferrites, Baluns, and Audio Interfacing
  • Pin 1 Revisited Part 1, Pin 1 Revisited Part 2
  • Understanding How Ferrites Can Prevent and Eliminate RF Interference
    
• ON9CVD Bob van Donselaar
  • Presentatie voor ZX-ronde over magnetostrictie
  • Ferriet in HF toepassingen
  • Ferriet in EMC toepasssingen
  • Zelf meten aan spoelkern materialen
  • Inleiding en overzicht
  • Achtergronden en materiaal eigenschappen
    
• ON4WW Mark Demeuleneere
  • The EMI – RFI page
    
• W2FMI Jerry Sevick (SK)
  • Transmission line transformers
    
• G3TXQ  SE Hunt (SK)
  • Common-mode chokes
  • Baluns
    
• W1HIS, Chuck Counselman
  • Common Mode Chokes
    
• W8JI, Charles T Rauch, Jr.
  • Common Mode Currents en RFI in de shack
    
• IN3OTD
  • Measurements on common-mode chokes for antennas
    
• Fair-Rite Products Corp.
  • Fair-Rite_Catalog_17th_Edition.pdf
  • Materials
  • Tools&References
    
• Ferroxcube
  • Data Handbook
  • EMI Suppression Materials
  • Products
    
• Amidon Corp
  • Amidon Transmission Line Handbook
    
• RSGB
  • Interference FAQ
    
• ARRL
  • Radio Frequency Interference (RFI)
    
• Old Timers Club
  • Website
  • Nieuws Archief

Propagatie

• Live stream van het 3.5555 MHz baken door Hans, PA0EHG
• Propagatie metingen in de 80m band; door Hans PA0EHG
• Metingen aan het 3.555 MHz test signaal; door Koos PA0KDF
• Radio communication via NVIS; Ben A. Witvliet en  Rosa Ma Alsina-Pagès
• Calculating Ionospheric Doppler shifts; Lynn, K. J.W.
• Modern Methods for Calculating Ground-Wave Field Strength Over A Smooth Spherical Earth; Robert P. Eckert
• Handbook on Groundwave propagation; Radiocommunication Bureau

Doppler shift

• Dopplergrams; Peter Martinez G3PLX
• SBSpectrum; M Greenman ZL1BPU
• Intro HF propagation and Ionosphere; M Greenman ZL1BPU

Noise

• Presentatie over Noise (RF-Seminar 2016); Hans PA0EHG

Smith Charts

• Smith Charts; F. Caspers, CERN
• Cursus Smith Charts; Prof. C. Furse, Univ Utah
• Smith chart software; Prof. F. Dellsperger

Meetapparatuur

GPIB / HPIB / IEEE488 interface

• Raspberry Pi using Agilent 82357B
• Raspberry Pi using NI USB-GPIB-HS
• KE5FX GPIB Toolkit
• Gee Whiz, GPIB-to USB Converter Elektor jul/aug 2012
• Gee Whiz rev 2 PCB and software update
• Rudis wiki GPIB page
• GPIB IEEE488 Basics Tutorial
• HP Tutorial Description of HPIB bus (pdf)
• Prologix GPIB interfaces