How to build an astronomical photometer - My links are being updated, some others died (trying to update) 

by Dominic-Luc Webb ---
last updated 26 Dec 2010

  • 931B based photomultiplier type photometer
  • PMT imaging example - piece of paper on a microscope
  • Dominic's 12 stage Cockroft-Walton voltage multiplier
  • Links to other people's high voltage power supplies
  • Siemens SFH2030F based 950 nm (infrared) PIN photodiode based high gain photometer
  • A cute IR extender using the SFH2030F - note the red indicator LED
  • Philips specs on ferrite transformer cores, click Products-> Soft ferrite cores and accessories
  • LEE filter spectral curves (RGB and IR)