Amateur Radio Technical Notebook – GM3SEK

Best of ‘In Practice’ on the web – Articles and resources of long-term interest, including switch-mode power supplies.

Russian GS35b triode - Amateur Radio Technical Notebook - GM3SEK

Amateur Radio Technical Notebook – GM3SEK

The Triode Board – PC board and Kit for Triode PA control and protection

The Tetrode Boards – PC boards and Kit for Tetrode PA control and protection.

Cost-effective Ferrite Chokes and Baluns

  • Experiments with the LM2575
    The standard buck regulator circuit delivers a +5V output. This is a rather straightforward circuit and will operate with a wide spread of component values. [...]
  • Torch or Flashlight Circuit Improvements
    I fixed a China Torch with New LEDs and a Diode, it failed probably on a drop shock, the battery wire cut … then when [...]
  • Professor Mark Cseles Projects
    “I present, below, a collection of projects I have worked-on over the past few years. For over a decade, I had taught both embedded systems [...]
  • Vintage Radio Information
    Vintage Radio Information This website is a repository and archive for a range of documents and other material of interest to collectors of vintage radios. [...]
  • Electronic Kits and Tools ApogeeKits
    Electronic Kits and Tools ApogeeKits Home of high quality electronic kits, circuits, tools, test equipment, instruments, tutorials, products and plans for the beginner hobby kit [...]
  • LED Lamp – Simple Bed-Lamp Circuit
    LED Night lamp, Clock Lamp to see time at night. It is a Green Lamp just 50mA, but its Blue in Color. From Schoodles This [...]
  • Antenna-amplifier with BFT 12 for FM-range
    The only way to improve the reception of FM-signals or particularly of stereo FM-signals under disadvantageous receiving conditions is to amplify the antenna signal. This [...]
  • LED Christmas tree – Learning Electronics
    Letter from Chris of PyroElectro.com in 2013 – Happy Holidays! Here’s a project I know your readers will love! It’s an all-digital-hardware LED Christmas tree [...]
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