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Information   Information
Finding Transformers   Transformers
About Capacitors   Capacitors
Types of Voltage Regulators   Volt Regulator
T13.8 Volt Power Supply   Schematics
Using Pass Transistors   Pass Transistors
Modification to Astron   Modifications
Parts   Parts
Transformer Symbol   Transformer Symbol
12 Volts to 5 volts   DC-DC Conversion
Repair your own power supply   Repair Your Own
Trace Side of Regulator   Reg PC Board
Finished View of Regulator   Assem. Reg PCB
Walk You Thru Repair   Repair Tutorial 1
Walk You Thru Repair   Repair Tutorial 2
RF Proof   RF Protection
Calculate Wire Size   Power Calculator
Ham Radio Links Page   Amateur Radio Links
Heat Sinks and Cooling   Heat Sinks Cooling
Crow Bar Over Voltage Protection   Crow Bar Circuit
Pass Transistor Schematic Configuration   Pass Trans. Config.
Output Transient Suppressor Network   Output Protection
Current Limit Resistor Network   Current Limiting
KB7KBT Amateur Radio Page   My Ham Radio Page
This web site design and maintained by GFM Designs   GFM Designs
Link to an awesome graphics program page   Graphic Program
Manufacturer Specification page..   Spec. Sheets
Replacement circuit page.   Replacement Circuit
Site Map page.   Site Map
Projects.   Projects
Power Supply Load Tester.   Load Tester


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  • Linear Regulated DC Power Supplies.
  • Transformer examples.
  • 2N3055, 2N3771, 2N3772 Pass transistor specifications.
  • 723 voltage regulator specifications.
  • Where to look for used parts.
  • How to build a power supply with used parts.
  • Projects
  • Trouble shooting.
  • Repair your own Power Supply
  • Repair tutorials.
  • Homebrew your own Power Supply.
  • Power, wire size, & current calculator.
  • Schematics for many different power supplies.
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  • Check out the project page !    HERE
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