CVARS    K7PG
  The Chehalis Valley
 Amateur Radio Society
A  501(c)(3) Non-profit

      ARRL special service club

Electronics Workshop - January 25, 2024

Time & Location:

  1. Transistor Testing
  2. Sealed Lead-Acid Battery Charger
  3. Handheld Transceiver Lithium-Ion Battery Charger
  4. LED Tester

  5. Potpourri: Non-Contact Voltage Tester

Transistor Testing:
  1. "PRESTO! Transistor Checker from VOM":
  2. "Simpson 260-8 VOM":
  3. "How to Measure Transistor Leakage and Gains for Germanium, Silicon, and Sziklai Pairs":
  4. "Darlington Transistors" (includes a discussion of Sziklai transistor pairs):
  5. "Darlington vs. Sziklai Pair":
  6. Forrest Mims' "Engineer's Mini-Notebook":,%20Device%20Packages,%20Design%20And%20Testing.pdf
Sealed Lead-Acid Battery Charger:
  1. "Panasonic LC-R123R4P Data Sheet":
  2. "Optim Engineering CBA III":
  3. "Gel Cell Charger/Maintainer":
Handheld Transceiver Lithium-Ion Battery Charger:
  1. "TYT-368 Charger Modification":
  2. "XL4001 Buck DC/DC Converter":
  3. "LM358 Dual Operational Amplifier":
  4. "MB10F Full-wave Bridge Rectifier":
  5. "Surface Mount Resistor Code Calculator":
  6. "Colour Code used on Welwyn Band-marked Resistors":
LED Tester:
  1. "Typical IV Curves For Various Colours of LEDs":
  2. "Loadlines For Various Resistors on 5 V Supply":
  3. Wikipedia "Current Source":

Non-Contact Voltage Tester:
  1. "Klein Tools Non-Contact Voltage Tester Pen, NCVT-1":
  2. "How Does a Non-Contact Voltage Tester Work?":

 Updated 01/22/2024  │  Email webmaster   │  Facebook Link