RF Components & Circuits VE3KL Session 1 Ferrite and Powdered Iron Toroids Transformer, SWR Bridge, Low-Pass Filter Ferrite Ferrite SWR Bridge Kit FT50-43 4:1 Transformer Kits and Parts
Low-Pass Filter… Powdered Iron Cores T50-6 9 Turns 8 Turns Input Output 8 Turns #24 9 Turns #24 Circuit Board and BNC Connectors in Kit Two T50-6 Toroids 9 and 8 Turns
Hardware Tools Required 60 Watts Very Important With new blades Plus a small vice, optical magnifier, laptop PC
Software Tools & Links : Free Filter Design Software Elsie: http://tonnesoftware.com/elsie.html Zplots: (Optional: uses Excel) Can use VE3KL Software http://www.ac6la.com/ Kits and Parts for SWR Kit Manual and Data Sheets, Download the Toroid Calculator (include VB6 Runtime) Look under Toroids button http://kitsandparts.com/index.php
Materials Selection T50-6 Powdered Iron FT50-43 Ferrite Low Loss Transformers Transmission Line Transformers EMI Filters High Q Coils/Resonators Band Pass Filters
T50-6 Powdered Iron Core
Inductance Formula L = AL*N2/1000 uH N = nr. of Turns AL = 4 for T50-6 Iron Powder Core AL = 440 for FT50-43 Ferrite Core These numbers from Micrometals Data Sheet
Fair-Rite 43 Material
Micrometals Powdered Iron Cores
FT 50-43 & T50-6 Make 1 ferrite coil (9 Turns) Make 2 powdered iron coils (8T and 9T) 8 Turns, 9 Inches: 9 Turns 10 Inches Measure L {Low Frequency with L/C Meter} Check Measurements against Formula Record data for filter design Ferrite Iron
End of Session 1 Clockwise Ferrite Iron