1. RF Components & Circuits VE3KL Session 1
Ferrite and Powdered Iron Toroids
Transformer, SWR Bridge, Low-Pass Filter
Ferrite
Ferrite SWR Bridge Kit
FT :1 Transformer
Kits and Parts

2. 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

3. Hardware Tools Required
60 Watts
Very Important
With new blades
Plus a small vice, optical magnifier, laptop PC

4. Software Tools & Links : Free
Filter Design Software Elsie:
Zplots: (Optional: uses Excel) Can use VE3KL Software
Kits and Parts for SWR Kit Manual and Data Sheets,
Download the Toroid Calculator (include VB6 Runtime)
Look under Toroids button

5. Materials Selection T50-6 Powdered Iron FT50-43 Ferrite
Low Loss Transformers
Transmission Line Transformers
EMI Filters
High Q Coils/Resonators
Band Pass Filters

6. T50-6
Powdered
Iron Core

7. 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

8. Fair-Rite 43 Material

9. Micrometals Powdered Iron Cores

10. 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

11. End of Session 1
Clockwise
Ferrite Iron