Producing wound components - Adjustable Inductors
The Faculty Stores hold adjustable (slug tuned) inductance assemblies
suitable for low current inductors, transformers and tuned circuits in the
range 50kHz to 200MHz. Any inductance between about 1mH and 100 nano-Henry
can be produced and also made adjustable by 15% or more. Q factors between 100 and 200 can be achieved.
Stores
code | Optimum
range |
Al value
|
|---|
| 2L1120 | 50kHz - 2MHz | 24
|
| 2L1119 | 2MHz - 12MHz | 25
|
| 2L1132 | 12MHz - 200MHz | 8.7
Types of Inductance Assembly
|
Each assembly is supplied in five parts (see photo):
- A base with six connection pins
- A winding former
- A ferrite cup core
- A ferrite screw core (slug)
- An aluminium screening can
Fix the former into the base using glue (hot-melt is quickest).
Apply the windings by hand because there usualy won't be enough turns to justify
using the coil winder.
Do not wind too close to the top of the former or else the cup will not
fit over it. Feed the ends of the wire down the pins in the base
and solder the wire to the pin where the wire enters it.
Screw the core into the former and then slide the cup over the windings.
Lastly fit the screening can over the whole assembly.
Your printed circuit board can be drilled according to the pattern below.
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Coils index]
E-mail:
R.Clarke@surrey.ac.uk
Last modified: 2001 March 11th.