Producing wound components - Adjustable Inductors
A guide for staff and students at this University to producing
The Teaching Labs 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.
Each assembly is supplied in five parts (see
|2L1120 ||50kHz - 2MHz ||24
|2L1119 ||2MHz - 12MHz ||25
|2L1132 ||12MHz - 200MHz ||8.7
Types of Inductance Assembly
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.
- A base with six connection pins
- A winding former
- A ferrite cup core
- A ferrite screw core (slug)
- An aluminium screening can
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.
Last modified: 2002 February 9th.