USING AN INDUCTOR
FIGURE A:Coilcraft PCH Series
Coilcraft PCH inductors
Mouser inductors A-D
Mouser inductors E-H
Although this site recommends using a gyrator circuit, there may be some people who insist on using a real inductor. The circuit we use here requires around 18mH inductance, but the internal resistance should be less than 30Ω. This type of inductor may be difficult to find and purchase. There are only a few 'one-stop shop' electronics parts suppliers (including: Digi-Key , Jameco , Mouser , and Newark ) but only two of them supply the inductors we need. I have also found suitable inductors on Coilcraft.
There are only 2 Coilcraft inductors that I have found to work so far: the PCH-45X-186KLT and the PCH-45X-226KLT.
The PCH series is shown in Figure A and the inductors listed above are show on a breadboard in Figure B. You can find a comparison of various PCH inductors here. The inductors use the same cores, with varying wraps of wire.
There is also one inductor from Newark that works well--the 53K4801:
|Newark Part #||Mfg.||Mfg. Part # ||Inductance ||Internal Resistance
|53K4801||Vishay Dale||IHD3EB223L ||15mH ||22 Ω
You can see this inductor in Figure C with a penny for size-comparison.
Finally, I have found a number of inductors from Mouser that work quite well. Their specs are listed below in the table and they are shown in Figure D and Figure E:
A special thanks to www.chuacircuit.com for recommending Coilcraft for good inductors! If anyone has any other experience with ordering inductors for Chua circuits, please contact me.