[ARC5] Making Stable Inductors for 2 MHz

[Kenneth G. Gordon]

On 29 Jun 2011 at 12:37, Robert Nickels wrote:

> Might I suggest a very handy calculator that can be found for free
> download at: http://www.dl5swb.de/html/mini_ring_core_calculator.htm

Yes. I use this. It is very good.

> It includes full characteristics on common toroid cores, but also a
> set of easy tools for solenoid type air core inductor calculations. 
> Using it I found a decent L-C combination for 2 mhz based on 30 uH
> inductance requires about 43 turns on a 1" diameter core, taking up
> about 1" of winding length.  It's easy to compare various
> configurations but you should be able to get the desired coil with a
> single layer design.  Ceramic has better characteristics, but I've had
> good results using common PVC plastic pipe and fittings.

In fact, PVC is unusually temperature stable.

Ken