[ARC5] Making Stable Inductors for 2 MHz

[J. Forster]

Thank you. It looks very useful.

I've been using:

http://www.daycounter.com/Calculators/Air-Core-Inductor-Calculator.phtml

Best,

-John

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> On 6/29/2011 12:13 PM, J. Forster wrote:
>> Do you know if it makes much difference whether the inding is a single
>> layer solenoid, or if it needs to be like IF transformers, as long as
>> the
>> self-resonant frequency is high enough?
>>
> John,
>
> 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
>
> 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.
>
> 73, Bob W9RAN
>
>