[Boatanchors] Making Stable Inductors for 2 MHz

[J. Forster]

Hi,

Thanks very much. The TempCo of that part looks great. I think it might
just do exactly what I want.

Thanks very much,

-John

=================


> John,
>
> All of the -6 toroids at this link have 35 ppm/C:
> http://toroids.info/T50-6.php
> and there is a handy toroid calculator here:
> http://kitsandparts.com/tcalc.html
>
> Steve
>
>
> On 6/29/2011 10:28 AM, J. Forster wrote:
>> Hi Steve,
>>
>> I'll take a look at powdered iron. Thanks.
>>
>> I'd really prefer not to mess with temp comp caps, unless absolutely
>> necessary.
>>
>> Thank you,
>>
>> -John
>>
>> ====================
>>
>>
>>> On Jun 28, 2011, at 9:20 PM, J. Forster wrote:
>>>
>>>> The frequency stability requirement is not great... about +/- 5 KHz,
>>>> but
>>>> this is larger than can be achieved with ferrite cores I've looked at,
>>>> which are>  0.05% / deg. C.
>>> I'm no expert, but isn't the conventional wisdom to use iron toroids
>>> rather than ferrite for oscillator tank inductors, for exactly this
>>> reason
>>> of temperature stability? It might also require a temperature
>>> compensating
>>> cap of the correct tempco.
>>>
>>> Best regards,
>>> -Steve
>>> --
>>> Steve Byan<stevebyan at me.com>
>>> Littleton, MA 01460
>>>
>>>
>>>
>>>
>>>
>>
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>
>