[Boatanchors] Making Stable Inductors for 2 MHz

[Al Klase]

John,

Why don't you crystal control the thing and be done with it.  2.000 or 
2.048 computer rocks are cheap and easy to get.

Al

On 6/28/2011 9:20 PM, J. Forster wrote:
> Hi All,
>
> I'm working on a LORAN-A simulator for the DAS-1 on the MASSACHUSETTS and
> have a design question.
>
> Background:  LORAN-A transmitted 30-40 uS pulses, carefully times, on
> about 1800 to 2100 KHz. I have the timing =ssues solved.
>
> 'm now looking at building a stable, keyed oscillator in the above
> frequency range. My intention is to use a SS Hartley or Colpitts.
>
> 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.
>
> Any suggestions? I'm thinking of an air core inductor, maybe 1/2" x 1 1/2"
> with roughly 120 T of #30.
>
> Best,
>
> -John
>
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-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/