[Milsurplus] Quick n dirty crystal selectivity - it no workee

[AKLDGUY .]

> It's near the end of my day, and i'm disinclined to do a lot of work; I'm
> feeling lazy. But i took a quick look at
> http://www.electronics-tutorials.ws/oscillator/crystal.html
>
> They work the example of a 10 MHz crystal with an equivalent inductance of
> 2.55 mH and q ~ 25,000. Shure Brothers tell me the Xl for this inductance at
> 10 MHz is ~150k ohm.
> You can see where this is going.
> Now, are you quite sure the Rs of my crystal is 10K ?

As I said originally, the Xl of the inductance negates the Xc of the
capacitance, leaving only the resistance. The value of 10K for it
was pulled straight from the 1978 ARRL Handbook, page 51.

73 de Neil ZL1ANM


On 2/16/16, Hubert Miller <kargo_cult at msn.com> wrote:
> Last Thanksgiving i sold some heavy metal to a couple mil-vehicle people in
> Seattle area. One fellow just emailed me he got the BC-654 receiver working
> and he’s going to get a ham license.
> I think that’s just great. They’ll help to keep the interest alive.
>
> -Hue
>
>
>
> From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of
> hwhall at compuserve.com
> Sent: Monday, February 15, 2016 9:01 PM
> To: kargo_cult at msn.com; milsurplus at mailman.qth.net
> Subject: Re: [Milsurplus] Quick n dirty crystal selectivity - it no workee
>
>
>
> Sounds like some really good projects! Good luck with the downsizing.  Hope
> it all finds its way to good new homes.
>
>
>
> -Wayne
>
>