[ARC5] Crystal work-around question. OT

[Tom Lee]

As Ken has already noted, there was something dodgy about your maths. :)

You want to normalize the shift to the base frequency. That means divide 
400Hz by 10.24MHz. Here, that works out to just a bit below 40ppm. 
That's a happy result. You will likely find it achievable.

Let us all know how your experiment turns out!

-- Cheers,
Tom

-- 
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
http://www-smirc.stanford.edu

On 9/23/2020 11:26, J Mcvey via ARC5 wrote:
> The crystal in question is a sealed HC25U type.
> The frequency is low by about 400 Hz, so it can't be padded. Could it 
> be "brought up" with an adjustable series cap?
> I have a new one on order, but was wondering if anyone had a "fix" 
> without replacing the crystal?
>
> I suspect too much 'pulling" would cause instability if there was a way.
> What say you guys?
>
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