[sdiy] Yusynth VCO

[cheater cheater]

You are looking at it linearly instead of exponentially.

D.

On Sun, Apr 4, 2010 at 20:51, Ian Fritz <ijfritz at comcast.net> wrote:
> At 12:02 PM 4/4/2010, yves usson wrote:
>>
>> The initial frequency was 881Hz and initial temperature 22.2°C, the final
>> frequency was 877.5Hz and
>> final temperature of 23.7°C.
>> The slope of the measurement curve gave me a drift of -2.27Hz/°C that is
>> -0.05%/°C or -500ppm/K (if I am correct ?)
>
> Hi Yves --
>
> Thank you very much for going to the trouble to look that up for me.  Very
> few manufacturers are willing to give numbers.
>
> I get a different result, though.  I must be misunderstanding something.
>
> The fractional frequency change per degree is 2.27 / 881 or .26% or
> 2600ppm/K, is what I get.
>
> What am I missing?
>
> Regards,
>
> Ian
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