[sdiy] Yusynth VCO

[Ian Fritz]

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