[sdiy] New Vco

[tomg@efm]

>> Seems to go flat about 3 octs.... and I couldn't get a saw output.
> I can't imagine that, because the pulse is shaped out of the sawtooth. 

I got the saw...Yeah! Don't know what I did wrong the first time?

> To make the tuning curve better I think I'll add that Franco compensation, 
> its not a big deal, but I need some time to redraw my circuits. I'll all 
> let you know.

I sat your core on my expo and got almost 8 octaves 1Hz - 33KHz
range.  It does go flat as freq reaches about 1KHz...That's a little to 
low. 

I changed the freq-pot resistor from 150K to 100K the neg-ref resistor 
from 39K to 33K and the current resistor from 1.5K to 4.7K

> but where is the temperature compensation?! 

Make that 1K a tempco....if you want....  

Tom