[sdiy] Tempco vs. "Substrate Oven" in VCO and VCF

[Mattias Rickardsson]

On 29 February 2016 at 11:45, Roman Sowa <modular at go2.pl> wrote:
> Controlled oven obviously takes more power to heat it, so that's probably
> the reason for not so widespread solution. You need to heat it up to the
> temperature that is not likely to happen in regular conditions, at least 40
> deg. C. About 40-100mA to waste just on heating.

40 mA seems like a lot of current just to push the temperature up 15
degrees... but it of course depends on how well insulated the chip is.
The uA726 seems to draw around 7 mA in room temperature if I read the
datasheet correctly, and I was under the impression that it's working
at a quite high temperature.

The Moog Prodigy has some heating going on in its oscillators (to the very left)
http://www.emusic-diy.org/MoogManuals/Prodigy?action=AttachFile&do=get&target=prod9.gif
or is it something else?

/mr