[sdiy] Ovens for oscillators?

[Jim Patchell]

    If you go to the last pages of:
http://www.silcom.com/~patchell/smb1/smb.pdf, you will find the schematics of
the VCO's (that will hopefully be tested in just a couple of weeks now) of what
I did.  J.H. also has a similar circuit on his web site, and I think Rene S. has
a different approach on his web site.  I differenciate what I (and JH and RS)
did from what Paia is doing on their 9720VCO, although it is similar.  The
difference is that in the circuit I did, I am using the expo converter for
measuring it's own temperature, where as in the Paia circuit, the temperature is
measured by something else (they use an OTA to do it).  My experiments showed
that this methode definately worked.  But, until I actually try to make some
music with the thing, I won't know for sure.

    -Jim

CHoaglin at aol.com wrote:

> In a message dated 3/6/01 5:08:52 PM Pacific Standard Time,
> patchell at silcom.com writes:
>
> <<     3. Electronic Compensation, needs no tempco, but is more complicated,
> and
>  does introduce some noise.
>      4. Ignore it. (This is the Ostritch Solution).
>   >>
>
> How's electronic compensation work? I've read lots about tempco stabilized
> stuff, but not a whole lot about active compensation....Method number 4 is
> the usual one for me, since I don't notice imperfection much at all when it
> comes to sound. (probably has something to do with going through 6 sets of
> ear tubes and listening to atari teenage riot on PC speakers for years)
>
> Chris