VCO breadboard

[Jim Patchell]

    Preliminary schematics are posted.

    http://www.silcom.com/~patchell/jp2rest/dualvco.pdf

    This is not a finished schematic.  I post this stuff mainly so I can print
it.  I don't have a printer at home, so I download it an print it at work.
And taking a second look at the schematic that is posted, it is one rev back,
but you should be able to get an idea of what I am doing.

    I am hopefully going to set up the experiment this weekend to check the
drift.  A Stanford Research Systems SR620 is accidently going to go home with
me for the weekend to take the measurements (this thing is close to being the
ultimate frequency counter, the HP equiv is better, but this is the instrument
my company got me).  I have a block of blue ice in the freezer as we speak, a
heating pad on my dresser, and Friday I will pick up one of those cheap foam
ice chests, I mean enviromental chambers, from K-Mart.

    So far, the finger test has indicated that the thing seems to be stable,
but that is the only result.

    -Jim

Ian Fritz wrote:

> Jim --
>
> I'd be interested in knowing more about your compensation experiments. I
> hope you'll keep the list posted on your results!
>
>   Ian
>
> ----- Original Message -----
> From: <patchell at silcom.com>
> To: <synth-diy at node12b53.a2000.nl>
> Sent: Monday, May 15, 2000 7:47 AM
> Subject: VCO breadboard
>
> >     Got enough of a breadboard for a temperature compensated VCO going
> > last night to start doing some serious testing.  I need an environmental
> > chamber.  I figured I would go over to K-Mart tonight and purchase one.
> > And when I am done making the measurements, I figured I could use it to
> > keep beer on ice while at the beach.
> >
> >     -Jim
> >
> >
> >