Hi,
If you search the internet, you should come across a design by Warren S.
It's basically the same type of oven controller that is used in the
internal oven for that oscillator.
I did a surface mount version of his design a while back. I've been
running it for quite a while now. IMO it is helping to reduce the
thermal drift of the oscillator.
Bob has pointed out in the past that the outer oven was not intended to
be active all of the time. This is probably true. That said it seems to
help in my setup.
If you are unable to find the documentation, please let me know. I can
try to dig it up when I get home.
Dan
On 8/3/2015 12:00 PM, time-nuts-requ...@febo.com wrote:
Hi
The “external” heater on the Z3801 OCXO is only needed if you are regularly
running below -20C in your environment. Other than
the alarm signal, there is no harm in letting it simply shut off forever.
Bob
>On Aug 2, 2015, at 8:56 AM,tim...@timeok.it wrote:
>
>
>Hi,
>I have seen, but I do not remember where, someone have rebuilt the external
oven controller to complete a stand alone OCXO removed from an HPZ3801A.
>Can you hep me to find the document?
>
>Luciano
>timeok
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