[time-nuts] 10811 Outer oven controller schematic

[Bob Camp]

Hi

If a 10811 oven is simply not working, the output will be > 400 Hz off frequency.

Bob

On Jul 19, 2013, at 12:48 PM, ed breya <eb at telight.com> wrote:

> Paul,
> 
> If the 10811 is that far off, are you sure the oven is working?  A few years ago mine had a failure of a particular date code range of the opamp that controls the oven, that were prone to failure.at high temperature. The symptom in the Z3801A was that the outer oven seemed bad - it did not turn on, but it was because it was waiting for the inner one to reach nominal temperature, but it never did. Once you get it all apart, replacement of the IC is no big deal, but what a PITA to get to it. I vaguely recall posting the whole story on that website that has big coverage of the Z3801A - I can't remember the name, since I haven't been there in a while, but it should be easy to find. The website had all kinds of Z3801A info, including a nice writeup on how to take the oven apart, which is where I started.
> 
> Ed
> 
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