[time-nuts] HP10811-60111 oven failure + repair of *thermal* fuse

Achim Vollhardt avollhar at physik.uzh.ch
Mon Oct 31 07:20:38 UTC 2011

Fellow Time-Nuts,
the polyfuse was finally replaced now with a thermal fuse. The closest I 
got my hands on was 115degC. Fits nicely and oven is heating up again :)

Pictures are updated (well, the last picture at least.. just for reference):



> Fellow Time-Nuts,
> first of all thank you for all the feedback and advice.. especially
> about the mistake of putting in a current protection rather than a
> temperature protection. I mislead myself into using a polyfuse as these
> work thermally as well :( That said, 'Shera' locked immediately again
> yesterday evening so the basic functionality is restored.
> Oh well, I know now how to open the can and my local component supplier
> has some 105degC-ish thermo switches on stock which even look very
> similar to the one installed.. to be done next week :) Photos will be
> updated afterwards. Some folks even advised to bridge the fuse, but I
> believe that this very fuse does have its justification. At the end of
> the day it's only another hour or so of work.
> Regards,
> Achim

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