[time-nuts] 10811 Thermal fuse?

John Miles john at miles.io
Wed Sep 3 15:23:00 EDT 2014

> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of David
> McGaw
> Sent: Wednesday, September 03, 2014 8:01 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] 10811 Thermal fuse?
> Actually, in the unit in which the fuse had opened, it had protected the
> unit when the thermistor failed open.  Having seen this happen, I
> recommend it be replaced.  The Panasonic part is 63 cents.
> David

Was the oven in a runaway condition?  Like Bob, I've never seen a situation where the thermal fuse has actually done anything useful.  It seems like the inner oven will go into full-blown China Syndrome before the thermal fuse on the far side of the outer PCB gets hot enough to fail.

-- john, KE5FX
Miles Design LLC

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