[time-nuts] HP10811 Oscillator Thermal Fuse

Van Horn, David david.vanhorn at backcountryaccess.com
Thu May 11 22:01:55 EDT 2017


The original article was from Kodiak consulting.  Good thing I saved a copy. 
Thanks for the link to this one. 

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Donald E. Pauly
Sent: Thursday, May 11, 2017 6:57 PM
To: time-nuts; Donald E. Pauly
Subject: [time-nuts] HP10811 Oscillator Thermal Fuse

https://www.febo.com/pipermail/time-nuts/2017-May/date.html

While I find traces of your article quoted, it seems to have vanished.
It lead me to this interesting article of 16 pages on electronic fires by a fire investigator.  There is a lot here for designers when it comes to preventing fires from your products.  I would never have dreamed of some of the ways that fires can start.

http://dri.org/docs/default-source/dri-online/course-materials/2016/fire-science/08-dangerous-things-come-in-small-packages.pdf


πθ°μΩω±√·Γλ
WB0KVV

---------- Forwarded message ----------
From: Van Horn, David <david.vanhorn at backcountryaccess.com>
Date: Thu, May 11, 2017 at 4:31 PM
Subject: Re: [time-nuts] Fwd: HP10811 Oscillator Thermal Fuse
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>


There's an excellent article out there on the web called "Low Voltage, the incompetent ignition source"  I highly recommend a read.
I dealt with a case like this a couple years ago.  Failed fet in an H bridge caused a fault which the brick SMPS picked up as a short, and went into "hiccup" mode on.
The energy delivered in "hiccup" mode was about 1W average, and that was enough, after several hours, to cause ignition and sustained flame on the PCB.

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