William Donzelli wdonzelli at
Sun Oct 11 21:21:27 CDT 2020

How long do you think those poor machines cooked? I bet far, far
longer than the soldering temperature spec. likes.


On Sun, Oct 11, 2020 at 10:06 PM dwight via cctalk
<cctalk at> wrote:
> Most components can stand soldering temperatures. It is clear that it was only hot enough to melt plastics. That isn't even hot enough to damage boards. It is wasn't powered at the same time, it is unlikely to have been harmed. I've seen cases where there were flames in the board area and parts were not damaged. These were mostly wrapped in their cases. Melted plastics most likely protected the boards from dangerous temperatures.
> Dwight
> ________________________________
> From: cctalk <cctalk-bounces at> on behalf of jim stephens via cctalk <cctalk at>
> Sent: Sunday, October 11, 2020 6:49 PM
> To: William Donzelli via cctalk <cctalk at>
> Subject: Re: FIRE SALE!
> On 10/11/2020 6:34 PM, William Donzelli via cctalk wrote:
> >> I suspect much of the electronics is fine. It would be good for someone wanting backup cards.
> > You must be joking. Those cards are done. Any chip that is still
> > operational will likely fail upon or shortly after power is applied.
> >
> > --
> > Will
> >
> I agree.  Especially the ones heated high enough for the melted plastic
> or scorch damage.  A radiative and convective heat soak is pretty damaging.
> Consider the flow temperature of the materials inside.  Unless the fire
> was  flash fire, the entire thing would have been heated for some amount
> of time (15 minutes minimum usually, to 45 minutes) due to response time
> of the equipment.
> Not evident in the photos would be possible contamination from either
> fire suppressant materials or water to extinguish the blaze.
> Like I said, Ethan is looking for a cabinet for an 11/70 stripped out of
> such, and these probably are okay for that.  Maybe some of the other
> bits after inspectiong, but I'd not trust the boards up front.  It would
> be a project I'd want a solid shop of parts to do testing for every
> board involved to certify they work.
> Most people I know have one system in their basement, lab or garage, and
> I'd personally not want to put boards from a source like this into such,
> unless i had nothing to lose.
> thanks
> Jim

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