I remember reading somewhere on this list that over tightening the nut that
holds U800 to the PCB can possibly cause the chip to fail. Seems it applies
stress to the die and bond wires. I don't remember where I saw it.
?
?
?
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----- Original Message -----
Sent: Sunday, February 24, 2013 1:45
AM
Subject: [TekScopes] Re: New here with a
2465 to clean up
?
Cslim,
Great suggestions. I think I will combine a version of 1 and
3. I will buy steel "mending plates", the kind that look like door hinges but
are really just steel plates with holes. Drill new holes to line up with the
screws. And use this DIY steel strap to hold a copper plate against U800. Will
probably put a bit of thermal grease between the copper plate and U800. I will
taek pictures when I have this working. Thanks for a great
idea(s).
Mac
--- In TekScopes@..., Chin
Siang Lim wrote:
>
> I do it three quick and dirty ways:
>
1. Buy suitable door hinges. The two screw holes are offset nicely.
Get
> the right ones, add heat sink and screw into the stud(s) to seat
them flat
> on top of u800. Add washers, or screws, where
needed.
> 2. in DIY shops, buy tags with two holes, similar size to
large paper
> clips, and screw them on.
> 3. My favourite- get
small thick copper plates , a little smaller in size
> than u800. Get
some valve/tube solder lugs. Use the lugs to solder onto the
> cooper
plate to hold the copper plate in place.
>
> As long as the
height of these heat sink does not exceed the height of the
> two side
screws, no fear of shorting voltage to casing.
>
> Cslim
>
> On Sunday, February 24, 2013, Patrick Wong wrote:
>
>
> **
> >
> >
> > Hi Steve,
> >
>
> Here is one possible solution:
> > >
>
>
> > Basically a low-profile heat sink is needed that will not
contact the
> > cabinet bottom.
> >
> > Patrick
Wong AK6C
> >
> > --- In TekScopes@...
> 'TekScopes%40yahoogroups.com');>, Steve wrote:
> >
>
> > > I've seen reference to additional cooling for U800 in
several postings.
> > > Is there somewhere on the internet that
suggests how to go about doing
> > that?
> >
> >
> >
>
