On Sun, 19 Oct 2014, Brian Reay wrote:

On 19/10/14 08:33, Lostgallifreyan wrote:
Brian Reay wrote in news:63445296435368038.386267no.sp-
:

I've not looked into a source of this tape but it would seem to be an
easily technique, if a suitable tape can be
obtained.


Definitely! If you can find out what is is, where to get it to try it, and
the temperature and duration needed for the ovenm, please post what you
find.
Point taken about aluminium, but I used to collect scrap metal in a city at
one time, and noticed that anything that got thrown out was usually a tad
less than exotic. Mostly very ductile. When I want anythign better I
invariably have to pay for it, and then I know what I'm getting. eBay's not
bad for loose bits.


I'd not even looked for it until just now. But a quite 'google' produced
this:

http://www.hexcel.com/products/indus...adhesives-main

It refers to 'film', which I assume is the tape I was thinking of.

As for sources, that may be an issue. Many of these specialist chemically
type things are so-and-so's to get hold of if you are not
in the industry. I still have some contacts who can sometimes point me
at suppliers willing to help.

I tend to buy boxes, a lot of my projects are more for the technology than
'looks' so diecast boxes are de-riquer in most cases, especially for RF
projects where you can have several modules in isolated boxes etc.

When looks don't count, you can get away with all kinds of things.

I've seen people build up modules in old IF transformer, though now that
source has mostly dried up. Real old IF transformers have a lot of space,
AA5 type transformers more for a couple of stages.

Cans that food comes in has been used as chassis in some famous projects,
but slap a piece of circuit board across the top, and you've got a
shielded box to build a module into.

I've played with making more traditional boxes out of cut up tin cans,
that works but didn't seem worth the effort.

Module boxes can be made out of copper circuit board, but getting them
nice requires some effort.

For larger boxes, computer power supplies offer up nice boxes. Cover any
side with the wrong holes with circuit board (well it could be aluminum,
but I have more circuit board lying around than sheet aluminum. Those are
really pretty common, I'm not finding new enough computers on the sidewalk
to bother bringing home, but I may strip out the power supply, to use as a
power supply or for the box.

I see lots of satellite and cable boxes, thsoe can useful for larger
projects, though sometimes one has to come up with a new front panel.
Sometimes the power supplies are separate inside the box, so you can reuse
that as is.

Michael