I'm thinking of reinforcing solder points on dropper resistors, subjected to
vibration. Forcing a small pad of mesh over the lead and burying in the
solder.
Other than proper suppliers for large quantities, what sort of
shops/conventional applications would use it.?
My local decent hardware shop has nothing , a local machine mart has
expanded brass sheet but that is too coarse. Would there be a
gardening/horticulture use?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

"N Cook" wrote in message
...
I'm thinking of reinforcing solder points on dropper resistors, subjected
to
vibration. Forcing a small pad of mesh over the lead and burying in the
solder.
Other than proper suppliers for large quantities, what sort of
shops/conventional applications would use it.?
My local decent hardware shop has nothing , a local machine mart has
expanded brass sheet but that is too coarse. Would there be a
gardening/horticulture use?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/



I have done this sort of thing in the past, and have just tightly wrapped a
few turns of tinned copper wire around the leg, before burying the whole in
solder. Seemed to work ok.

Arfa

N Cook wrote:
I'm thinking of reinforcing solder points on dropper resistors, subjected to
vibration. Forcing a small pad of mesh over the lead and burying in the
solder.
Other than proper suppliers for large quantities, what sort of
shops/conventional applications would use it.?
My local decent hardware shop has nothing , a local machine mart has
expanded brass sheet but that is too coarse. Would there be a
gardening/horticulture use?

Hi...

Just a thought off the top of my head... how about something so
simple as a bit of screen like we might find used in windows/doors
to keep the dratted mosquito's out?

Perhaps you could find some unfinished, or if need be dip a chunk of
it in paint remover to clean it up?

Take care.

Ken

Arfa Daily wrote in message
...

"N Cook" wrote in message
...
I'm thinking of reinforcing solder points on dropper resistors,
subjected
to
vibration. Forcing a small pad of mesh over the lead and burying in the
solder.
Other than proper suppliers for large quantities, what sort of
shops/conventional applications would use it.?
My local decent hardware shop has nothing , a local machine mart has
expanded brass sheet but that is too coarse. Would there be a
gardening/horticulture use?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/



I have done this sort of thing in the past, and have just tightly wrapped
a
few turns of tinned copper wire around the leg, before burying the whole
in
solder. Seemed to work ok.

Arfa



Thats what I've done before and bits of desolder braid and stripped coax
shielding and also scraping back board/trace lacquer for more contact area
and folding back leads along traces before soldering.
Eventually found a hobby shop with what I was after
2 copper and 2 brass 80 mesh 5 x 6 inch sheets, bit finer than I was after
but finer is better than coarser.
Amaco of Indianapolis , Wireform Metal Mesh and Wiremesh woven Fabric.
Presumably bigger sheets of it are used by the mind control nutters.
A 2 hole paper punch makes neat 5mm pads and a needle to make a pilot hole.
While there I could not resist a bag of miniature wooden 3/4 inch long
sprung clothes pegs by Artstraws ,Swansea, for holding small bits while
soldering or gluing, as I use the full size traditional wooden ones for so
many things , including broken apart for wedges.

I can only assume I will see more and more of these bad joints due to
lead-free soldering.
Just this afternoon I returned a marshall valvestate to its owner.
I had previously, last year , had to reinforce solder the main caps, which
is common enough with leaded solder in combos. At that time I did not
realise it was probably lead-free soldering especially as made 1998.
This time 5 different medium size components had bad solder.
Including one I've never seen from normal use rather than over-current/
heating. A flat-pack bridge rectifier had one visually obvious bad joint.
I pushed on the adjascent corner with just finger pressure of perhaps 8 to
16 ounces and that pushed through.
I had told him about this lead-free business when he dropped it off.
When he picked it up he said he'd mentioned it to a relative of his who
works for Marconi Aerospace and he was told the same about the problems
they have with it in their area.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

Meat Plow wrote in message
...
On Sat, 28 Jul 2007 12:59:37 +0000, Arfa Daily wrote:


"N Cook" wrote in message
...
I'm thinking of reinforcing solder points on dropper resistors,
subjected
to
vibration. Forcing a small pad of mesh over the lead and burying in the
solder.
Other than proper suppliers for large quantities, what sort of
shops/conventional applications would use it.?
My local decent hardware shop has nothing , a local machine mart has
expanded brass sheet but that is too coarse. Would there be a
gardening/horticulture use?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/



I have done this sort of thing in the past, and have just tightly
wrapped a
few turns of tinned copper wire around the leg, before burying the whole
in
solder. Seemed to work ok.

Arfa

Used solder wick works nice.


I have used that before and stripped coax shielding but they are both messy
for cutting small pads and also pushing mesh over the leads would give a bit
of mechanical grip even without any solder.
For large pads I've also used cut down and cleaned up old perforated zinc as
used in old larders for ventilation but keeping flies out. It seems to
solder quite well but its a bit thick for most components

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

N Cook wrote:

I'm thinking of reinforcing solder points on dropper resistors, subjected to
vibration. Forcing a small pad of mesh over the lead and burying in the
solder.
Other than proper suppliers for large quantities, what sort of
shops/conventional applications would use it.?
My local decent hardware shop has nothing , a local machine mart has
expanded brass sheet but that is too coarse. Would there be a
gardening/horticulture use?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/



I think window screens used to be made of it, and some probably still are.

--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form .

On Jul 28, 4:31 pm, CJT wrote:
N Cook wrote:
I'm thinking of reinforcing solder points on dropper resistors, subjected to
vibration. Forcing a small pad of mesh over the lead and burying in the
solder.
Other than proper suppliers for large quantities, what sort of
shops/conventional applications would use it.?
My local decent hardware shop has nothing , a local machine mart has
expanded brass sheet but that is too coarse. Would there be a
gardening/horticulture use?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

I think window screens used to be made of it, and some probably still are.

--
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minimize spam. Our true address is of the form .- Hide quoted text -

- Show quoted text -

You may have to special order honest to goodness copper window
screening. Most nowadays is either plastic or aluminum, neither of
which solders very well, especially with leadfree solder G.

H. R.(Bob) Hofmann

hr(bob) wrote in message
oups.com...
On Jul 28, 4:31 pm, CJT wrote:
N Cook wrote:
I'm thinking of reinforcing solder points on dropper resistors,
subjected to
vibration. Forcing a small pad of mesh over the lead and burying in
the
solder.
Other than proper suppliers for large quantities, what sort of
shops/conventional applications would use it.?
My local decent hardware shop has nothing , a local machine mart has
expanded brass sheet but that is too coarse. Would there be a
gardening/horticulture use?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

I think window screens used to be made of it, and some probably still
are.

--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form .-
Hide quoted text -

- Show quoted text -

You may have to special order honest to goodness copper window
screening. Most nowadays is either plastic or aluminum, neither of
which solders very well, especially with leadfree solder G.

H. R.(Bob) Hofmann


There are plenty of industrial suppliers of such mesh by the square m or by
the m but I
was after more sample size for this purpose.
The pack of hobby "keepsakes & card" making sheets would be enough for 2,000
or so
little copper and brass mesh pads.
I have to give credit to the "customer service" woman ot Hobbycrafts,
Southampton.
I'd gone all around their converted horticultural greenhouse and not found
what I was after. Of course this sort of query would not come up on their
stock computer as copper wire mesh but she interpreted what I was after,
recognised a product, and directed me to card making decorations and
materials to a pack I must have passed over as it looked like sheets of
reddish brown cards , in middle distance, as the mesh is so fine.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

N Cook wrote:
I'm thinking of reinforcing solder points on dropper resistors, subjected to
vibration. Forcing a small pad of mesh over the lead and burying in the
solder.
Other than proper suppliers for large quantities, what sort of
shops/conventional applications would use it.?
My local decent hardware shop has nothing , a local machine mart has
expanded brass sheet but that is too coarse. Would there be a
gardening/horticulture use?

Gasket for the magnetron on a microwave oven. They start off like a
flat brass washer, but you can tease them out into a flat sheet of fine
wire mesh. Find a local repairer and cadge a few old ones off him.


Ron(UK)

hr(bob) wrote:
Most nowadays is either plastic or aluminum, neither of
which solders very well, especially with leadfree solder G.

Oh I dunno, lead free works about as reliably on plastic as it does on
copper

Ron(UK)

Ron(UK) wrote in message
...
N Cook wrote:
I'm thinking of reinforcing solder points on dropper resistors,
subjected to
vibration. Forcing a small pad of mesh over the lead and burying in the
solder.
Other than proper suppliers for large quantities, what sort of
shops/conventional applications would use it.?
My local decent hardware shop has nothing , a local machine mart has
expanded brass sheet but that is too coarse. Would there be a
gardening/horticulture use?

Gasket for the magnetron on a microwave oven. They start off like a
flat brass washer, but you can tease them out into a flat sheet of fine
wire mesh. Find a local repairer and cadge a few old ones off him.


Ron(UK)

I've now got enough brass and copper cloth to keep me in pads for years but
I will have to be aware of shedding the odd almost hair sized bits of copper
wire fraying off the edges of this cloth - worse than tin whiskers. I think
I'll selvidge the edges oif these bits of metal "cloth".


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

On Sat, 28 Jul 2007 12:30:01 +0100, "N Cook"
wrote:

I'm thinking of reinforcing solder points on dropper resistors, subjected to
vibration. Forcing a small pad of mesh over the lead and burying in the
solder.
Other than proper suppliers for large quantities, what sort of
shops/conventional applications would use it.?
My local decent hardware shop has nothing , a local machine mart has
expanded brass sheet but that is too coarse. Would there be a
gardening/horticulture use?


Back in the day we used to get small pieces of brass/bronze screen
from autoparts stores. IIRC They were used for a of filter in
automatic transmissions. I don't know if they're still available as
I'm talking ~30 years ago.

steve

Stephan Goldstein wrote in message
...
On Sat, 28 Jul 2007 12:30:01 +0100, "N Cook"
wrote:

I'm thinking of reinforcing solder points on dropper resistors, subjected
to
vibration. Forcing a small pad of mesh over the lead and burying in the
solder.
Other than proper suppliers for large quantities, what sort of
shops/conventional applications would use it.?
My local decent hardware shop has nothing , a local machine mart has
expanded brass sheet but that is too coarse. Would there be a
gardening/horticulture use?


Back in the day we used to get small pieces of brass/bronze screen
from autoparts stores. IIRC They were used for a of filter in
automatic transmissions. I don't know if they're still available as
I'm talking ~30 years ago.

steve

Along the way I tried Kingstons auto spares, Southampton and the old boys in
there know all there is to know about car bits and could not help.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

Solder Wick may suffice.
"N Cook" wrote in message
...
Stephan Goldstein wrote in message
...
On Sat, 28 Jul 2007 12:30:01 +0100, "N Cook"
wrote:

I'm thinking of reinforcing solder points on dropper resistors,
subjected
to
vibration. Forcing a small pad of mesh over the lead and burying in the
solder.
Other than proper suppliers for large quantities, what sort of
shops/conventional applications would use it.?
My local decent hardware shop has nothing , a local machine mart has
expanded brass sheet but that is too coarse. Would there be a
gardening/horticulture use?


Back in the day we used to get small pieces of brass/bronze screen
from autoparts stores. IIRC They were used for a of filter in
automatic transmissions. I don't know if they're still available as
I'm talking ~30 years ago.

steve

Along the way I tried Kingstons auto spares, Southampton and the old boys
in
there know all there is to know about car bits and could not help.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/