Maker Pro
Maker Pro

Who sells RF shield cans?

R

Robert Lacoste

Jan 1, 1970
0
Joerg said:
Where can one buy those tin-plated RF shields with snap-on lids? The stuff
modern TV tuners are using but for circuit board mounting (meaning open
frame with solder pins). One to two square inches, no more than 1/2" high
(because it must go onto VME boards). If it doesn't have a lid but is
permanently closed after soldering that would be sort of ok as well.

Things is, we don't need a million per month so the usual metal shop order
is out. Of course I know we could also buy and eat pounds of Altoids to
get those cans but I guess that might result in stomach aches.

Hi Joerg,

Just in case you need something a more custom than standard off the shelf
cans, but for prototype quantities : These is a very interesting (but quite
costly) solution from Microponents, allowing to build you own custom size
shield can. It is distributed in Europe by Radiospares, item number 455
8935.

Friendly,

Robert
www.alciom.com
 
L

Lostgallifreyan

Jan 1, 1970
0
Your next nym can be MissManners.

Please, don't temp fate. The Mystical Book of Plonkers already grows apace.
 
R

RST Engineering \(jw\)

Jan 1, 1970
0
Nobody, at least nobody when I looked a few years ago to shield the VCO in
the transmitter. What we wound up doing was buying shim brass from
McMaster-Carr and having the local machine shop whack up a full roll into
perimeter lengths and covers. Use bus-bar wire through the pc board a
little less than the height of the shield every so often around the INside
of the perimeter and overlap the ends. Fasten the ends with an alligator
clip and solder the ends together. THen solder the busbar "fence posts" to
the inside of the shield. Get the sucker to working and then tack-solder
the lid into place every so often. "every so often" is a trial and error
until you get the shielding you need.

If you only need a few hundred, I'd use the 0.001-0.002" shim stock, a
ruler, and an exacto knife. Give the kid next door two bits apiece to slice
and dice. Tell him to use gloves unless you are particularly fond of blood
on the shielding.

Jim
 
J

Joerg

Jan 1, 1970
0
Robert said:
Hi Joerg,

Just in case you need something a more custom than standard off the shelf
cans, but for prototype quantities : These is a very interesting (but quite
costly) solution from Microponents, allowing to build you own custom size
shield can. It is distributed in Europe by Radiospares, item number 455
8935.

That would be fine for the first prototypes. Dang, one of us is in the
UK right now but I don't have the final dimensions yet.
 
J

John Larkin

Jan 1, 1970
0
If you haven't noticed yet, there are no manners in this forum we
call Usenet.

A forum doesn't have manners, people do. Some of them.

Funny how a comic gets laughs and millions for doing the same thing
I get derided for in here.

But the comics are funny. Some of them.
Life just isn't that tragic. Try not to make it so, or fucking
wallow in your tragedy, I don't care either way.


Hey, I'm almost perfectly happy. Except for the chocolate turtle thing
maybe.


John
 
J

Joerg

Jan 1, 1970
0
MassiveProng said:
Yeah sure... at 60Hz.


People successfully use them to make efficient WLAN antennas on 2.45GHz.
Of course, that is most certainly not legal. But I'd be more worried
that the can wasn't 100% clean and next morning there'll be an ant
invasion around the new antenna.
 
J

Joerg

Jan 1, 1970
0
RST said:
Nobody, at least nobody when I looked a few years ago to shield the VCO in
the transmitter. What we wound up doing was buying shim brass from
McMaster-Carr and having the local machine shop whack up a full roll into
perimeter lengths and covers. Use bus-bar wire through the pc board a
little less than the height of the shield every so often around the INside
of the perimeter and overlap the ends. Fasten the ends with an alligator
clip and solder the ends together. THen solder the busbar "fence posts" to
the inside of the shield. Get the sucker to working and then tack-solder
the lid into place every so often. "every so often" is a trial and error
until you get the shielding you need.

If you only need a few hundred, I'd use the 0.001-0.002" shim stock, a
ruler, and an exacto knife. Give the kid next door two bits apiece to slice
and dice. Tell him to use gloves unless you are particularly fond of blood
on the shielding.

Jim

According to quite a few posts here there are now lots of suppliers.
Some even sell through small-qty places, at least in Europe.

I've used copper on the Sauerkraut-style prototype at the client. Looks
quite posh, actually. If I had my druthers I'd polish it with Wenol
paste to a super-glossy spit shine. Well, before any investors come
visit I just might do that.
 
M

Michael A. Terrell

Jan 1, 1970
0
John said:
A forum doesn't have manners, people do. Some of them.


But the comics are funny. Some of them.


If he was funny, he would be doing comedy clubs and getting paid for
it.

Hey, I'm almost perfectly happy. Except for the chocolate turtle thing
maybe.

John


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
M

MassiveProng

Jan 1, 1970
0
Please, don't temp fate. The Mystical Book of Plonkers already grows apace.


If you weren't such a retard, you'd know how to set your filters
better, boy.
 
M

MassiveProng

Jan 1, 1970
0
People successfully use them to make efficient WLAN antennas on 2.45GHz.
Of course, that is most certainly not legal. But I'd be more worried
that the can wasn't 100% clean and next morning there'll be an ant
invasion around the new antenna.


Can't possibly have more gain than the high gain versions
commercially available, so I hardly think they are illegal.
 
J

Joerg

Jan 1, 1970
0
MassiveProng said:
Can't possibly have more gain than the high gain versions
commercially available, so I hardly think they are illegal.


Well, sure, but they are connecting that to routers where the manual
more or less says that the goons come out when you tamper with the antenna.

Also, in some countries it is illegal to provide a link between one
property and another down the road. That's exactly what some people did
with such cans. Then they might have stepped onto the turf of a monopoly
from which the local government collects big bucks. So they'll both be
coming after them if they find out or someone snitches.
 
J

jasen

Jan 1, 1970
0
Please, don't temp fate. The Mystical Book of Plonkers already grows apace.

I don't allways kill-file them on their nym :)


Bye.
Jasen
 
L

Lostgallifreyan

Jan 1, 1970
0
I don't allways kill-file them on their nym :)

Nor me, but if you'd found a subtle troll spawning identities like
illusions in a hall of mirrors, you'd have some fun working out what to do,
no? The more that Google Groups or other accesses make Usenet like a forum,
the more this might happen, specially as Usenet has no forum-like controls
of names. Not that I think that should happen, that would be annoying.
 
J

Joerg

Jan 1, 1970
0
Lostgallifreyan said:
Nor me, but if you'd found a subtle troll spawning identities like
illusions in a hall of mirrors, you'd have some fun working out what to do,
no? The more that Google Groups or other accesses make Usenet like a forum,
the more this might happen, specially as Usenet has no forum-like controls
of names. Not that I think that should happen, that would be annoying.


Look at the bright side: Without Google Groups newsgroups like this
might be something we'd all take into the graves with us if it weren't
for an exposure outside usenet. Most of today's whizkids don't know what
a newsreader is, let alone usenet. They also don't really know what a
transistor is or how it works :-(
 
R

RST Engineering \(jw\)

Jan 1, 1970
0
A what?

{;-)


Jim



They also don't really know what a
 
L

Lostgallifreyan

Jan 1, 1970
0
Look at the bright side: Without Google Groups newsgroups like this
might be something we'd all take into the graves with us if it weren't
for an exposure outside usenet. Most of today's whizkids don't know
what a newsreader is, let alone usenet. They also don't really know
what a transistor is or how it works :-(

I don't mind Google Groups. No problem with it at all. Just saying toat
there are certain problems well known to forum operators, and we're going
to see both the best, and the worst..
 
J

Joerg

Jan 1, 1970
0
Lostgallifreyan said:
I don't mind Google Groups. No problem with it at all. Just saying toat
there are certain problems well known to forum operators, and we're going
to see both the best, and the worst..


So far I think it's pretty good on s.e.d. At least compared to some of
the rougher saloons out here in the West...
 
J

Joerg

Jan 1, 1970
0
RST said:
A what?

{;-)

A transister is them thar thang that's gitten the ballgame from the
errial into the loudspeaker so ya can listen to it when sittin' on the
tracter ;-)
Jim



They also don't really know what a
 
L

Lostgallifreyan

Jan 1, 1970
0
A transister is them thar thang that's gitten the ballgame from the
errial into the loudspeaker so ya can listen to it when sittin' on the
tracter ;-)

And whut the russkies ewsed in their darned ball thing that blipped and
foozled everone in the fifties... Mind yew, there's some wud say they're
still at it, midwest... Them and their triangle ships and they's pointy
liddle heads...
 
J

Joerg

Jan 1, 1970
0
Lostgallifreyan said:
And whut the russkies ewsed in their darned ball thing that blipped and
foozled everone in the fifties... Mind yew, there's some wud say they're
still at it, midwest... Them and their triangle ships and they's pointy
liddle heads...


Them's was them glass thangs that glows. Methinks.
 
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