Maker Pro
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That Notorious Field-Strength Meter: the pictures at long last

L

Leon Heller

Jan 1, 1970
0
Paul said:
Interesting. But isn't this way of cutting traces supposedly
carcinogenic?

Why on earth should it be? You are only cutting through some copper, and
drilling through the SRBP or fibreglass.

Leon
 
R

Roger Gt

Jan 1, 1970
0
Paul Burridge said:
Interesting. But isn't this way of cutting traces supposedly
carcinogenic?

Actually the PAD CUTTERS have been around for a long time, I have some that
are at least 40 years old and I still use them.

They can be obtained form Digikey, but these are not the POS described above
and they will last a long time. Good tools help to do good work!

They are Digikey number V1056-ND Mfg pn P138A with handle and V1057-ND mfg
pn P138C with steel shank. These are made by Vector.

The on with the handle allows you to cut a pad by hand, no power tool
needed, the other is used in a drill press, (not a MOTO-TOOL) and both cut a
clean pad with a .040 inch hole.

Good building!
 
R

Roger Gt

Jan 1, 1970
0
Paul Burridge said:
Right, so I basically should think in reverse and etch out 'negatives'
of the traces. Goddit.


At least preserve most of the board as a ground plane when you cut pads to
mount components.
 
R

Rene Tschaggelar

Jan 1, 1970
0
Paul said:
Right, so I basically should think in reverse and etch out 'negatives'
of the traces. Goddit.

When you tape the board, yes.
However, modern software lets you draw traces and at the end
place a polygon fill connecting to the GND net.

Rene
 
J

James Meyer

Jan 1, 1970
0
I'm screwed over here trying to get single sided copper clad (none
at radio shack) without eating a shipping charge, and there you are
wasting that which I need, cock-knocker ;)

Paul could always take two single-sided boards and glue them together.

For the Aggies in the audience, foil sides out!

Jim
 
P

Paul Burridge

Jan 1, 1970
0
When you tape the board, yes.
However, modern software lets you draw traces and at the end
place a polygon fill connecting to the GND net.

I really should get some of this PCB drawing-up stuff. Everybody slags
off Eagle, so what are the alternatives?
 
A

Active8

Jan 1, 1970
0
Paul could always take two single-sided boards and glue them together.

For the Aggies in the audience, foil sides out!
^^^^
LOL

I love some of the aggie/longhorn humor. The Tx'ans kinda splain'd
it to me. I have to give them credit for being able to bash
themselves once in a while when they're not bashing Yankees.
 
L

Leon Heller

Jan 1, 1970
0
Paul said:
I really should get some of this PCB drawing-up stuff. Everybody slags
off Eagle, so what are the alternatives?

EasyPC is very good, I used it for years.

Leon
 
P

Paul Burridge

Jan 1, 1970
0
I'm screwed over here trying to get single sided copper clad (none
at radio shack) without eating a shipping charge, and there you are
wasting that which I need, cock-knocker ;)

Hey, I try to support those poor copper miners in Rhodesia as best I
can with lavish component spacing. Perhaps y'all should examine your
consiences and do likewise. :)
 
A

Active8

Jan 1, 1970
0
Interesting. But isn't this way of cutting traces supposedly
carcinogenic?

Why on earth should it be? You are only cutting through some copper, and
drilling through the SRBP or fibreglass.

Leon
[/QUOTE]
Wear a cheap face mask.
 
B

budgie

Jan 1, 1970
0
(snip)
I really should get some of this PCB drawing-up stuff. Everybody slags
off Eagle, so what are the alternatives?

Protel AutoTrax. Free. Runs under puer DOS, or in a DOS window under various
Windoze flavours including (apparently) XP. I have only used it up to 98SE and
it is well behaved.
 
M

Michael A. Terrell

Jan 1, 1970
0
Active8 said:
Why on earth should it be? You are only cutting through some copper, and
drilling through the SRBP or fibreglass.

Leon
Wear a cheap face mask.[/QUOTE]

You should be able to find a Clinton or a Reagan mask for almost
nothing, these days. ;-)

--
We now return you to our normally scheduled programming.

Take a look at this little cutie! ;-)
http://home.earthlink.net/~mike.terrell/photos.html

Michael A. Terrell
Central Florida
 
J

James Meyer

Jan 1, 1970
0
^^^^
LOL

I love some of the aggie/longhorn humor. The Tx'ans kinda splain'd
it to me. I have to give them credit for being able to bash
themselves once in a while when they're not bashing Yankees.

We've got a similar situation locally with Duke and NC State. It's
often heard over the PA when Duke hosts State for a game, "Will the State fan
please return to the parking lot. You left the lights on your tractor on."

Jim
 
J

John

Jan 1, 1970
0
Paul Burridge said:
Interesting. But isn't this way of cutting traces supposedly
carcinogenic?


About as carcinogenic as life itself.

By the way, I tend to leave as much copper ground around the traces as
possible... in addition to the ground plane the etching solution lasts much
longer as you are removing much less copper. Turn it on its head. Think of
it as removing copper sufficient only to insulate the required traces rather
than making only the connections and removing all the other copper.
 
A

Active8

Jan 1, 1970
0
Hello chaps,

[ snip ]
Follow these links and let me know what you think of my constructional
abilities...
http://freespace.virgin.net/orion.osiris/trace_side.gif
http://www.burridge8333.fsbusiness.co.uk/top_side.gif

The schematic to which this circuit relates can be found at this page:
http://www.burridge8333.fsbusiness.co.uk/fsm3.gif

Paul,
squeeze it and add a GND plane. Examples :

http://www.ibrtses.com/projects/diodenamp.jpg
http://www.ibrtses.com/products/SyncRF350MHz.jpg

Rene
[/QUOTE]
Oooh... I do like that enclosure. Note the multiple connections of
the top to bottom ground plane on both boards. That lowers
inductance of the connection.
 
L

Lee

Jan 1, 1970
0
NEATO! But clear as mud as to how to obtain in the US. Is there a US
source that doesn't require sending "bank notes" in the mail?
Jim,

Vector makes them, and Digikey carries them. Digikey pn: V1056-ND or V1057-ND.
Vector pn: P138A or P138C


Lee
 
P

Paul Burridge

Jan 1, 1970
0
By the way, I tend to leave as much copper ground around the traces as
possible... in addition to the ground plane the etching solution lasts much
longer as you are removing much less copper. Turn it on its head. Think of
it as removing copper sufficient only to insulate the required traces rather
than making only the connections and removing all the other copper.

Yes, that's well and truly sunk in, now. Just wondering, though, if
there's any type of project where it's *not* a good idea to make up
boards in this way?
 
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