"John Woodgate" wrote in message
news
I read in sci.electronics.design that "Watson A.Name - \"Watt Sun, the
Dark Remover\"" wrote (in
) about 'wire size question', on
Sat, 9 Apr 2005:

I don't believe anyone uses vernier calipers anymore. I've got a
Helios dial caliper made a long time ago in Deutschland, but nowadays
a
caliper with a LCD is probably a lot cheaper.

In UK, you can get vernier calipers for around GBP1 (and mine check
out

For that cheap, you probably get plastic!
http://www.widgetsupply.com/page/WS/...-vernier/BET07

as quite sufficiently accurate). LCD calipers are about GBP35.

These look like a good deal on your side of the pond.
http://cgi.ebay.com/ws/eBayISAPI.dll...66&item=436984
3430&rd=1


--
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk

I read in sci.electronics.design that "Watson A.Name - \"Watt Sun, the
Dark Remover\"" wrote (in
) about 'wire size question', on
Sat, 9 Apr 2005:
These look like a good deal on your side of the pond.
http://cgi.ebay.com/ws/eBayISAPI.dll...66&item=436984
3430&rd=1

No longer there.
--
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk

"Watson A.Name - \"Watt Sun, the Dark Remover\"" wrote:

"Ian Stirling" wrote in message
...
In sci.electronics.design Albert wrote:
Does anyone know how to measure or determine the wire size. I have
tons of motors, solenoids, and similar items. I need some #24 wire
and
some #30 for a coil, but have to be sure regarding the wire diameter
as it's a critical ap and the author of the article says 'don't
substitute'.

Micrometer.
Vernier caliper may also work.
Either under $30US.

I don't believe anyone uses vernier calipers anymore. I've got a Helios
dial caliper made a long time ago in Deutschland, but nowadays a caliper
with a LCD is probably a lot cheaper.

Ohhh... I assumed anyone serious would be using a Mitotuyo ? digital LCD
vernier caliper anyway. We certainly have one.


Graham

"Pooh Bear" wrote in message
...


"Watson A.Name - \"Watt Sun, the Dark Remover\"" wrote:

"Ian Stirling" wrote in message
...
In sci.electronics.design Albert wrote:
Does anyone know how to measure or determine the wire size. I
have
tons of motors, solenoids, and similar items. I need some #24
wire
and
some #30 for a coil, but have to be sure regarding the wire
diameter
as it's a critical ap and the author of the article says 'don't
substitute'.

Micrometer.
Vernier caliper may also work.
Either under $30US.

I don't believe anyone uses vernier calipers anymore. I've got a
Helios
dial caliper made a long time ago in Deutschland, but nowadays a
caliper
with a LCD is probably a lot cheaper.

Ohhh... I assumed anyone serious would be using a Mitotuyo ? digital
LCD
vernier caliper anyway. We certainly have one.

I'm trying to figure out why they would be called vernier when they have
a LCD display.

Graham

On Sat, 09 Apr 2005 09:30:23 -0700, Watson A.Name - "Watt Sun, the Dark
Remover" wrote:


"Pooh Bear" wrote in message
...


"Watson A.Name - \"Watt Sun, the Dark Remover\"" wrote:

"Ian Stirling" wrote in message
...
In sci.electronics.design Albert wrote:
Does anyone know how to measure or determine the wire size. I
have
tons of motors, solenoids, and similar items. I need some #24
wire
and
some #30 for a coil, but have to be sure regarding the wire
diameter
as it's a critical ap and the author of the article says 'don't
substitute'.

Micrometer.
Vernier caliper may also work.
Either under $30US.

I don't believe anyone uses vernier calipers anymore. I've got a
Helios
dial caliper made a long time ago in Deutschland, but nowadays a
caliper
with a LCD is probably a lot cheaper.

Ohhh... I assumed anyone serious would be using a Mitotuyo ? digital
LCD
vernier caliper anyway. We certainly have one.

I'm trying to figure out why they would be called vernier when they have a
LCD display.


To distingush it from a micrometer caliper at one end of the tool
spectrum, and a monkey wrench at the other. ;-)

Cheers!
Rich

In sci.electronics.design "Watson A.Name - \"Watt Sun, the Dark Remover\"" wrote:

"Ian Stirling" wrote in message
...
In sci.electronics.design Albert wrote:
Does anyone know how to measure or determine the wire size. I have
tons of motors, solenoids, and similar items. I need some #24 wire
and
some #30 for a coil, but have to be sure regarding the wire diameter
as it's a critical ap and the author of the article says 'don't
substitute'.

Micrometer.
Vernier caliper may also work.
Either under $30US.

I don't believe anyone uses vernier calipers anymore. I've got a Helios
dial caliper made a long time ago in Deutschland, but nowadays a caliper
with a LCD is probably a lot cheaper.

I do.

I haven't got a LCD one, but a magazine sends me one every year.
Ok, it's made of plastic, but it works fine, and is accurate enough for
me, seeming to be within about .05mm

I'd like an LCD one of course.

On 09 Apr 2005 18:32:49 GMT, the renowned Ian Stirling
wrote:

In sci.electronics.design "Watson A.Name - \"Watt Sun, the Dark Remover\"" wrote:

"Ian Stirling" wrote in message
...
In sci.electronics.design Albert wrote:
Does anyone know how to measure or determine the wire size. I have
tons of motors, solenoids, and similar items. I need some #24 wire
and
some #30 for a coil, but have to be sure regarding the wire diameter
as it's a critical ap and the author of the article says 'don't
substitute'.

Micrometer.
Vernier caliper may also work.
Either under $30US.

I don't believe anyone uses vernier calipers anymore. I've got a Helios
dial caliper made a long time ago in Deutschland, but nowadays a caliper
with a LCD is probably a lot cheaper.

I do.

I haven't got a LCD one, but a magazine sends me one every year.
Ok, it's made of plastic, but it works fine, and is accurate enough for
me, seeming to be within about .05mm

I'd like an LCD one of course.

You should shell out the $20 or whatever then (or $100 and get a
Mitutoyo or other brand name with a bit better "feel"). I use mine all
the time- for rough (0.001") width, diameter, inside diameter
(rougher) and depth measurements. A micrometer is useful for precision
measurements, but less necessary for an EE.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

In sci.electronics.design Spehro Pefhany wrote:
On 09 Apr 2005 18:32:49 GMT, the renowned Ian Stirling
wrote:

In sci.electronics.design "Watson A.Name - \"Watt Sun, the Dark Remover\"" wrote:

"Ian Stirling" wrote in message
...
In sci.electronics.design Albert wrote:
Does anyone know how to measure or determine the wire size. I have
tons of motors, solenoids, and similar items. I need some #24 wire
and
some #30 for a coil, but have to be sure regarding the wire diameter
as it's a critical ap and the author of the article says 'don't
substitute'.

Micrometer.
Vernier caliper may also work.
Either under $30US.

I don't believe anyone uses vernier calipers anymore. I've got a Helios
dial caliper made a long time ago in Deutschland, but nowadays a caliper
with a LCD is probably a lot cheaper.

I do.

I haven't got a LCD one, but a magazine sends me one every year.
Ok, it's made of plastic, but it works fine, and is accurate enough for
me, seeming to be within about .05mm

I'd like an LCD one of course.

You should shell out the $20 or whatever then (or $100 and get a
Mitutoyo or other brand name with a bit better "feel"). I use mine all
the time- for rough (0.001") width, diameter, inside diameter
(rougher) and depth measurements. A micrometer is useful for precision
measurements, but less necessary for an EE.

Unfortunately, $20 is quite a lot of money at the moment :/

I don't have any real need for it - I've got a 0-25mm micrometer, and
the plastic caliper fills in for the rest.

I don't have any tools that can maintain that sort of tollerance anyway,
so my need is less.

Does anyone know how to measure or determine the wire size. I have
tons of motors, solenoids, and similar items. I need some #24 wire and
some #30 for a coil, but have to be sure regarding the wire diameter
as it's a critical ap and the author of the article says 'don't
substitute'.

A cautionary note - if it's that critical, then re-using wire which
has alread been wound might not be the best idea. You'd be starting
with wire which had already been bent/flexed, and if you aren't
careful this might put some kinks or irregularities in the winding of
your new coil which might affect its impedance or Q.

I know I can weigh it, provided it's not on a spool or motor winding
already.

My local electrical shop has a wire gauge, but it stops at 18 gauge.

A microscope might work, but ones that have calibrated distance
measuring on the eyepiece are expensive.

You might be able to do it with a vernier caliper.

24 gauge has a diameter of .511 mm or .0020"

30 gauge has a diameter of .255 mm or .001"

Every 3 gauge numbers corresponds to a 2:1 ratio in wire area (amount
of copper). Every 6 gauge numbers corresponds to a 2:1 ratio in wire
diameter.

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

On Thu, 07 Apr 2005 21:41:05 -0000, the renowned
(Dave Platt) wrote:

Does anyone know how to measure or determine the wire size. I have
tons of motors, solenoids, and similar items. I need some #24 wire and
some #30 for a coil, but have to be sure regarding the wire diameter
as it's a critical ap and the author of the article says 'don't
substitute'.

A cautionary note - if it's that critical, then re-using wire which
has alread been wound might not be the best idea. You'd be starting
with wire which had already been bent/flexed, and if you aren't
careful this might put some kinks or irregularities in the winding of
your new coil which might affect its impedance or Q.

I know I can weigh it, provided it's not on a spool or motor winding
already.

My local electrical shop has a wire gauge, but it stops at 18 gauge.

A microscope might work, but ones that have calibrated distance
measuring on the eyepiece are expensive.

You might be able to do it with a vernier caliper.

24 gauge has a diameter of .511 mm or .0020"

30 gauge has a diameter of .255 mm or .001"

Ooops, you're low by a factor of 10:1 in the inch calculations. Just
as well, since a caliper is hardly repeatable to 1 thou, let alone
measuring a diameter of that size with any accuracy.

Every 3 gauge numbers corresponds to a 2:1 ratio in wire area (amount
of copper). Every 6 gauge numbers corresponds to a 2:1 ratio in wire
diameter.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com