audio recording on IC -help wanted

Wed Sep 29, 2004 2:14 pm   

If you aren't planning to run enough current through the coil to heat
it up appreciably, then ordinary PVC pipe (electrical conduit, or
Schedule 40 cold-water pipe) should work fine. You might want to use
CPVC pipe, which is a bit tougher and is rated for hot-water
service.

Odds are you can find a PVC fitting or "nipple" of a suitable size at
your local hardware store... or just ask a plumber for a cutoff/trim
piece from his last or next job.

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Wed Sep 29, 2004 2:14 pm   

Sorry, I should have given some more info...the dimension of the coil
"holder" are:

1 pc 2 1/4" O.D. x 6" long tubing having 1/16" thick wall
1 pc 1/8" x 2 1/2" x 2 1/2" for top of cover tube

Reviewing the article now for the current rating, but it uses a 20 amp fuse
in it. The coil (made from about 2.5 lbs of #16 magnet wire) will
(essentially) go right into the wall plug.

Thanks again for the quick replies....

-Mike-

Mike Sawalski wrote:

Wed Sep 29, 2004 2:14 pm   

On Sun, 6 Jul 2003 15:53:41 -0700, Watson A.Name - 'Watt Sun'
<alondra101_at_hotmail.com> Gave us:



not as part of the molding process.

Plastics Manufacturing Company, Dallas Texas, still makes phenolic
products.

Texas Ware they call it.

Visit a military surplus store. Or an industrial liquidator.
Easier, cheaper, and more4 likely to find what you need.

Wed Sep 29, 2004 2:14 pm   

"Mike Sawalski" <msawalski_at_wi.rr.com> wrote in message
news:3F0890F1.2430FD27_at_wi.rr.com...

Bakelite isn't used for much in the electronics world nowadays, but it's
still used for making handles, knobs, etc., for cookware. It's very heat
resistant; that's why it's a good choice in that type of application.
--
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Time is what keeps everything from happening all at once.

Wed Sep 29, 2004 2:14 pm   

On Sun, 6 Jul 2003 17:28:00 -0400, happyhobit hath writ:

A plastic pill bottle.

The (empty) barrel of a defunct ball-point pen.

Cardboard tubes: toilet paper, paper towel, carpet (big!).


I miss the smell of `over-heated` bakelite...

Jonesy
--
| Marvin L Jones | jonz | W3DHJ | OS/2
| Gunnison, Colorado | @ | Jonesy | linux __
| 7,703' -- 2,345m | config.com | DM68mn SK

Wed Sep 29, 2004 2:14 pm   

Mike Sawalski wrote:

Virtually any non magnetic material (most likely plastic of some
sort) of appropriate dimensions would be a suitable substitute.

Note that bakelite was significantly more heat-resistant than most
modern plastics, so keep that in mind if your electromagnet gets
warm/hot.


Why? Hasn't been made in decades. Use something modern.

Wed Sep 29, 2004 2:14 pm   

Mike Sawalski wrote:

I hope you've got a cheap source for that wire! I just ordered
a 1/2 lb spool from MPJA for $6.95 - at that price you'll spend
around $40.00 with shipping/handling. Please let us know if
you've got a cheaper source.

Wed Sep 29, 2004 2:14 pm   

ehsjr_at_bellatlantic.net wrote:

Sounds unlikely given that $40/2.5lb is about the price of copper
recently.

Wed Sep 29, 2004 2:14 pm   

On Sun, 06 Jul 2003 21:11:44 GMT, Mike Sawalski <msawalski_at_wi.rr.com>
wrote:


Anything plastic should do. IIRC Bakelite was paper embedded in a
thermosetting phenolic resin. There was also a similar material using
linen cloth and resin, widely used for electrical panels.

If you truly want the authentic look,and a custom design; there's a
phenolic glue (Aerolite?) that has that same reddish-brown look. You
could use that and paper like a fiberglass layup.

Wed Sep 29, 2004 2:14 pm   

Don Bruder wrote:

IIRC, bakelite is a phenolic resin -- also used in wood finishes.

Roll a tube from paper. Dip it in varnish.

Wed Sep 29, 2004 2:14 pm   

"Mike Sawalski" <msawalski_at_wi.rr.com> wrote in message
news:3F0890F1.2430FD27_at_wi.rr.com...

Go to McMaster-Carr there on line catalog I beleive they still sell it.

Bill

Wed Sep 29, 2004 2:14 pm   

In article <slrnbghqot.2djk.bit-bucket_at_localhost.config.com>, bit-
bucket_at_config.com mentioned...

That thin atmosphere up there must be getting to you if you think you
miss that smell. To my thinking, that's not somewhere that I'd like
my equipment to go. It's time to reach for the off switch when
equipment makes that smell.



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Wed Sep 29, 2004 2:14 pm   

On Sun, 06 Jul 2003 21:11:44 GMT, Mike Sawalski <msawalski_at_wi.rr.com>
wrote:


What you're looking for is linen or paper-based phenolic tubing you
ought to be able to buy it from any plastics supplier or Google for
"phenolic tubing" without the quotes. Here's an interesting link:

https://secure.consumersinterest.com/pml/components.asp?groupid=9
--
John Fields
Professional circuit designer
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Wed Sep 29, 2004 2:14 pm   

"Richard Crowley" <rcrowley7_at_xprt.net> wrote in message news:<vghshl1828g6e7_at_corp.supernews.com>...


There is a very modern web page at http://www.sumibe.co.jp/english/ on
current production and uses of Bakelite.

....

A brief history, including mention of Coco Chanel and her line of
Bakelite jewelry is at
http://www.collecting20thcentury.com/1998/bakelite.htm

Deeply buried in http://www.let.uu.nl/ams/xroads/bake-2.htm is the
mention of "designer as celebrity" by a group advancing the use of
Bakelite. Several of the pages churned up by Google mention either
Andy Warhol or Art Deco.

An excellent photograph of an incomplete Bakelite executive desk pen
set is included on page http://bakelite_world_2001.tripod.com/

Wed Sep 29, 2004 2:14 pm   

In article <3F08FD4D.E27D9324_at_bellatlantic.net>,
<ehsjr_at_bellatlantic.net> wrote:


Some time ago, somebody posted a recommendation: electric-motor-
rebuilding companies. They buy magnet wire in very large quantities
to rewind motors, and they might be willing to sell a batch or perhaps
some cutoffs.

--
Dave Platt <dplatt_at_radagast.org> 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!