Re: 1/4" copper tubing?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "huil888" <huil888@xxxxxxxxxxxx>

Jared -

You've got it backwards. Type "L" tubing is not refrigeration tubing.

Refrigeration tuning is designated by its outside diameter; 1/4"
refrigeration tubing measures a nominal 0.250" OD, with a 0.030" wall
thickness.

Type "K", "L" and "M" copper tubing is designated like standard pipe is; by
the inside diameter. 1/4" type K, L, or M copper tubing measures (nominally)
1/4" ID X 3/8" OD. K is heavy wall, L is medium wall, and M is light wall.

All of these types are available in coil form in fully annealed (dead soft)
temper.

If you are trying to wind a primary, or any other spiral or helical form, DO
NOT unroll the coil of tubing! If you are building a spiral primary, keep
the coil in its original form, and drop each turn down vertically into your
primary supports . If winding a helical primary, insert your coilform into
the center of the coil, secure one end of the coil to the form, and begin
winding your helix.

Regards,
Scott Hanson


----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, March 25, 2007 6:49 PM
Subject: 1/4" copper tubing?


> Original poster: "Jared Dwarshuis" <jdwarshuis@xxxxxxxxx>
>
> There are two types of 1/4 inch copper tube. The plumbing stuff is 1/4"
> outside diameter. The type- L- refrigeration tube is 1/4" Inside diameter.
> Type -L- is lovely stuff, it forms smooth bends and is almost as beefy as
> 3/8" O.D. plumbing tube. Type -L- works well with NST or with small pig
> coil. Large boxes of tube are easier to unroll without disorting and work
> hardening. ( try Graingers)