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From: jwvoto@itlnet.net
To: flyrotary@lancaironline.net
Subject: RE: [FlyRotary] Re: wire routing
Date: Wed, 7 Feb 2007 20:37:34 -0600
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---- Original Message ----
From: Lehanover@aol=2Ecom
To: flyrotary@lancaironline=2Enet
Subject: [FlyRotary] Re: wire routing
Date: Sun, 4 Feb 2007 01:09:03 EST

>=20
>In a message dated 2/3/2007 11:56:08 P=2EM=2E Eastern Standard Time, =20=

>jwvoto@itlnet=2Enet writes:
>
>Am I wrong, I believe that aluminum will not  shield magnetic flux,
>giving=20
>only electrostatic shielding; only steel will  shield magnetic flux=2E
>=20
>Wendell
>
>
>
>Notice that your IF cans have aluminum all around=3F  Never seen an IF=20=

>can=3F
>=20
>In the olden days radios had big vacuum tubes, and open core
>capacitors to =20
>adjust tank circuits and control frequencies=2E The Inter-frequency=20
>transformers=20
>had to be shielded to control phasing and awful noise in the  output=2E
>Thus=20
>the aluminum can shielding=2E Good for wave guides as well=2E=20
>=20
>Ferris metals concentrate flux fields (conduct flux lines well) and
>are  used=20
>in the cores of transformers and solenoids=2E =20
>=20
>Lynn E=2E Hanover

Why are transformers made with ferris metal=3F  If you want to contain
all the magnetic flux, I still content that steel or mu metal is the
way to go=2E I have never seen an aluminum magnet=2E
Wendell