[R-390] Some progress

Tue, 07 Jan 2003 07:30:00 -0500

Hi,

The common agreement against steel in a chassis is conductivity at RF. It
turns out that the magnetic properties of steel force the RF current in to a
very thin section of the surface. That added to the resistance of the
material make for a problem. About the only way around that is a non
magnetic steel alloy. That gets darn expensive.

    Take Care!

        Bob Camp
        KB8TQ

----- Original Message -----
From: "polaraligned" <[email protected]>
To: "R-390 List" <[email protected]>
Sent: Tuesday, January 07, 2003 7:11 AM
Subject: Re: [R-390] Some progress

>
> > attractive for wiring in the first place.  Too bad it forms a coherent
> > non-conducting oxide so easily - bad for junction contact
>
> > Dan.
> >
>
> I am suprised they did not use thin stainless for a "no holds barred"
> receiver.  I'll bet the aluminum has caused a lot of strange problems
> in the past such as ground loops, etc because of the formation of
> aluminum oxide.  That is why I treated all my grounds.
> The best built radio I ever worked on was a Atwater Kent 55c which was
> built in 1929.  It had a stainless chassis and was made like
> a work of art.  The chassis cleaned up to almost a chrome plate look.
> Too bad the radio is not a performer....It is just a TRF unit in the days
> before commercial heterodyne radios.
>
> Scott
>
>
>
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