Very good info, thank you!
Check out this neat article from 73 Magazine, Dec. 1977:
https://archive.org/stream/73-magazine-1977-12/12_December_1977#page/n29/mode/2up
There is the man himself, and a prototype C21 (look... no shield in there!)
=)
Apparently he lives in North Bend, OR. I'm considering trying to get in
touch with him to tell him how much I like his radio (and, I MAY have a few
questions... hi hi).
-Josh WA7FPV
On Thu, Jun 8, 2017 at 8:10 PM, Dukes HiFi <dukeshifi@comcast.net> wrote:
> Ten Tec once stated directly in their ads that they used Aluminum because
> it was lighter. I remember this because many hams at the time complained to
> Ten ten that TenTec radios felt sort of cheap since they were so light. The
> Ten Tec comment was a way to defuse that concern. There was never any
> technical reason for using Aluminum. The use of Aluminum goes all the way
> back to the Power Mite, their first product.
>
> Drake also used Aluminum for the main chassis and the separators for the
> PC boards as well. This was a departure for them since all previous chassis
> were either steel or the blasted Copper plated steel.
>
> As I said previously, in agreement with Carter and others, mag shielding
> MUST be magnetic material. Mumetal is nice because its permeability at low
> frequencies is 30,000 times that of cold rolled steel!
>
> At higher frequencies (>1 GHz) this advantage drops to unity so not so
> good at UHF. Too bad because I have an application in which I need good
> magnetic shielding at 10 GHz.
>
> Gary
>
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