[TenTec] [] Running a Century 21 on external 12V power

[Josh Gibbs]

I'm learning a lot about shielding... tons of good resources on the Net.
This article was particularly useful:

http://www.ets-lindgren.com/pdf/emctd_1293_weibler.pdf

The fact that Ten-Tec used aluminum when steel would have been cheaper is
interesting, especially since steel is much better at attenuating magnetic
fields. Perhaps they just had a bunch of aluminum around, so they used it.
It is much easier to cut and bend than steel.

One thing is for sure - Ten-Tec wouldn't have put that shield in there
without a good reason!

I'm going to start by replicating the Ten-Tec shield, but use steel rather
than aluminum. I may get some Mu Metal to experiment with - there is
someone selling sheets of it with damaged corners on eBay for a good
discount. Will post my results.

73,

-Josh

On Thu, Jun 8, 2017 at 12:16 PM, Stuart Rohre <Rohre at arlut.utexas.edu>
wrote:

> For magnetic fields like around a power transformer, the most effect of
> shielding is with steel or Mu Metal.
>
> Stuart Rohre
> K5KVH
>
>