What! Louis Hart! Still active. Amazing. You were one of the guys who asked
(humbly) for being accepted as a member about 1996. Then you'll certainly
agree when I claim that you can solder on nearly everything with ultrasonic
soldering baths. I poored a handfull dirty coins in the bath, and when
I took them up all ver neatly tinnead.
Take care
Inge
On 10 August 2016 at 16:27, Louis Hart <[log in to unmask]> wrote:
> Carl, if the conductor thickness is less than the skin depth, would that
> mean the magnitude of the evanescent wave electric field would be great
> enough to allow propagation outside the shield? Sorry to say, my
> understanding of electromagnetic field theory is a lot less than what I
> think it should be, but I am curious.
>
> Regarding aluminum and soldering, I knew a guy who had a roll of 'aluminum
> solder' on his desk although I never saw him use it. The wire was several
> millimeters in diameters, so may not have been for electronic purposes.
>
> On the subject Drew brought up of mu-metal, I inherited a microwave
> spectrometer long ago which had a klystron housed in the stuff. The fellow
> who bequeathed it to me said the metal was great for shielding, but its
> desirable properties were degraded by mechanical forming.
>
> Nice to see good activity on TechNet. (I may qualify as one of the
> old-timers, having joined when it first appeared back in 1994 or 1995.)
> Louis Hart
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Carl Van Wormer
> Sent: Wednesday, August 10, 2016 9:16 AM
> To: [log in to unmask]
> Subject: Re: [TN] looking for medium resistance material
>
> My next attempt will be to try a metalized Mylar, hoping that the thin
> conductor (much thinner than the skin effect depth) will be good enough for
> the capacitive shielding, but too thin for significant eddy current flow
> from the magnetic field. If that work, I will be left with the "simple"
> matter of connecting to the shield. How do you solder a wire to a party
> balloon?
>
> Thanks,
> Carl
>
>
>
> Carl B. Van Wormer, P.E., AE7GD
> Senior Hardware Engineer
> Cipher Engineering LLC
> 21195 NW Evergreen Pkwy Ste 209
> Hillsboro, OR 97124-7167
> 503-617-7447x303
> [log in to unmask] http://cipherengineering.com
>
>
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