On Fri, 15 Dec 2000 12:24:55 -0000 Peter Chadwick
<Peter_Chadwick@mitel.com> writes:
Hi Peter,
>
>Marv says:
>
>> A rotating contact arrangement driven by small motors?
>
>I'd go for a solenoid driven system as being potentially cheaper, as
probably
>easier. If the moving contacts were the input and output of the section,
the
>bypass could be matched.
I have the motors, on hand; I also have the linear actuators for the
sliding approach
>
> ____
> | |
> B C
>In-------- ---------out
> A-----B
>
>The in/out could be parallel, as in the open frame style relay,
andarranged to
>make a slab line that was matched when closed.
That is cute for a single section but how does it transition to the
next section? There would necessarily have to be some flex in there
somewhere...
> Although I doubt the mismatch
>will be noticeable even at 30MHz. As the application sees a fair amount
of RF
>power, is silver plating really necessary? You could use copper rivets
to make
>contacts, fitted to contact arms of hard drawn copper strip; the arm A-B
could
>be just copper strip, too. With reasonable contact pressure, that should
be OK
>without silver plating or anything.
Since it will be wayyyyyy more work (time & $$$) than whatever the
materials cost, I figure that I may as well use (solid) silver.
>
>Sounds an interesting job for a small machine shop.
Fortunately, I have friends with same!
I should probably have also mentioned that this will not be hot
switched, and that the switching time may be "slow"; anything under a
second will be fine.
73,
Marv WC6W
*
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