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Re: [Amps] rotary switch - shorting/non-shorting

Subject: Re: [Amps] rotary switch - shorting/non-shorting
From: Peter Chadwick <>
Date: Fri, 31 Aug 2007 10:16:19 +0200 (CEST)
List-post: <>
In my experience, in the UK, 'shorting' means 'progressively shorting', and is 
used for shorting out bits of tank coil. It can also be used for receiver type 
circuits, where unused coils are shorted out, usually by means of a ring on the 
rear of the switch. 'Shorting' and 'non shorting' in US terms are defined when 
you design the switch onto the switch manufacturers templates - it depends on 
the width of the tongue which it is. 'Oak' switches which came from a company 
called NSF and from AB Metals allowed the choice. AB seem to have dropped out, 
but NSF is still going well, and they still do ceramic switches.
>From experience, you can have great fun optimising a rotary switch design to 
>get the number of wafers and contacts to a minimum. A bewildering set of 
>choices too - reversed clips , reversed long clips, short clips,  reversed 
>short clips, insulated clips (generally to be avoided on reliability grounds) 
Peter G3RZP
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