[Amps] rotary switch - shorting/non-shorting

[David G4FTC]

>Amplifier tank or tuner, you NEVER want a shorting switch.
>( I never did get that fully drummed into the people at Amp
>Supply.)
>
>A shorting switch means the contact, as the switch is
>rotated, picks up the next contact before releasing the last
>contact. This is unnecessary in a tuner or amplifier.
>Shorting switches almost always have significantly less
>breakdown voltage than non-shorting switches of the same
>type.
>
>The confusion comes from the fact we often want a
>pick-up-and-hold switch, which some people mistakenly call a
>"shorting switch". The other less common name for "pick up
>and hold" is "progressively shorting", but that is NOT the
>same as a "shorting" switch.
>
>You never want to order a switch called a "shorting" switch.
>If you do that the leading rotating contacts will come
>positioned closer to the next open contacts so it "makes" on
>the new contact before the old contacts are released or
>before the detent locks the switch. You will have a switch
>that is intentionally built with close spacing to the next
>open contact, and we never want that.
>

Aren't these switches known as "Make-Before-Break" and "Break-Before-Make".

Regards

David G4FTC

_________________________________________________________________
The next generation of Hotmail is here!  http://www.newhotmail.co.uk