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

Subject: Re: [Amps] rotary switch - shorting/non-shorting
From: "Alex Malyava" <>
Date: Thu, 30 Aug 2007 14:24:28 -0400
List-post: <>
you know, guys,
I was kinda surprised that I was able to fry the switch in 200W-rated tuner
using only 100W RF. Geez, I did it in 5 nimutes :)

Speaking of replacement - I found Lorlin CK1458 at website. it is
250V or 15A rated, I hope it will work better than the dead one.
Is there any alternative place to look for rotary switches and possibly
variable capacitors/inductors?

2007/8/30, Tom Rauch <>:
> >
> > Aren't these switches known as "Make-Before-Break" and
> > "Break-Before-Make".
> Yes, that's another name in technical descriptions. In
> catalogs and by manufacturers (at least on this side of the
> pond) they are more commonly called "shorting" and
> "non-shorting" rather than the "make before break".
> For example Centralab uses "shorting" to describe a "make
> before break" contact. Non-shorting is used in their
> catalogs to describe "break before make".
> Amp Supply was big on ordering the wrong switch. What they
> wanted was "pick up and hold" design but with "non-shorting"
> contacts. What they always seemed to order was a "shorting"
> switch.
> You have to be very careful to look at what the manufacturer
> does, but in general (at least in the USA) the term
> "shorting" means make before break. That generally means the
> switch has much lower contact to contact voltage holdoff on
> adjacent contacts.
> 73 Tom
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