RE: (ET) [Fwd: Key Switch]

["Hazen, Dwight L" <hazen indiana edu>]

Key switches (with two keys) should be available at Radio Shack or some
electronic supply place. The are used in home protection systems. The 
switch
should be 3-5 amp low voltage. I am sure Bill has them also.

I recommend keeping the key switch for safety reasons. 

 Dwight

-----Original Message-----
From: SteveS [mailto:ssawtelle fcc net] 
Sent: Wednesday, July 17, 2002 8:53 AM
To: elec-trak cosmos phy tufts edu
Subject: Re: (ET) [Fwd: Key Switch]

Well, I have an E12S, but I imagine they are similiar, so I'll hazard an
answer.

The key switch doesn't interrupt any large loads directly. It supplies 
power
to the circuit board, and via that, the relay coils. I would think the
switch you indicate would work. Most important is to use a switch rated for
DC since they are built different than AC-rated switches.  As I recall, an
AC switch has an easier life since, as the contacts are opening, the arc is
'extinguished' when the AC voltage passes thru zero. DC does not, so the
contacts and switch must deal with the arc. In addition, I note that the 
key
switch circuit goes thru the seat switch and that does not look like a very
high amperage device.

SteveS
E12S


----- Original Message -----
From: <Jeremy Gagliardi com>
To: "Elec-Trak" <>
Sent: Wednesday, July 17, 2002 9:21 AM
Subject: (ET) [Fwd: Key Switch]


> Okay, I'm beginning to think nobody saw my question about my key switch,
> since you all seem to be answering battery questions just fine.
>
> My post boils down to this:  What voltage and amperage does the key
> switch on an E-20 need to handle?  Will a 12V/10A switch suffice?
>
> --
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