The cord, oring and boot are equally susceptible to leaks (not too common
from what I've seen) and should be part of the pre-dive inspection and
should be regularly replaced.

   Jim
 -------------------------------------------------------------------
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> From: Klaus and Debbie Boehmke <dboehmke@be*.ne*>
> Date: Sun, 10 Sep 2000 15:42:57 -0400
> To: Jeff Disler <pdisler@io*.ne*>
> Cc: techdiver@aquanaut.com
> Subject: Re: Tech question
> 
> Jeff
> 
> Thanks for the info but I was aware of all that. My concern is the possible
> failure of the boot. Sounds like the latching relay and a reed switch could be
> an alternate way to go.Is the boot leak a legitimate concern and has anyone
> ever had this problem.
> 
> Klaus
> 
> 
> Jeff Disler wrote:
> 
>> At 10:45 AM 09/09/2000 -0400, Klaus and Debbie Boehmke wrote:
>> 
>>>> Hi all,
>>>> 
>>>> After close examination and disassembly of my Pro 6 lite, I have come to
>>>> the conclusion that the only thing between a working lite and a flooded
>>>> lite, is a thin rubber membrane over the on/off toggle switch.  Why is
>>>> this
>>>> more desireable over a reed magnetic switch such as those used on DPVs?
>> 
>> A reed switch is not designed to carry large current loads. Some of the
>> reed switches (like the ones use in scooters and electronics) will however
>> carry enough current to actuate the coil in a 12 volt relay made by any
>> number of manufactuers.
>> The relay used also must be capable of handling the current that the
>> selected bulb draws.
>> You could build the light this way, as long as the above conditions were
>> met, however, it would cause an increased amperage drain (as the relay must
>> have a constant current flow to hold the coil) on the entire system.
>> This of course would decrease the burn time of the light, as well as reduce
>> the voltage the bulb sees, thus making the light output somewhat less.
>> 
>> Hella manufactuers a solid state relay that enviromentally sealed and only
>> draws a few mah.
>> Also a latching relay would work. It takes a voltage pulse to close the
>> relay (completing the current path) and another to open the relay (closing
>> or breaking the current path). Latching relays do take a small amout of
>> current to operate but the interval is very brief(a few milliseconds). They
>> only draw current when the pulse is recieved they by making them the choice
>> for applications where the need to keep the voltage drain to a minumim is
>> desired.
>> 
>> A switch on the other hand, has only a very small amount of resistance and
>> is the less expensive method of curcuit completion for said purpose.
>> Because of its simplicity, it is less prone to failure.
>> Rubber boots come in varying thickness, I'd say that might be the direction
>> to the solution.
>> 
>> Regards JD
>> 
>> "SILT HAPPENS"JD   JEFF DISLER
>> SAFE CAVING       NSS 26000
> 
> 
> 
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