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[aprssig] BOUY 4 Q's and comment

Kurt A. Freiberger kurt at badgers-hill.net
Thu Aug 7 21:20:36 UTC 2008



Steve Noskowicz wrote:

<snippage>

> 
>   Perhaps a magnetic switch.  Put a reed switch that has it's own magnet to turn it on, but not too strong.  Then an external magnet is used to cancel the field and open the reed.  Motorola antenna relays used this in the Micor and possibly other radios.  The "ON" magnet was a small one magnetized in place;   then, I believe, demagnetized to the required strength.  I should even have a few of the un-magnetized bars around here somewhere.
> 
>    If you go the other (obvious) way you'll need a fool-proof way of holding the magnet on the buoy ... and ... I'm sure you are familiar with "fool-proof methods".  (;-)

I can't resist..... "duck" tape?

>   Or perhaps an upright switch, but then there may be hi seas ... hmmm...
>   Good design problem.  {hint: reed switch and a magnet sliding in a tube)
> 

-- 
Kurt A. Freiberger     Austin, TX	kurt at badgers-hill.net
Amateur Radio Callsign WB5BBW  		AIM Handle: WB5BBW
        "Reputation is what other people know about you.
            Honor is what you know about yourself."
         - Lois McMaster Bujold - "A Civil Campaign"




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