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Date:
Sun, 2 May 2010 15:48:27 -0600
Reply-To:
For blind ham radio operators <[log in to unmask]>
Subject:
Re: ARB 704 Purpose
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For blind ham radio operators <[log in to unmask]>
From:
Phil Scovell <[log in to unmask]>
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Butch,

Basically the same thing for switching those little back flashing voltages.

Phil.
[log in to unmask]
WWW.RedWhiteAndBlue.ORG


----- Original Message ----- 
From: "Butch Bussen" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, May 02, 2010 3:04 PM
Subject: Re: ARB 704 Purpose


> This is a good idea.  I may have to look into one of these as well.  A
> couple things can happen, one is the current pull of the relay coil in the
> amp which could overload the current rating of ttthe transceivers
> .  Also, when the power is removed from a relay coil, the collapsing field
> causes a reverse voltage which can damage components.  a way to fix this
> is wire a diode reverse across the coil so the diode shorts out the
> reverse voltage.
> 73
> Butch Bussen
> wa0vjr
> open Node 3148
> Las Vegas
>

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