The biggest difference between using a relay and a transistor is the time it
takes to do the switch. A transistor will switch in a few microseconds. A
relay will take in the order of 10 milliseconds to do the switch. It all
depends on what you are trying to do with this if the relay is fast enough
or not.
Carl Moreschi N4PY
121 Little Bell Drive
Bell Mountain
Hays, NC 28635
----- Original Message -----
From: "Grant Youngman" <nq5t@comcast.net>
To: "'Discussion of Ten-Tec Equipment'" <tentec@contesting.com>
Sent: Thursday, March 30, 2006 10:44 AM
Subject: Re: [TenTec] Orion Question
> > Grant, wouldn't a simple 12vdc relay work in this case? Why
> > would I need a transistor? OR is it because the logic is
> > reversed? (in that case, use the opposite N.O. poles)
>
> I think that would work just fine. Just run +12 (or +5 or whatever)
through
> a current limiting resistor in series with the relay coil and connect the
> other end of the coil to a TX OUT line. That will energize the relay when
> the Orion goes into transmit and pulls the TX OUT line low. And a N.O.
> contact can switch the voltage you want to control.
>
> Grant/NQ5T
>
>
>
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