Rick, nice to work you in SS.
I find that the switching is essentially as fast as using the conventional
relays (for my setup). I have SPDT switches for the relay and the switch
selects between a positive and negative voltage going to the relay.
I suppose that you are using a rotary switch (SPNT) to send power to the
relay you want. If so, it would indeed be a faster change over than the
method I am using. I guess I wish I was cursed with the large area that you
have for those great antennas so this would be more of a problem for me. Oh
well, maybe in the next life.
73, Tod
> -----Original Message-----
> From: Richard Karlquist [mailto:richard@karlquist.com]
> Sent: Tuesday, November 18, 2003 9:54 AM
> To: Tod - ID; Topband@contesting.com
> Subject: RE: Topband: Cores and switches
>
> > When we are using these cores for receiving, why don't we
> simply use
> > latching relays --I do. A single, short, relatively high
> (40 ma) pulse
> > is enough to switch the relay state and after that little or no
> > current is required. By charging a large capacitor to supply the
> > current and using a series resistor to drop the voltage to the
> > capacitor one can dump the charge, switch the relay and
> limit the resting current down the coax line.
> >
> > Tod, KØTO
>
> In a contest, I am madly trying different beverages when
> being called by a station in an unknown direction.
> This is easier to do with conventional relays.
>
> Rick N6RK
>
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