[Elecraft] K3/0 power

[Dale Putnam]

And that would be a great way to do it Ed, easy on the equipment and with proper fusing, complete protection forthe radio, and the house. 

Have a great day, 
 
 
--...   ...--
Dale - WC7S in Wy
 
 

 > Date: Tue, 26 Feb 2013 23:49:19 -0900
> To: Elecraft at mailman.qth.net
> From: kl7uw at acsalaska.net
> Subject: Re: [Elecraft] K3/0 power
> 
> I have checked many of these "wall warts" and unloaded many so called 
> 12v unit output as high as 18v.  They seem to be a simple transformer 
> and diode if rated for dc.
> 
> One way they can safely be used with a varying load is to charge a 
> battery which then powers the electronics.  A battery looks like a 
> big capacitor to such supplies and provides a constant load plus 
> filters out ac ripple.  Added plus is the equipment is provided with 
> emergency power for short outages.
> 
> I run my 10-MHz station frequency standard (OCXO) with a wall wart 
> charging a Powersonics 17AH battery.  Ensures that the OCXO is not 
> frequency modulated by small ripple voltage, plus the OCXO is 
> stabilized since it runs 24/7.
> 
> 73, Ed - KL7UW
> 
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