[Elecraft] Battery power problems.

[Trevor Day]

Hi Tom, the K2 works very well from a 12v supply in normal 
circumstances; indeed, it is designed to run from an internal 12v supply 
as an option.

There are two possibilities that spring to mind from your description of 
the problem:

1.  You may be using a long power cable that is too light duty for the 
task and therefore causing a volt drop at the K2.
2.  There is RF getting into the power line and causing the distortion 
you experienced.

HTH

Trev G3ZYY

In message 
<17204026.1149648768547.JavaMail.root at elwamui-wigeon.atl.sa.earthlink.net
 >, Thomas Beltran <tbeltran at earthlink.net> writes
>I ran my K2 last weekend on a battery (from my backyard – fully 
>charged 52 Ah. Gel cell), and everyone on the net (40 meter SSB) 
>complained that the signal was distorted and just plain sounded very 
>bad. One person suggested that it was the 12 volts put out by the 
>battery, rather than the typical 13.8 volts.  I brought out my power 
>supply and everything worked fine.  I guess it was surprising that this 
>radio, that I understood was for portable operation wouldn’t 
>work well on battery power.  Has anyone else experienced this or is it 
>unique to my radio? This is a 4000 serial number.  I have on order the 
>W4RRY battery booster.  By comparison, my FT-857 seems unaffected by 12 
>volts.  Tom W6EIJ
>
>
>
>
>Thomas E. Beltran, Esq.
>BELTRAN, BELTRAN, SMITH OPPEL & MACKENZIE, L.L.P.
>2501 West Burbank Blvd.
>Suite 200
>Burbank, California 91505
>
>Telephone: (818) 567-1776
>Facsimile:  (818) 955-9877
>
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-- 
Trevor Day
UKSMG #217
www.uksmg.org