[Elecraft] Why we recommend 8 volts minimum for the KX1

Fri Nov 21 17:05:01 2003

Wayne (and other KX1 owners):
Can you begin to characterize operating time from a set of 6 AA lithium 
batteries?  I know this is difficult as the variables are many, but how 
many evenings operating, about an hour at a time, listening something like 
80%, might one expect?  (or whatever test conditions have been 
conducted...)

Have we reached a point in efficiency, that rechargeable batteries and 
solar panels are no longer needed for an outing a week in duration?

Tnx,
Steve
aa8af

Wayne Burdick <[email protected]> 
Sent by: [email protected]
11/21/2003 03:57 PM

To
Gil Stacy <[email protected]>
cc
[email protected], [email protected]
Subject
[Elecraft] Why we recommend 8 volts minimum for the KX1

Hi Gil,

You may occasionally operate your KX1 with a mismatched load or a poor 
ground.
This can result in higher transmit current and/or reduced noise immunity 
due to
high RF voltages on the chassis. Running from batteries that have a 
nominal
voltage above 8 volts will provide a safety margin at such times. 

We've actually tested the KX1 down to 6.5 volts operating into 50 ohms, 
but a
perfecly-matched load is rare during field operation. 

A set of six 1.5-volt lithium camera batteries will last a *very* long 
time in
the KX1, and they have a flat discharge curve. I strongly recommend them, 
even
though they're about twice as expensive as alkalines. 

73,
Wayne
N6KR 

Gil Stacy wrote:
> 
> I note on page 62 on the manual that "You can connect any 7-14
> VDC....although you should use the minimum recommended voltage (8V) when
> possible."  Why is 8 V recommended?
> 
> 73/Gil NN4CW
> K2 #3104
> KX-1 #54

-- 

http://www.elecraft.com
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