More power for K2

[Johnny Siu]

Hello Group,

This group is fantistic.  Of course, I got all answers
such as:

1. go for a better antenna;
2. not much difference in dB so don't border the
increase;
3. work better on the compression for SSB.

Naturally, all the above are very good advice. The
most encouraging answer is that a ham did send me
details for modification for higher power output.

Again, thanks for all your answers.  Now, I need to do
one thing - buy a 3.5AH battery and come back to this
group again for more details of the battery.

cheers for now,

Johnny VR2XMC


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[Kevin Cozens-2]

Johnny Siu wrote:
> Again, thanks for all your answers.  Now, I need to do
> one thing - buy a 3.5AH battery and come back to this
> group again for more details of the battery.

If you could get double the power out with the same battery voltage you would
be increasing your current draw from the battery by an equal factor. You would
get less operating time on the 3.5AH battery when running at the higher power
than you would from a 2.9AH batter when running at the standard maximum power
level.

--
Cheers!

Kevin.

http://www.ve3syb.ca/           |"What are we going to do today, Borg?"
Owner of Elecraft K2 #2172      |"Same thing we always do, Pinkutus:
                                 |  Try to assimilate the world!"
#include <disclaimer/favourite> |              -Pinkutus & the Borg
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[oe9fwv]

Kevin et al,

Kevin Cozens schrieb am 3 Feb 2008 um 17:38:

> > Again, thanks for all your answers.  Now, I need to do
> > one thing - buy a 3.5AH battery and come back to this
> > group again for more details of the battery.
>
> If you could get double the power out with the same battery voltage you
> would be increasing your current draw from the battery by an equal factor.
> You would get less operating time on the 3.5AH battery when running at the
> higher power than you would from a 2.9AH batter when running at the
> standard maximum power level.

I agree with your calculation if you use the same battery chemistry.
I you compare a lead acid battery with a Nicad or NiMh battery it is probably
a different thing. You should never deep discharge a lead acid battery. They
don't live very long if you do it. On the other side NiCad should not be
charged if they are not discharged. (memory effect)
So the real-live capacity of a battery is not written on the label in my
experience - it depends on many factors like current draw, temperature,
battery chemistry, quality of the build ....

73! de Werner OE9FWV

--
Sometimes I think I understand everything, then I regain consciousness.


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