[Elecraft] More power from K2

[Johnny Siu]

Hello Craig,

Thanks for reply.  Yes, ampere hour represents the
battery capacity and means longer operation hour for
K2.

On the other hand, K3 is also operating on 12-13.8v
but delivery full 100 watts.

I agree with you that 15 w is a very good compromise
between power output and current consumption.

With the advancement of battery technology, it is now
a real attraction to let the portable rig to deliver
more output whenever necessary.

I would like to use my K2 for portable operation
rather than my K3 because its standy current is merely
200mA.

If the design team of Elecraft can modify the maximum
power output to 25 w, K2 would be even marketable
(means more sale and profit to Elecraft) because:

1. best specifications among portable QRP radios;
2. lower standby current among portable QRP radios;
3. highest maximum output power among portable QRP
radios

While I am thinking of 25 watt output, it does not
mean that I shall operate the K2 at that level all the
time.  It will just give us the flexibility for more
power if we need it.

With such trend of advancement in battery technology,
there will be a day when we can even get a 4AH battery
easily and cheaply.

I am interested in learning the group's view and this
mail reflector is a real good discussion group.

cheers,

Johnny VR2XMC

--- "Craig D. Smith" <craig at powersmith.net> »¡¡G

> 
> Hi Johnny ...
> 
> I think you are missing a key concept about the
> battery rating.  The amp
> hour rating defines how much energy is contained in
> the battery - not its
> voltage.  To get more power out of the K2, you would
> need to raise the
> battery voltage.  Even if you did so, the K2 is not
> designed to operate at
> over 15V.  Don't go there!!   And, as others have
> pointed out, 25W would not
> be much more effective than its present 15W.  All
> the extra amp hours of the
> new battery will get you is extended battery life at
> the present 15W power
> level.  This can be a good thing if you are
> operating portable, but will not
> increase the power level of the transmitter.
> 
>            73
>


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