[Elecraft] Elecraft [K2] : Power supply considerations.

[Jim Wiley]

Jean Pierre -

I have a K2 plus the KPA-100 and KAT-100 in a separate EC2 case.

I have tried 2 different MFJ power supplies, and both work well with the 
K2 100-watt combination.   The MFJ 4115 is small and light weight (1.5 
lbs, about 0.7 Kg), rated at 15 amperes continuous, 17 amperes surge.  
It is just big enough to run the rig + amplifier. Here is a link:

http://tinyurl.com/p5rq2xb

If you want a power supply with a little extra reserve capacity, then 
the MFJ 4125, rated at 22 amperes continuous, 25 amperes surge,  may be 
the one you want,.  It is of  course somewhat larger and heavier (2.9 
lbs, 1.35 Kg).  Here is a link to the 4125.

http://tinyurl.com/onw5r4d

Both are reasonably RF quiet, with few if any spurious signals, 
certainly none that would disrupt a QSO.

The 4115 operates from 115 volts AC only (actually 85 to about 135 
volts), the 4125 accepts either 115 or 220 volts AC (with similar wide 
tolerances).   If small size and minimum weight are the primary 
requirements, the 4115 is the best choice. If current limiting is ever a 
problem, simply reducing the transmitter power output to 80  or 90 watts 
will fix the problem, and the difference in signal at the receiving end 
will be virtually undetectable.  So far, I have never had a problem in 
this area.

- Jim, KL7CC





On 5/21/2013 11:12 PM, Behiels JeanPierre wrote:
> Hi K2 members; I am building on a K2(100W) rig. I near future I will 
> take the rig in use on holidays. I look for some compact power supply 
> suggestions witch I can take easily in my luggage during holiday for 
> this purpose. Has somebody any suggestions around, or some more useful 
> information where I could obtain a available one for K2 100W use ? I 
> think weight and dimensions are most important ? Regards Jean ON4AEF.