[Elecraft] KX3 Amp

[Jim Brown]

On 6/30/2013 4:42 AM, KF5TEU wrote:
> Unfortunately , yes , I do need an amp. . We are going out over 200 mi. from
> the nearest real town and if we need help then I would really love to get
> through vs. be falsely proud of my QST skills that gets me nothing but dead
> air

It's important to understand that the power to run an amp must come from 
MUCH HEAVIER batteries that must be carried along with the radio.  Far 
better to LEARN how antennas work, learn CW if you don't already know 
it, and carry the wire and other light weight antenna accessories 
required to make reliable contacts with stuff you CAN carry.

Putting some numbers to it, a 100W Elecraft rig requires 20A to 
transmit. A 7Ah battery will give you 20 minutes of transmitting time at 
100W, but it will give you more than two HOURS at 5W.

73, Jim K9YC