[Elecraft] KPA100 recommended max power for digital modes?

Jim Brown jim at audiosystemsgroup.com
Sat Feb 22 02:04:37 EST 2014


On 2/21/2014 7:43 PM, WA7SPY wrote:
> I was looking at the operating manual online and did not see any recommended power setting for operating the amp with digital modes.

Elecraft output stages are very well protected. In general, I feel 
comfortable running them "balls to the wall" with keydown modes, with 
all the lights lit. With well matched antennas, I run keydown modes at 
full power. If the output stage gets warm, the fan will run faster, and 
if that isn't enough, the rig will back off the drive.

Remember that the WSJT modes are "weak signal" modes, NOT low power 
modes. There is a big difference. We may get lots of distance per watt 
and be happy with QRP for easy paths, but for the most difficult paths 
(EME, transcontinental 160M), great digital ops pile on the watts and 
use their best antennas. I do a lot of QRP, but I also know when to turn 
on the big amp. :)

73, Jim K9YC


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