[Elecraft] KAT 500 Loses Match

[Jim Brown]

On 1/13/2024 2:02 PM, email wrote:
> With the K4 power (drive) low enough, the amp can make 200W.  Maybe not 
> efficiently. 

I regularly reduce drive from K3 or K4 to big amp to run 100W in NAQP, 
and on 60M, and 200W on 30M. I do that because I run the K3 and K4 for 
two-radio contesting from a 100Ah LiFePO4 battery that is floated 
through a charge regulator. That allows the battery to keep up during a 
long contest, AND run the radios in the range of 13VDC, where the output 
stage runs cleaner.

   (yes, 200W is only 3db more than 100W)  If FT8 RX level
> at -24, then 3db may be important ??

Depends on what you're trying to work, and conditions. I run legal limit 
with WSJT modes when going for DX on 160M (5,000 mile paths), and for 
weak signal propagation on 6M.

73, Jim K9YC
> 
> steve WB3LGC
> 
> On 1/12/24 7:52 PM, Ken WA8JXM wrote:
>> Why do you have the amplifier running?  30m is as restricted power band.