[Elecraft] KPA500 delay in getting to full power

[Don Wilhelm]

Mike,

Make certain it is the amp and not the K3.
Check the actual output from the K3 - disconnect the amp and drive the 
dummy load through an external wattmeter.  Don't change anything in the K3.
Does the power out follow the same pattern?
Try a band change (up and then back down) and then test again.

What I am saying is that it may be the K3 behavior instead of the amp.
The K3 power control starts out at a low value and then builds up to the 
requested power output.  The power output control is reset on a band 
change and at power on.
It should only take a couple dit times, it sounds like yours may be 
responding more slowly.
Probably not as noticeable at lower power, but certainly noticeable at 
the output of the amp.

73,
Don W3FPR

On 10/27/2013 7:58 AM, Mike Schultz KS0T wrote:
>      A problem just showed up with my 4 month old amp. If I send a string of dashes at 30 Watts out of my K3, the KPA amp puts out around 120 Watts for the first second or two then goes up to the expected output of 480 Watts.  This is on 20 meters to a Dummy load through my KAT500 tuner in bypass.  The ACCY plug was disconnected and PTT was direct from K3 to KPA500.  Amp firmware was beta 1.33 but no change when I reverted to release V1.23.
> Any ideas while I continue the CQWW SSB contest at a frustrating 100 Watts?
>
> 73, Mike KS0T
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