[Elecraft] KPA-1500 ATU not working well

[Wes Stewart]

Offhand, since they are adamantly opposed to using operational ALC, I could see 
incorporating a "1500 W" gain calibration, as they do with K3s. They could read 
the output power at several frequencies per band and save the gain settings.  
This assumes they have enough memory in the K3 to save the values.

Of course fixing the root cause would be better.

Wes  N7WS


  On 6/22/2018 2:31 PM, K9MA wrote:
> My observation , also.
>
> Another approach would be for automatic drive adjustment, or ALC that worked. The latter, I know, is very difficult to do with an amp.
>
> Scott K9MA
>
> ----------
>
> Scott Ellington
>
>   --- via iPad
>
>> On Jun 22, 2018, at 2:36 PM, Paul Baldock <paul at paulbaldock.com> wrote:
>>
>> I have found that if the KPA1500 is feeding  a largish SWR (like 1.5:1 as you suggest) then the drive power required to maintain a constant output will vary significantly as you tune across a band. This means you have to keep adjusting the power control within a single band. This appears not to occur if the SWR is 1.1:1 or better.
>