K2/100 ALC

[Anthony Bowyer]

  I have a k2/100 that I want to be sure I understand
how the ALC should work.

  It seems it is more responsive than reactive; that
is power is increased if allowed, up to the maximum
rather that diminished from maximum as a response to
some factor, such as high SWR.

  When I first power the K2 on, if I send a series of
fast dots, the ALC seems to respond very slowly to
bring the power up to max. It's faster with dashes and
very fast with a dead carrier. It will basically
remain at full power then unless the SWR changes or
something similar, until it is powered off and then
back on, at which time it goes through the same
process.

  Is this how it should normally work?

  The reason I want to be sure is because this k2 had
some damage from the wrong cable plugged in at the
DB9. I found components damaged on the KSB2 board but
everything else seemed to be fine.
  I removed the KSB2, jumpered the correct connections
and put the capacitor back in and CW is working
correctly; just this ALC behavior is a little
different than I'm used to. I want to be sure there's
not another component bad in the ALC circuits
somewhere.

Thank you!
Anthony, NT4X  


 
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[Don Wilhelm-3]

Anthony,

That sounds like normal behavior to me.
Power control is accomplished in a loop that senses the power output and
adjusts as necessary to match the requested power.

73,
Don W3FPR

Anthony Bowyer wrote:

>   I have a k2/100 that I want to be sure I understand
> how the ALC should work.
>
>   It seems it is more responsive than reactive; that
> is power is increased if allowed, up to the maximum
> rather that diminished from maximum as a response to
> some factor, such as high SWR.
>
>   When I first power the K2 on, if I send a series of
> fast dots, the ALC seems to respond very slowly to
> bring the power up to max. It's faster with dashes and
> very fast with a dead carrier. It will basically
> remain at full power then unless the SWR changes or
> something similar, until it is powered off and then
> back on, at which time it goes through the same
> process.
>
>   Is this how it should normally work?
>
>   The reason I want to be sure is because this k2 had
> some damage from the wrong cable plugged in at the
> DB9. I found components damaged on the KSB2 board but
> everything else seemed to be fine.
>   I removed the KSB2, jumpered the correct connections
> and put the capacitor back in and CW is working
> correctly; just this ALC behavior is a little
> different than I'm used to. I want to be sure there's
> not another component bad in the ALC circuits
> somewhere.
>
> Thank you!
> Anthony, NT4X  

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