KPA1500/GainLow/Input Pwr

[Frank Scolaro]

Hi,

My KPA1500 just started needing a lot more drive (2X) to get 'normal'
output.  I normally need 25-30 watts drive to get ~1k out.  Now I need
about 60W.  I get two kinds of alarms, depending on how I test the
situation, either a red "Gain Low' or a yellow 'Input Pwr'.  If I drive
with a steady 10w, I get a 'Gain Low'.  On cw, Just before cutting out,
I can drive the amp with ~65w, get ~600w out, then get 'InputPwr"
followed by Gain Low' and the amp cuts out.

Time to go back to the factory?

Tnx, Frank W2YK
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[Roy Koeppe]

Frank,

Check the idling current: it should be 2 amps (keyed with no drive).

Gud luck, Roy   K6XK

> My KPA1500 just started needing a lot more drive (2X) to get 'normal'
> output.  I normally need 25-30 watts drive to get ~1k out.  Now I need
> about 60W.  I get two kinds of alarms, depending on how I test the
> situation, either a red "Gain Low' or a yellow 'Input Pwr'.  If I
> drive with a steady 10w, I get a 'Gain Low'.  On cw, Just before
> cutting out, I can drive the amp with ~65w, get ~600w out, then get
> 'InputPwr" followed by Gain Low' and the amp cuts out.
>
> Time to go back to the factory?
>
> Tnx, Frank W2YK
> _

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