KPA 500

[Barry Simpson]

Does anyone know if the KPA 500 has a built in power supply ?

 

Barry Simpson  VK2BJ

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[Jeff Cochrane - VK4XA]

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[wayne burdick]

Yes. The KPA500 has an internal 60-V linear DC supply based on a  
toroidal transformer.

73,
Wayne
N6KR


Barry Simpson wrote:

> Does anyone know if the KPA 500 has a built in power supply ?

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This is interesting to me that the KPA500 as a 60 volt linear DC Supply.  

How much does the voltage sag and 500 watts?  

Is the 500 watts output or input?

Also, could you use this on the K2 as well?

Lee - K0WA
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[wayne burdick]

Lee Buller wrote:

> This is interesting to me that the KPA500 as a 60 volt linear DC  
> Supply.
>
> How much does the voltage sag at 500 watts?

60 V is the approximate voltage under load at full power.

> Is the 500 watts output or input?

Output. The amp actually puts out more than 500 W, but we're rating it  
conservatively.


> Also, could you use this on the K2 as well?

Yes.

Wayne
N6KR

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[Richard Squire - HB9ANM]

Hi Wayne and thanks for the info re KPA500 power supply

The toroid transformer in the KPA 500 takes up most of the space available in the K3-sized cabinet and it is amazing that the developers managed to add a linear regulator and even a 500W amp etc. – hi!
Now toroids are a bit "hard" on the inrush current and I guess some soft-start device has been provided for.
But my main concern is this: Is the toroid rated in such a way that no saturation/overheating will occur with the European mains frequency of 50Hz?

73
Richard

[KK7P]

> KPA500 power supply...
> ... Is the toroid rated in such a way that no
> saturation/overheating will occur with the European mains frequency of 50Hz?

The The KPA500 power transformer toroid is rated for operation at 50 Hz
as well as 60Hz.

73,

Lyle KK7P
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