KPA 500

classic Classic list List threaded Threaded
7 messages Options
Reply | Threaded
Open this post in threaded view
|

KPA 500

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

 

Barry Simpson  VK2BJ

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Reply | Threaded
Open this post in threaded view
|

Re: KPA 500

Jeff Cochrane - VK4XA
CONTENTS DELETED
The author has deleted this message.
Reply | Threaded
Open this post in threaded view
|

Re: KPA 500

wayne burdick
Administrator
In reply to this post by Barry Simpson
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 ?

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Reply | Threaded
Open this post in threaded view
|

Fw: KPA 500

k0wa@swbell.net
In reply to this post by Barry Simpson

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
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Reply | Threaded
Open this post in threaded view
|

Re: Fw: KPA 500

wayne burdick
Administrator
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

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Reply | Threaded
Open this post in threaded view
|

Re: KPA 500 - and 50 Hz in Europe?

Richard Squire - HB9ANM
In reply to this post by wayne burdick
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
Richard - HB9ANM
Reply | Threaded
Open this post in threaded view
|

Re: KPA 500 - and 50 Hz in Europe?

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
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html