My KPA500 has no 270v

[tomb18]

Well I just finished my kit and I power it up and press the HV button as instructed to, and I get .1V on the LCD. If I do press operate I get a hard fault of 270V error.
I checked the interlock switch and it's ok.  I also powered up the unit with the rear panel off and measured the actual 270V line (gray wire) and it measures 11 volts.  Sigh, without a schematic, I'm not sure where to go at this point.  I'll send an email to support but I guess I'll have to wait to the week days.
Anyone have any ideas?

Thanks, Tom
VA2FSQ

[ke9uw]

Go here for a schematic...

http://www.worldwidedx.com/amplifiers/96435-elecraft-kpa500-high-frequency-amplifier-manual-schematics.html

Chuck, KE9UW

[tomb18]

I removed the power supply and reassembled everything and the problem is gone.  It was not the interlock since this was tested.  All cables seemed ok.
Anyhow, thanks for all the help.
VA2FSQ

[Mike Harris]

Just a thought, why isn't the schematic available on the Elecraft site.
  What is the deal with worldwidedx?

Regards,

Mike VP8NO

On 16/10/2011 10:51, ke9uw wrote:
> Go here for a schematic...
>
> http://www.worldwidedx.com/amplifiers/96435-elecraft-kpa500-high-frequency-amplifier-manual-schematics.html
>
> Chuck, KE9UW
______________________________________________________________
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

[Richard Squire - HB9ANM]

The schematics used to be on the Elecraft site.
For some reason, they have been removed...

Guess they'll come up again some time!

73

Mike Harris wrote

Just a thought, why isn't the schematic available on the Elecraft site.
 

[Jim Sheldon]

I suspect they have been revised a few times since those were first posted and the revised ones are different enough that they pulled the originals to eliminate confusion.

W0EB

> The schematics used to be on the Elecraft site.
> For some reason, they have been removed...
>
> Guess they'll come up again some time!
>
> 73
>
> Mike Harris wrote:
>
>> Just a thought, why isn't the schematic available on the Elecraft
>> site.
>
>
> -----
> Richard - HB9ANM
> --
> View this message in context:
> http://elecraft.365791.n2.nabble.com/My-KPA500-has-no-270v-
> tp6897042p6898141.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> 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

... [show rest of quote]

______________________________________________________________
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