Voltage test of KPA500

[Steve Wender]

Hi all,

I just completed assembling a KPA500 and got as far as the power supply test.
When I do the power supply voltage test, the meter reads 7.9
volts.  Doesn't sound right.

Any thoughts?

thanks,

Steve


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[k6dgw]

Sent from my Samsung Epic™ 4G

Steve Wender <[hidden email]> wrote:

>Hi all,
>
>I just completed assembling a KPA500 and got as far as the power supply test.
>When I do the power supply voltage test, the meter reads 7.9
>volts.  Doesn't sound right.
>
>Any thoughts?
>
>thanks,
>
>Steve
>
>
>______________________________________________________________
>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
>
>

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[k6dgw]

You sure you're on the right range?  79 V would make sense. 73
Fred K6DGW

Sent from my Samsung Epic™ 4G

Steve Wender <[hidden email]> wrote:

>Hi all,
>
>I just completed assembling a KPA500 and got as far as the power supply test.
>When I do the power supply voltage test, the meter reads 7.9
>volts.  Doesn't sound right.
>
>Any thoughts?
>
>thanks,
>
>Steve
>
>
>______________________________________________________________
>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
>
>

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[Mark Bayern]

>>"the meter reads 7.9 volts

If this is the metering internal to the KPA500:

Maybe the transformer taps are wrong or bad? If we had a schematic of the
power supply we could find a location to measure the HVDC with an external
meter. (This would be like working on the plate supply of an old vacuum tube
amp, not like working on a 12V powered QRP rig -- be very careful! )

Maybe it is really 79 volts, but the display has a stuck decimal point? Does
that decimal point stay _all_ the time? Even when the display is used for
other readings/messages?

Mark  AD5SS



On Fri, Sep 9, 2011 at 11:38 PM, Steve Wender <[hidden email]>wrote:

> Hi all,
>
> I just completed assembling a KPA500 and got as far as the power supply
> test.
> When I do the power supply voltage test, the meter reads 7.9
> volts.  Doesn't sound right.
>
> Any thoughts?
>
> thanks,
>
> Steve
>
>

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Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
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