[Elecraft] Voltage test of KPA500

Mark Bayern plcmark at gmail.com
Sat Sep 10 10:24:31 EDT 2011


>>"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 <tobiebw2 at newmexico.com>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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