[Elecraft] KPA100 post-assembly voltage test abnormal.

[Don Wilhelm]

David,

J3+ is the power supply voltage.  Make certain the APP connectors (both 
on the KPA100 and the Power cable) are correct.
Look at the end of the connector - you should see only the contact 
blade.  If you can see the spring finger that is under the contact 
blade, the contact blade is not inserted far enough.

Measure the voltage at the end of your power cable - it should be 13.8 
volts or higher (up to 15 volts is OK).  If not, check your power supply 
or the power cable.  Make sure all connections to the power supply are 
tight, and that the fuseholder on the power cable is assembled 
correctly.  The free side of the fuseholder should slide freely along 
the red wire.  If not, there may be a lack of contact with the fuse.

You can also check with your ohmmeter to be certain the J3+ line is not 
shorted to ground.

73,
Don W3FPR

On 7/12/2018 9:13 PM, David Dawson wrote:
> Hi to all,
> Just put together the KPA100, and did the initial voltage tests while connected to the K2. The preceeding resistance tests were within specs. The voltages were okay too, except for the J3+ which read 6V.
> I haven't come across any mention of this in the mail archives, could the ribbon cable be mis-wired. (I have normal colour vision, by the way.)
> thanks.
>