We have found a loose (de-soldered) diode 1N5408 in this factory assembled 
KPA500.
The diode shows >10Mohm in one direction and 2-3 Mohm (varying) in the other 
direction (DVM)
Where is this diode located (if there are several, then where?), what is its 
function and is it replaceable by a skilled tech person?
What could be the reason for the failure - it does not appear to have been 
over-heated, so desoldering appears not logical.

Is there a diagram of the KPA500 available?

73 from
Steen and Paul
OZ8SW (owner) and OZ4UN

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