[Elecraft] KPA100 U1 pin 3 -> ground | failure

[David Wilburn]

During the initial tests (from the right side of page 21 in the KPA100 
manual) on U1 pin 3 -> ground, I measured just under 4k as opposed to 
the > 10k.

I pulled out the schematic and checked pins 3 and 4 of the R-pack, and 
they measured correctly.  When I checked Q11, I read a bit over 100 ohms 
across the source and drain in both directions.  I pulled Q11 and the 
reading on U1 pin 3 went to greater than 10k.  I measured both 
directions of S & D on Q11 once it was out, and still read about 120 ohms.

I get the impression this is not good.
-- 

David Wilburn
dave.wilburn at verizon.net
K4DGW
K2 #5982