[Elecraft] Field repair of blown K3 front end?

[Dave Hachadorian]

Here ya go:
http://marc.info/?l=elecraft&m=145323127930319&w=2

If you have the KXV3 installed, it is probably D5.  I checked the 
Mouser part number for the heavy-duty replacement, and it's still 
good.


Dave Hachadorian, K6LL
Yuma, AZ


-----Original Message----- 
From: Randy Farmer
Sent: Saturday, March 12, 2016 8:36 AM
To: Elecraft
Subject: [Elecraft] Field repair of blown K3 front end?

Due to an unlucky combination of station configuration and a bad 
TX gain
calibration in my K3s (since corrected) I've managed to burn out
something in the front end chain in my second station K3. I've 
verified
the problem is in the signal path between the ATU inputs and the 
input
to the main receiver. The Sub receiver is working correctly when
connected via the AUX RF input connector, but dead in normal 
split mode.
I've had a look at the schematic and can see a couple of probable 
points
of failure.

But... I wonder if anyone else has encountered the problem and 
done a
successful field repair. I'd have no particular trouble replacing 
one or
two parts on the main board, but without a board layout it would 
take a
fair amount of effort to find the suspect parts. I'm also not 
interested
in completely dismantling the radio if that's what it would take 
to
effect the repair.

Has anyone else found and fixed such a problem? I'd be very 
interested
in hearing your experience.

73...
Randy, W8FN
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