[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of ShawnMorrow
Sent: Tuesday, February 17, 2009 6:41 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KX1 appears dead after KXB3080 PCB installed...
...Help please!
I want to close out this thread now that my KX1 is back on the air on 80,
40,
30, and 20
I want to close out this thread now that my KX1 is back on the air on 80, 40,
30, and 20 meters.
I was doing another close visual before following up on Don's advice to
remove Q9. During that process I must of dislodged something that was
causing a short in the vicinity of T2. There were a coup
Shawn,
Yes - the NE612 is quite a hardy device. Try removing Q9 from the board
and see if the voltage at U5 pins 1 and 2 go up to the vicinity of 1.4
volts. If, no, then remove C8 and measure again - if still not 1.4
volts, replace U5 - or look for the solder bidge that is shorting the
produ
Thanks Don.
At one point I actually reseated U1 just to be sure so I think I'm good
there.
Checked out U5 as you suggested. Here is what I found:
Pin Spec Meas Pin Spec Meas
1 1.390 <<5 4.44 5.8 <<
2 1.390 <<6 5.57 5.7
3 0 0 7 4.96
Shawn,
KX1 display problems are usually caused by U1, so your suspicions are on
target.
Before doing anything else, be certain U1 is properly seated in its
socket. You should have almost all of the narrow part of the pins
inserted in the socket. If that is not the case, press it in - it does
I have been using my KX1 for the past year or so. This past weekend I
decided to install the KXB3080 option. Performing the checkout step after
the KXB3080 PCB install failed normal operation! Nothing works. My KX1 now
appears to be mostly dead. :-0
I am hoping the collective wisdom of the li
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