XV50 Troubleshooting -- Need help

[Brian Wruble]

Hi all:

I am just doing the alignment for a recently completed XV50, to be used with
my K2.  I am on the step that says: "Key the 28MHz rig to provide transmit
RF to the transverter and advance R22 until you get a reading between 0.1
and 2 volts at TP5."  I found 0 volts here, and adjusting R22 had no effect.


That's my first problem.  

While checking voltages found in Appendix B, I accidentally shorted pins 1
and 2 of of U4.  Until that happened, I had the correct voltages.  After
that, I had only about 0.5v between 1 and 2 and about 1 v between 2 and 3.

What have I blown, do you think?  And any suggestions on the original
problem also greatly appreciated.

Thanks in advance.  73 de Brian W3BW


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[Brian F. Wruble]

OK.  Found the problem with U4 --- I blew a supply fuse.  I still need
suggestions on problem 1 --- R22 has no effect on the voltage at TP5, and
that voltage is very close to 0.

Tnx. de Brian W3BW

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Brian F. Wruble
Sent: Saturday, May 28, 2005 7:37 AM
To: [hidden email]
Subject: [Elecraft] XV50 Troubleshooting -- Need help

Hi all:

I am just doing the alignment for a recently completed XV50, to be used with
my K2.  I am on the step that says: "Key the 28MHz rig to provide transmit
RF to the transverter and advance R22 until you get a reading between 0.1
and 2 volts at TP5."  I found 0 volts here, and adjusting R22 had no effect.


That's my first problem.  

While checking voltages found in Appendix B, I accidentally shorted pins 1
and 2 of of U4.  Until that happened, I had the correct voltages.  After
that, I had only about 0.5v between 1 and 2 and about 1 v between 2 and 3.

What have I blown, do you think?  And any suggestions on the original
problem also greatly appreciated.

Thanks in advance.  73 de Brian W3BW


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Post to: [hidden email]
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Elecraft web page: http://www.elecraft.com

_______________________________________________
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Post to: [hidden email]
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Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com