[Elecraft] XV50 Transverter Help

[Ron D'Eau Claire]

Hi, Jamie:

First, troubleshooting, voltage tables, etc., are in the Owner's Manual.
Their location is called out in the assembly manual on page 53: Final Test
and Alignment, in case you run into a problem like this. 

Be sure you incorporated Errata C-4 into the Owner's Manual. It includes an
updated schematic diagram for the XV50 that shows R39 and new voltage tables
for troubleshooting. 

My first guess would be that you left jumper W1 out. That would open the
bias circuit to the RF power amplifier module. It should have been installed
as the second step on page 39 (in the assembly manual) of the building
procedure. 

Ron AC7AC



-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of James C. Hall, MD
Sent: Sunday, March 04, 2007 3:57 PM
To: Elecraft at mailman.qth.net
Subject: [Elecraft] XV50 Transverter Help


Hello:

 

I'm in the process of aligning my transverter and I'm stuck on the RF PA
quiescent current adjustment, where R39 is adjusted to 20 mV when keying the
transverter. Before keying, I get 7 mV; after keying, no matter what
position R39 is in, I get only 12 mV. 

 

There is no troubleshooting section in the manual. Could someone point me in
the right direction ?

 

Thanks and 73, 

 

Jamie  WB4YDL 

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