XV50 Transverter Help

[James C. Hall, MD-2]

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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[Don Wilhelm-3]

Jamie,

If you are dealing with an XV50, you should not have an R39 installed. There
is no quiescent Current Adjustment for the XV50 - see the statement right
under the 'Part V - ...' title.

73,
Don W3FPR

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]]On Behalf Of James C. Hall, MD
> Sent: Sunday, March 04, 2007 6:57 PM
> To: [hidden email]
> 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
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> 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
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[Ron D'Eau Claire-2]

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: [hidden email]
[mailto:[hidden email]] On Behalf Of James C. Hall, MD
Sent: Sunday, March 04, 2007 3:57 PM
To: [hidden email]
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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_______________________________________________
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