[Elecraft] XV50 problem is worst ! Need help.

[Jean-François Ménard]

Hi,

I verified all voltages in the troubleshooting section... both RX and  
TX.

I have a few readings that are not as the manual.

In RX, U7 (RF power module) PIN 1, I have 7.3 and should be to 0 !!!  
All other pins are OK.

In TX, U5, the leg on the same side of C9 is 5V and the leg on the  
side of C65 drop to 2.7V (should be around 4.7 ???)

All other measurements in the troubleshooting section are in the spec  
range.

So, If I consider that my problem is in RX..... Is these results  
could help ???


Le 07-01-11 à 20:45, Jean-François Ménard a écrit :

> Hi to all,
>
> Last week, my transverter XV50 was unable to receive properly...  
> Only a small voice in the background... no S unit... the guy  
> normally give me 10 or 20 over S9...  After a new alignment  
> procedure, I was unable to peak R13 to the desired level. I was  
> unable to get more than 0.043 V. So my conclusion was that Q3 is dead.
>
> I received a new Q3 transistor. Now it is installed. I did another  
> alignement. Now with Q3, I can peak R13 very easy to the target of  
> 250mV. Note that before and now, my TX is still perfect. So no  
> trouble with TX.
>
> But even after Q3 changed.... it is worst. I do not receive  
> anything at all... not even a small voice in the background.
>
> If I listen to the background noise.... with or without antenna, it  
> is the same. On the receiver input aligment, my noise generator did  
> not make any difference ON or OFF.
>
> So I really don't know where to start now. I don't have very much  
> experience in finding trouble.
>
> If someone could coach me where to start, I will really  
> appreciate... :-((
>
> Thanks for your times.
>
> ===========================
>
> Jean-François Ménard / VA2VYZ
> Elecraft K2 #4130 KX1 #999
> FISTS #11896
> SKCC #2245
>
> Web: http://web.mac.com/jf.menard
>
>
>
>
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===========================

Jean-François Ménard / VA2VYZ
Elecraft K2 #4130 KX1 #999
FISTS #11896
SKCC #2245

Web: http://web.mac.com/jf.menard




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