[Elecraft] XV50 problem is worst ! Need help.

[Jean-François Ménard]

Could someone give me the voltage that should be read of each legs of  
Q3, U1 and Z1 on RX please ?!?!?

Le 07-01-11 à 21:25, Siu Johnny a écrit :

> Hi Jean,
>
> First of all, I have to admit that I am not an expert and would  
> suggest you contact Gary of Elecraft.
>
> From what you describe, you are ok on tx.  Then you should  
> concentrate yourself on RX route.  Check all the soldering points  
> around U1and K2 areas first and then followed by later stages in  
> the RX route e.g. ADEX-10H etc
>
> If you have a good attentuator such as AT1, input a weak weak 50Mhz  
> signal (or noise generator) at the antenna port J1 via the RF  
> attentuator.  Use another 50mhz receiver with a RF probe to trace  
> the signal along the RX path to see whether there is a break in the  
> signal path.
>
> Remember, use an RF attentuator in front of the antenna port
>
> 73
>
> Johnny VR2XMC
>
>
> From: Jean-Fran鏾is M閚ard <va2vyz at yahoo.ca>
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] XV50 problem is worst ! Need help.
> Date: Thu, 11 Jan 2007 20:45:14 -0500
>
> 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-Fran鏾is M閚ard / VA2VYZ
> Elecraft K2 #4130 KX1 #999
> FISTS #11896
> SKCC #2245
>
>
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===========================

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

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





===========================

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

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




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