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 <[EMAIL PROTECTED]>
To: elecraft@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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