xv222

[Ron McMurray-2]

align part 1, voltage at tp1 no reading , voltage at q1 an q2 ok . have 6.75 on one side of c18  0 on other side.any suggestions
ron , kc0tdj
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[Ron D'Eau Claire-2]

Try adjusting L4A while monitoring the voltage at TP1. Sometimes the
oscillator is balky if the inductor is set at the wrong value.


Ron AC7AC

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Ron McMurray
Sent: Thursday, February 23, 2006 1:35 PM
To: elecraft post
Subject: [Elecraft] xv222


align part 1, voltage at tp1 no reading , voltage at q1 an q2 ok . have 6.75
on one side of c18  0 on other side.any suggestions ron , kc0tdj
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E

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[Matt Osborn]

On Thu, 23 Feb 2006 15:35:04 -0600, "Ron McMurray"
<[hidden email]> wrote:

>align part 1, voltage at tp1 no reading , voltage at q1 an q2 ok . have 6.75 on one side of c18  0 on other side.any suggestions
>ron , kc0tdj

The other side of C18 will require an RF probe to measure a voltage.
Diode D2 acts as an RF Detector allowing the 1.0 to 1.5 volts to be
measured at TP1.

The voltages on Q1 and Q2 indicated that JP-9 is properly connected,
so all you have to do is determine if the local oscillator is actually
working.  A 'scope would serve you well, lacking that, the RF probe
might also provide a clue.

On my XV144, I read 0VDC on the junction of C18 and D2 when using only
a DMM; using the RF Probe, I read 0.66 VDC.  The RF Probe measures
0.11VDC on the junction of C15  and Q2 and 4.0VDC on pin 4 of T1.

Hope this helps.


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