[Elecraft] XV222 Mods Question

[Don Wilhelm]

Mike,

Has the paint been cleared from all parts of the enclosure that contact 
the 2D connectors?
If not, that could be reason for your observations.

You might want to remove those capacitors to see if all is well without 
them.
I have lots of experience with the Elecraft transverters and do not 
recall that as a mod.

73,
Don W3FPR

On 6/10/2021 5:37 PM, Mike Cizek W0VTT wrote:
> Greetings,
>
>   
>
> I recently purchased a used XV222 that had some modifications done in the
> local oscillator circuit. The construction was very sloppy, but transverter
> works OK most of the time.  Power output is adequate with good audio on SSB
> and receiver sensitivity seems OK.  Sometimes the xvtr goes in to parasitic
> oscillation.  I can stop the oscillation by touching certain parts of the
> case, and it will operate normally for a while.  Weird.  I cannot find any
> documentation about the mod on line.
>
>   
>
> It appears that two 2.2 pF caps have been added (on the bottom side of the
> board) in parallel with C12 (10pF), and the collector of Q1 goes above the
> board directly to Z4 instead of into its hole in the PCB.  Has anyone seen
> this mod or the reason for it documented anywhere?
>