[Elecraft] XV222 Mods Question

[Jeff Stai]

hi Mike - I checked my notes from field testing the XV222 and didn't see
any C12 mod, and I checked my actual XV222 and didn't find any extra caps
there.

Regarding Z4... there were a series of Builder's Alerts that came out with
mods to be made. It's possible that yours is also a field test and/or some
of the mods were not done in your version. Don W3FPR may be better able to
talk to that, and to have the Builder's Alerts handy in digital form so I
don't have to scan them for you. :)

Anyway, Alert #5 says Z4 is supposed to be a 56 ohm resistor. I'll have to
dig deeper to see what is up with Q1.

73 jeff wk6i


On Thu, Jun 10, 2021 at 3:08 PM Don Wilhelm <don at w3fpr.com> wrote:

> 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?
> >
>
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-- 
Jeff Stai ~ WK6I ~ wk6i.jeff at gmail.com
RTTY op at W7RN
Twisted Oak Winery ~ http://www.twistedoak.com/