XV432 Frequency and Power Stability

[Johnny Siu]

> Hi Stu,
>
> I am anxious to know the answer too.  Please keep the group
> informed about how you solve your problem. This could be the
> reason why I have been hesitating to order my XV432 for
> years.
>
> 73
>
> Johnny Siu VR2XMC
>
>
> --- 2008年8月31日 星期日，Stu2 <[hidden email]>
> 寫道﹕
>
> > 寄件人: Stu2 <[hidden email]>
> > 主題: [Elecraft] XV432 Frequency and Power Stability
> > 收件人: [hidden email]
> > 日期: 2008 8 31 星期日 上午 3:54
> > Hi All,
> >
> > I finished assembling a XV432 transverter and seem to
> have
> > a little
> > problem with both power and frequency stability. After
> > going through the
> > alignment steps, the power starts dropping from 20W
> down to
> > about 10
> > after sending CW into a dummy load for 20 seconds or
> so.
> > During this
> > time, the frequency drifts about 100 Hz. (Enough to
> detect
> > a pitch
> > change in another receiver.)
> >
> > I installed Q1 using the Teflon spacer. I have the
> crystal
> > oven
> > installed and the transverter was powered on for about
> 30
> > minutes or so
> > before I aligned it. (JP9 is on 4-5.) The part values
> > appear to be
> > correct. The problem appears if I use a 5W source or a
> 1
> > milliwatt
> > source. (Changing JP3,4,5,6 accordingly.) My radio is
> a
> > SDR-5000A.
> >
> > The power module doesn't get warm.
> >
> > I do NOT have the extra 5 turn coil and the 10pf
> capacitor
> > installed on
> > the power module. (Rev C1 errata.)
> >
> > Has anybody else had this problem and if so, how did
> you
> > fix it.
> >
> > Thanks!
> >
> > Stu
> > W7IY
>
>
>
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> 發表你的意見!

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