[Elecraft] 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 [EMAIL PROTECTED]
 寫道﹕
 
  寄件人: Stu2 [EMAIL PROTECTED]
  主題: [Elecraft] XV432 Frequency and Power Stability
  收件人: elecraft@mailman.qth.net
  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
 
 
 
   為了不斷提升Yahoo!
 Mail，雅虎香港誠邀你參與意見調查。請前往http://surveylink.yahoo.com/wix/p5429076.aspx
 發表你的意見!


  為了不斷提升Yahoo! 
Mail，雅虎香港誠邀你參與意見調查。請前往http://surveylink.yahoo.com/wix/p5429076.aspx 發表你的意見!
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[Elecraft] XV432 Frequency and Power Stability

[Stu2]

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
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft


Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com