[Amps] AL-1200 Ameritron help request...

[W7RY]

  ----- Original Message ----- 
  From: Bob Maser 
  To: Dave Weiss ; amps at contesting.com 
  Sent: Saturday, June 07, 2008 12:54 PM
  Subject: Re: [Amps] AL-1200 Ameritron help request...


  Probably just a loose license plate left in there by one of the convicts Hi. 

  What?? 

  Why not take the cover off and leave the B+ off and poke around to see what 
  is causing the buzz.  I don't need to tell you to use a non-conducting wand 
  to do the exploration.  I cannot understand why it would be the relay as it 
  shouldn't be energized in the standby mode.  Could be the blower.

  Bob W6TR
  ----- Original Message ----- 
  From: "Dave Weiss" <davidhweiss at gmail.com>
  To: <amps at contesting.com>
  Sent: Saturday, June 07, 2008 3:23 PM
  Subject: [Amps] AL-1200 Ameritron help request...


  > Hello:
  >
  > I have a new AL-1200 and it performs just fine on all bands.  It has an
  > issue that I did not expect:
  >
  > When I first turn it on, it is normally quiet, the blower on factory 
  > setting
  > (medium) is NOT noisy.  The plate voltage is 3500-3600 depending on house 
  > AC
  > usage.  After a minute or so, a loud buzzing sound is heard.  Ameritron
  > guided me to a relay mounted by a 1/4 inch stud and nut on the rear of the
  > unit.  The nut was loose and tightening it seemed to correct the issue for 
  > a
  > few minutes.  Pressure applied to the rear of the unit changes the pitch 
  > of
  > the buzz.  Everything else on the rear panel is secured properly.
  >
  > Has anyone experienced this problem?  Need some good help.
  >
  > Best 73
  >
  > Dave K3FT
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