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

[Bob Maser]

Probably just a loose license plate left in there by one of the convicts Hi. 
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
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps