[Amps] 87 a query re align motors?

[Dick Green WC1M]

Does this happen on all bands? Did this happen suddenly? Was the amp working
OK before that? Was there any indication of a problem before the amp got
into this state?

If it happens on one or two bands only, I'd suspect something wrong in the
output network, like maybe a bad cap. If it happens on all bands, I'd
suspect something wrong in the path between the forward/reflected RF
detector and the output connecter. Could something wrong with the detector,
a bad PIN diode, a bad solder joint somewhere or even a bad connector.


73, Dick WC1M


-----Original Message-----
From: Charles Harpole [mailto:k4vud at hotmail.com] 
Sent: Friday, March 25, 2011 2:29 AM
To: amps at contesting.com
Subject: [Amps] 87 a query re align motors?


I need advice re the Alpha 87a .... all the auto tuning via AlphaMax or by
hand run the motors/caps all the way to one end or the other and give me a
not-so-good load with the TUNE indicator 7 to 9 LED bars to the RIGHT of
center.  Either this is a bad SWR load (shows ok on other rigs/tests) or
maybe the tuning stepper motors and caps are misaligned.
 
Anyone have advice about problem or a fix??????????
73,

Charles Harpole k4vud at hotmail.com