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[TenTec] Centurion Trouble

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Subject: [TenTec] Centurion Trouble
From: hmmjr@erols.com (H. M. 'Puck' Motley W4PM)
Date: Wed, 24 Sep 1997 09:29:11 -0700
My Centurion failed for the second time in two years with the same 
trouble.  The tube filaments would not come on.  It seems Ten Tec uses 
some "rinky-dink" plastic feed-throughs to carry the filament voltage 
through the final sub-chassis to the connection to the filament choke 
below. Even though they have small lockwashers, the screws still loosen 
up and the increased resistance causes things to arc and generate heat 
which melts and burns the feed-through and corodes the connections.  
Finally the resistance gets so high no filament current will flow!  I 
cleaned and sanded the charred plastic and wire brushed the screw and 
hardware (good old dremel tool) and got it going again.  A more permanent 
fix will be to replace those plastic feed-through's with ceramic ones! 
Come on Ten Tec, stop trying to save a dime which then costs me a dollar 
in aggrevation due to the failure of cheap parts!   

A word to the wise - this amplifier, as well as most others, require 
routine maintenance.  They gather dust and the vibration from the fan 
running can cause screws to loosen.  Pop the top every few months, clean 
out the dust and check all screw connections especially those filament 
feed-throughs.  You'll be glad you did.  See related posting about wild 
life taking up residence in your amp.

Puck, W4PM

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