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[TenTec] Century 21 problem

To: <tentec@contesting.com>
Subject: [TenTec] Century 21 problem
From: Kb4utv@aol.com (Kb4utv@aol.com)
Date: Tue, 3 Aug 1999 23:11:30 EDT
I have a Century 21 with a drive problem.  It is hard to get the full 60 
watts input without drawing to much current from the power supply.  I get the 
hum in the side tone whenever this occurs.  Also when it seems to be behaving 
itself, the power output will flucuate between 30 and 15 watts, never a 
steady output/input, but not a large current pull on the power supply.  I 
checked antenna, coax, etc to be sure I wasn't getting a mismatch.  Am using 
a MFJ Tuner.  I think it might be associated with the power supply.  The 
switching transistor on the rear panel, I believe it is a 2N3055, gets really 
hot.  Could this transistor be the problem?  Looking at the power supply 
diagram, I think this is what regulates the voltage for the drive operation.  
Am I on the right track?  Any suggestions most helpful.  73's  John  KB4UTV

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