[TenTec] Blown up Centurion

Jim Brown k9yc at audiosystemsgroup.com
Sat Sep 2 12:55:20 EDT 2017

Hi Micheael,

First, when replying to a Digest, please trim all the extra messages 
from it, leaving only the one you're replying to.

I don't know the Centurion, but I have a lot of experience with the 
Titan 425. It has a similar failure mode on a comparable board in its 
PSU. It the Titan, the failure is usually caused by arcing in the RF 
deck. And that arcing usually takes out semiconductors in the keying 
logic system.  So you'll need to troubleshoot to find those bad 
components AND repair the blown trace in the PSU. And, of course, figure 
out what was arcing in the RF deck.

I don't know the vintage of the Centurion. The Titan 425 is late-70s 
design, first built early '80s, so all the semiconductors are relatively 
generic discrete components.

73, Jim K9YC

On 9/2/2017 9:33 AM, Michael C. Marx wrote
> Well this morning I put a strong light and a fresh pair of eyes on the power supply board. Now it is obvious.  From where the secondary attaches to the power supply board, about an inch toward the front panel, I can see a burnt spot on component side of the board plus one of the traces is vaporized.   So, I guess I need to rebuild or replace that board. It looks like a booger to get out. Any hints on the easiest way to get it out?  Am I thinking correctly when I am surmising that it's probably a bad cap or diode and not transformer related since none of the fuses blew?  Thanks for all of your helpMike WB0SND

More information about the TenTec mailing list