[TenTec] Troubleshooting Titan 425 Problem

[Doug Ferguson]

Art,
I am eagerly awaiting the return of my 425 after a $1200 repair bill from
Ten-Tec.  Mine kept blowing
fuses every few months and after replacing them, everything seemed fine.
However, this last time, 
something happened to the input circuit which presented a high SWR to my
Transceiver even though my
output and everything else seemed normal.  I could find no burnt components,
bad connections, etc. so
just decided to send off for repair.  As it turned out, there was an
occasional short to the case which
ended up ruining the T/R switch and the power transformer!!
Lesson learned:  if fuses blow, there could be a reason other than just poor
operating.
If you do decide to replace them, make sure you've checked every possible
inch of the amp for burn marks,
especially the case.
Good luck,
Doug - N7NM

-----Original Message-----
From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
On Behalf Of Art Trampler
Sent: Monday, March 22, 2010 2:16 PM
To: tentec at contesting.com
Subject: [TenTec] Troubleshooting Titan 425 Problem

Hey Gang,

Today before work I turned on my Titan and went to the kitchen for a cup of
coffee.  When I came back the amp was dead; its fuses are blown.  I believe
I was gone for at least three minutes.
 
I am hoping it will burn out to be a problem with a filter capacitor or some
filter capacitors, but have this simple question:
 
Do I risk further damage to the unit and its tubes (if they are still good)
by replacing the fuses and turning it on, to see when the fuses blow/if
there are any other concurrent events, such as the it being ready to
operate, etc?  If the failure is power supply related, I don't want to kill
the tubes inadvertently by this.
 
Thanks,
Art, KØRO
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