When you lift the cover, there is a HV shorting bar that should short the HV
to ground. Notice I say SHOULD. Never take anything for granted when
working with any product that uses high voltage. Use a screwdriver with a
well insulated handle to short the Cap on the top of the tubes to chassis.
If you've spoken with Gary then take his advice.
73
Bob, K4TAX
----- Original Message -----
From: "Richards" <jrichards@k8jhr.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, October 24, 2014 7:29 AM
Subject: Re: [TenTec] Centurion is on the Fritz
Hi Rick -- Thank you for the suggestions.
1) Your diagnostics mirror those I received from Gary at TT and from
another qualified technician/repairman. Unfortunately, the amp failed
multiple diagnostics, and a conversation with Gary Green confirms it
requires a trip to TT HQ for a full debriefing.
2) Contrary to assumption, the amp failed right away. It failed after
just just few quick exchanges with my relay man in Texas, even before the
second check in. DARN !
3) Contrary to assertion, the amp has AMPLE ventilation. I don't want
anyone to get the impression it was boxed in. Perhaps you do not recall
our previous discussion on this, we worked this over pretty well some time
ago. The stand you mention has HUGE cut outs (larger than the vents in
the amp cabinet) and is open on the front and back. I added a pair of
120 mm fans to move air around it. There is a four inch clearance on one
side, and 10 inch clearance on the other, so there is no chance the amp
overheated because it is enclosed. It has better ventilation than if
something were stacked directly on or next to it. I am sure you just
don't recall how hard I worked to avoid boxing it in as it has been some
time since then.
THANK YOU ALL FOR YOUR QUICK AND HELPFUL SUGGESTIONS - All of which
confirm it is, as Rick correctly states, outside my expertise. I
appreciate all the suggested diagnostics which could be done with a closed
cabinet as I am surely disqualified from doing anything inside, especially
when it is powered on.
MY ONLY REMAINING QUESTION IS... Is there anything inside that can give
me a jolt (like a capacitor that needs to be discharged) while I remove
the tubes for shipping ? I would hate to discover that by surprise.
Thanks again... it all helped to confirm it requires a qualified
technician to fix.
Happy days.
-------------------------- JHR ---------------------------
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