[TenTec] Centurion is on the Fritz

[Bob McGraw - K4TAX]

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 at k8jhr.com>
To: "Discussion of Ten-Tec Equipment" <tentec at 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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