[TenTec] Model 411 amp (aka Centaur)

[k8mp at aol.com]

Thanks Gary. I eye-balled the caps today. I didn't see anything bad but I was mainly looking for swelling.
If it's not a tube, I'll take another look at the caps.


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-----Original Message-----
From: Gary J FollettDukes HiFi <dukeshifi at comcast.net>
To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
Sent: Tue, Jan 26, 2016 10:17 PM
Subject: Re: [TenTec] Model 411 amp (aka Centaur)


I fellow up in northern Minnesota GAVE me one of those with exactly the same problem.

I found that one of the filter caps was pinched too hard during assembly and must have distorted the capacitor.

I replaced them all anyway but I sure got a good deal when I was done with it.

The tubes could do it too, even key up because the plate voltage is still applied to them in standby.

73

Gary



> On Jan 26, 2016, at 10:25 AM, Al Sirois <<a href='mailto:alsirois at roadrunner.com'>alsirois at roadrunner.com> wrote:
> 
> Tuesday noontime, Joe:
> 
> I have a Centaur..............keep it covered when not in use.
> 
> My Elmer told me to always keep it covered..................dust is the problem.
> 
> Even when covered, open it up every two-three years and do a internal cleaning.
> 
> N1MHC/alsirois
> =============
> 
> -----Original Message----- From: Joe Papworth via TenTec
> Sent: Tuesday, January 26, 2016 8:50 AM
> To: <a href='mailto:tentec at contesting.com'>tentec at contesting.com
> Cc: <a href='mailto:k8mp at aol.com'>k8mp at aol.com
> Subject: [TenTec] Model 411 amp (aka Centaur)
> 
> Gents,
> 
> 
> Have any of you gone a few rounds with a Centaur amp?
> I have a one that blows fuses very intermittently. It vaporizes them both, simultaneously, so it's apparently a dead-short somewhere. This happens even in stand-by. (i.e. No key-down)
> 
> 
> Before I tear into it, anyone have any ideas of common failures in these amps?
> 
> 
> Later, Joe, K8MP
> 
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