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Re: [Amps] More Clipperton L

To: "Alek Petkovic" <>," AMPS" <>
Subject: Re: [Amps] More Clipperton L
From: R.Measures <>
Date: Tue, 6 Jan 2004 06:32:01 -0800
List-post: <>

>G'day Ampers,
>I had a couple of spare hours today to play with the Dentron Clipperton L 
>amp I mentioned a few days ago.
>I measured the filament volts at the socket pins. 7.32 Volts was the result!
>With a combination of resistors in line, (7 x 0.47 Ohm/5w WW in parallel) I 
>now have it set to 6.15 Volts with 245 Volts on the mains. Hopefully that 
>will keep the new tubes happy.
>I guess it was not surprising that the 572B's which came with the amp were 
>dead flat. Funny enough, they were probably the original tubes. They are 
>marked Dentron, all with 7850 date codes.
>To answer Rich's last question on the subject of the tubes' demise, no, 
>there are no shorts in any tubes. None that I could measure with an ohm 
>meter anyway.
**  Tnx, Alek.  A high-potential breakdown tester might show a problem 
since the meltballs you see indicate that the grid may have come in 
contact with something.

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