[Amps] Advice

Carl km1h at jeremy.mv.com
Mon Dec 7 15:15:27 PST 2009


If you want to critique Id appreciate it if you dont edit my post to suit 
your reply.

Carl


----- Original Message ----- 
From: "Bill, W6WRT" <dezrat1242 at yahoo.com>
To: <amps at contesting.com>
Sent: Monday, December 07, 2009 3:42 PM
Subject: Re: [Amps] Advice


> ORIGINAL MESSAGE:
>
> On Mon, 7 Dec 2009 09:30:49 -0500, "Carl" <km1h at jeremy.mv.com> wrote:
>
>>In other cases the spec was written for CCS worse case
>
> REPLY:
>
> I think I have to take issue with this statement. As I see it, the spec 
> for max
> temp on tube seals is absolute, based on the differential expansion rate 
> of
> metal vs either ceramic or glass. If you exceed it, even briefly, you are 
> asking
> for trouble. Doesn't matter if CCS or ICAS, go over the limit and the seal 
> will
> likely  break and leakage will follow. I understand the spec probably has 
> a
> little headroom in it, but if you don't know what it is, it's best not to 
> guess
> at it.
>
> I am not a vacuum tube engineer, so this may be taken with a grain of salt 
> if
> desired, but it makes sense to me. Comments?
>
> 73, Bill W6WRT
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