[Amps] Russian Power Tubes

[Gary K9GS]

That's silly....we're talking about building ham radio amplifiers here, one 
of a kind in most instances.  We're not concerned with specification 
variability, production yields, tolerance stack-ups, etc.  This line of 
reasoning may apply if you're Ameritron or Alpha but not if you're a 
hobbyist wanting to build an amp for personal use.

73,

Gary K9GS
++++++++++++++++++++++++++++++++++++++++++++++++
K9GS
Gary Schwartz           email: k9gs (at) arrl.net
Check out K9NS on the web: http://www.k9ns.com
Society of Midwest Contesters (SMC)     http://www.w9smc.com/
GMDXA http://www.eng.mu.edu/gmdxa/
++++++++++++++++++++++++++++++++++++++++++++++++

----- Original Message ----- 
From: "Bill, W6WRT" <dezrat1242 at yahoo.com>
To: <amps at contesting.com>
Sent: Tuesday, December 15, 2009 10:17 PM
Subject: Re: [Amps] Russian Power Tubes


> ORIGINAL MESSAGE:
>
> On Tue, 15 Dec 2009 21:22:38 -0500, "David H Craig" 
> <davidhcraig at verizon.net>
> wrote:
>
>>        I guess empircal evidence isn't germain to this discussion.... 
>> must
>>be flat-earth "theory."    I have some PE friemds that run close to 5KV on
>>the plate of a pair of GS35Bs on 50 MHz... again. I assume it irrelevant 
>>to
>>the "theory" gods.
>>        Dave N3DB
>
> REPLY:
>
> You are right, it is not relevant and I'll tell you why.
>
> Manufacturers often make production runs of a particular part which can 
> and do
> vary slightly from one run to another.  Just because one run of a part 
> will
> withstand say, 133% overvoltage, does not mean the next run will, even 
> though
> all parts meet specs. Wise designers know this and stick to the specs.
>
> 73, Bill W6WRT
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