Re: [Amps] Tube Standardization [Was] Stability of amps

[john.brewer@us.schneider-electric.com]

Indeed so, Doc, but at least there's a spec difference between the original and 
A and B
variants....hehehe

Cheers
John




                                                                                
               
             kd4e <doc@kd4e.com>                                                
               
                                                                                
               
             09/25/2007 02:11 PM                                                
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                   doc@kd4e.com                                                 
       Subject 
                                               Re: Tube Standardization [Was] 
Stability of     
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This is an interesting topic, isn't it true that
6146's varied within some of the series - the "B"
in particular, or was it the "A"?

It is also a problem with many modern devices where
a manufacturer will change a chipset in the middle
of a series with no evidence anywhere in the packaging
that such has happened.

Wreaks havoc when one has designed in reference to
one chipset and one receives another!

> Unless someone took the time to document why it was (with numbers)
> the one tube worked and the other didn't , then I'd suggest the
> answer is "no"... it's not good engineering practice. Unless you
> fully understand the difference between the two, can quantify it and
> put it in the specification, you'd have not guaranteed that the next
> lot of tubes from the GOOD manufacturer, would not suddenly stop
> working. John K5MO

--

Thanks! & 73, doc, KD4E
Personal: http://bibleseven.com/kd4e.html

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