[Johnson] 12AT7 Tubes

[David C. Hallam]

Back in the days when I was a newly graduated metallurgical engineer just
learning the trade, my mentor who had been involved with vacuum tube
manufacturing during WWII told me that just because a certain name was on a
tube didn't mean that manufacturer made the tube.  Manufacturers ran
campaigns and when one type was run they would mark them with many different
manufacturers' name.

David
KC2JD/4

> -----Original Message-----
> From: Todd, KA1KAQ [mailto:ka1kaq at gmail.com]
> Sent: Friday, May 30, 2008 10:36 AM
> To: jeremy-ca
> Cc: dhallam at rapidsys.com; Johnson List
> Subject: Re: [Johnson] 12AT7 Tubes
>
>
> On Fri, May 30, 2008 at 10:16 AM, jeremy-ca <km1h at jeremy.mv.com> wrote:
>
> > We complain a lot about Chinese quality but our own quality was rather
> > sloppy at times. How quickly people forget.
>
> Trying to remember who the big company was who relabeled and sold the
> 'drops' from other companies. I remember Elmira Electronics sold
> Westinghouse tubes in the 80s that were supposedly the ones that other
> companies didn't want to sell.
>
> Seems like the quality and technological high points were reached just
> in time for tubes to fall from favor?
>
> ~ Todd,  KA1KAQ
>
>
>
>