[Boatanchors] Re: 6211 tube

[Sheldon Daitch]

Barry,

thanks for the additional information.

I'd like a copy of the two PDF files.

THanks,

Sheldon

"Barry L. Ornitz" wrote:

> I believe it was Bob Mattson, W2AMI, who started the thread on
> the 6211 tube.  There have been lots of interesting responses.
> It does have the same pinout as a 12AT/AU/AX7 but it is not
> interchangeable.  I found the following information...
>
> From the Sylvania datasheet:
>
> "The Sylvania Type 6211 is a miniature, medium mu, twin triode
> designed for frequency divider circuits in electronic
> computers, and other 'on-off' control applications involving
> long periods of operation under cutoff conditions."
>
> From the Philips datasheet:
>
> "Special Quality double triode with separate cathodes for use
> in computer circuits.  The 6211 will maintain its emission
> after long periods of operation under cut-off conditions but
> is not intended to be used in circuits critical as to hum,
> microphony, or noise."
>
> Interestingly, the Philips datasheet gives specifications on
> when the tube has reached the end of its useable life.  I can
> send these datasheets in Adobe PDF format to anyone who wants
> them.
>
>         73,  Barry L. Ornitz     WA4VZQ     ornitz@tricon.net