[Boatanchors] tube sub's

Fri, 01 Nov 2002 10:51:53 -0700

P.P.S.... the reasoning for the development of the 'controlled-heater
warm-up' characteristic was to allow the tube to operate directly from 12
volts in Mobile service... given that alternator/gemerator outputs could
vary from 10-20Vdc, the control was necessary to increase the life of
tubes and ensure the operation of devices in Mobile service....again,
please correct me if I am wrong here... 73 de Jordan...

[email protected] wrote:

> I recently destroyed 7 perfectly good 12AU7 tubes by applying a
> different filament voltage by mistake.  lesson learned.  I got a bunch
> of 5963 tubes which are listed as a replacement for them.  Would there
> have been a reason to list 6 of the tubes in this piece of gear as
> 12AU7's and one 5963?  Any reason i can't use the 5963's in place of
> them?  Filament E and I is same.
>
> At the price of 12AU7's, and the 5963's are free it makes it a heck of
> lot cheaper to use them.  Just wondering if there is something you
> knowledgeable folks might have hidden in the back of the momory about
> this.
>
> Larry
> W0OGH
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