[ARC5] Loctal Tubes

[Bill Fuqua]

   Loctal tubes were developed as the next generation after octal tubes.
They did  not have wires coming out of the bottom of the envelope that had
to be soldered into a base.
    The pins exited the envelope just like the miniature tubes. They soon 
realized they
did not need the aluminum base at all and went straight to the miniature 
tube design.
73
Bill wa4lav


At 06:33 PM 4/30/2012 -0700, Kenneth G. Gordon wrote:
>On 30 Apr 2012 at 17:57, D C *Mac* Macdonald wrote:
>
> > I also suspect that in addition to better tolerance of higher
> > and variable voltages applied to the filaments in vehicular
> > and aircraft operation that the Loctals also used a socket
> > designed for more reliable contact with the pins in a high
> > vibration environment.
> >
> > If I recall, considerably more force was required to remove
> > the tubes from their sockets.
>
>That was only because the center "stud" was designed to lock-into a special
>socket. The pins themselves were not the issue.
>
>The tubes were called "Loctal" and lock-in tubes, because that center
>pin/stud locked into that special socket.
>
>Ken W7EKB
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