[Boatanchors] Tektronix Type W Plug-In Unit

[n2lxm at juno.com]

Tektronix Type W  Plug-In Unit

High Gain Differential Comparator


Greeting's All,

 Can any one shed some light on a two-tube device used in the Tektronix 
plug-in.
It's a small oblong device mounted on a floating sub chassis and appears
tube house two RCA Nuvistor tubes. I was able to remove the tubes from
their holder; the only markings are as follows.

 RCA Nuvistor   5-48 ( date code I think )

 167 079 (printed in ink on the top)
 
 8056 330 (stamped into the metal on top)

 Dose Anyone have a way of or know what tubes this is. Any and all help
will be greatly appreciated. Thank You.

                                         Jeff N2LXM
                                          American
                                            Patriot
                                Amateur Radio Operator
                         Proud Father of Two U.S. Marines