[Milsurplus] First Military CRT ??

[Joe Foley]

Weren't the eye tubes a type of CRT?  6E5 is an
ancient designation.

Joe



--- aGEnuine ham <gl4d21@juno.com> wrote:
> Ben:
> 
> Your question raises some interesting points.  How
> would you define a
> "Military CRT"?  The reason I bring up the question
> is that I recall
> seeing one inch CRTs in pre-WW2 military
> transmitters for modulation
> monitors (maybe 913 was the type #?)and in other
> equipment from back in
> the 30s, long before RADAR and other 'exotic'
> applications existed.  The
> "A" scope and PPI display certainly kicked CRT
> development into high
> gear, followed by high precision oscilloscope tubes,
> but phosphor coated
> indicator tubes go way, way back.  Someone else may
> remember details
> better, but also, I think all the early tubes had
> all the connections out
> through the base, as glass to metal seal technology
> was also in its
> infancy, and side connections came later when
> extremely high voltages or
> high bandwidth was involved.
> 
> 73,
> George
> 
>
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